Current weather · Sep 26, 11:49 PM EDT

32.7734, -79.9028

69°

ClearFeels like 69° · Humidity 53%NWS forecast for this hour; no recent station reportForecast by NWS Charleston, SC · grid 88,76
High
79°
Low
60°
Rain today
0%
Sunrise
7:10 AM
Sunset
7:11 PM

Hour by hour

NWS forecast grid

Scroll sideways for more hours. Pick an hour for every number.

Every hour as a table48 hours
TimeWeatherTemperatureFeels likeDew pointHumidityChanceAmountSnowDirWindGustSky coverThunderPressureVisibilityCeiling
Sat 11 PM69°69°51°53%0%WNW3 mph8 mph3%—10 mi
Sun 12 AM68°68°51°54%0%WNW3 mph8 mph4%—10 mi
Sun 1 AM66°66°52°61%0%W3 mph8 mph5%—10 mi
Sun 2 AM66°66°52°61%0%W5 mph9 mph9%—10 mi
Sun 3 AM64°64°53°67%0%WNW5 mph9 mph9%—10 mi
Sun 4 AM62°62°53°72%0%WNW5 mph10 mph10%—10 mi
Sun 5 AM61°61°53°75%0%WNW6 mph10 mph26%—10 mi
Sun 6 AM60°60°52°75%0%NW6 mph10 mph19%—10 mi
Sun 7 AM60°60°53°78%0%NW6 mph10 mph32%—10 mi
Sun 8 AM61°61°53°75%0%NW6 mph10 mph32%—10 mi
Sun 9 AM63°63°54°72%0%NW5 mph9 mph21%—10 mi
Sun 10 AM65°65°54°68%0%WNW5 mph9 mph7%—10 mi
Sun 11 AM69°69°54°59%0%WNW5 mph9 mph8%—10 mi
Sun 12 PM71°71°53°53%0%W5 mph10 mph9%—10 mi
Sun 1 PM74°74°54°50%0%W6 mph12 mph2%—10 mi
Sun 2 PM76°76°53°45%0%W8 mph14 mph15%—10 mi
Sun 3 PM77°77°54°45%0%W9 mph15 mph22%—10 mi
Sun 4 PM77°77°55°47%0%W10 mph16 mph20%—10 mi
Sun 5 PM79°79°57°47%0%W10 mph16 mph11%—10 mi
Sun 6 PM77°77°58°52%0%W9 mph15 mph7%—10 mi
Sun 7 PM75°75°57°54%0%WSW9 mph15 mph6%—10 mi
Sun 8 PM77°77°60°56%0%WSW9 mph15 mph10%—10 mi
Sun 9 PM75°75°62°64%0%SW8 mph15 mph7%—10 mi
Sun 10 PM75°75°63°66%0%WSW8 mph14 mph9%—10 mi
Sun 11 PM74°74°63°69%0%WSW7 mph13 mph6%—10 mi
Mon 12 AM73°73°63°71%0%WSW6 mph12 mph4%—10 mi
Mon 1 AM73°73°63°71%0%W5 mph10 mph4%—10 mi
Mon 2 AM72°72°64°76%0%W5 mph10 mph3%—10 mi
Mon 3 AM70°70°64°81%0%W5 mph9 mph3%—10 mi
Mon 4 AM69°69°64°84%0%WNW3 mph9 mph14%—10 mi
Mon 5 AM69°69°63°81%0%WNW3 mph9 mph18%—10 mi
Mon 6 AM67°67°63°87%0%NNW3 mph9 mph19%—10 mi
Mon 7 AM67°67°62°84%0%N5 mph9 mph15%—10 mi
Mon 8 AM67°67°62°84%0%N5 mph9 mph10%—10 mi
Mon 9 AM69°69°63°81%0%N3 mph8 mph0%—10 mi
Mon 10 AM71°71°63°76%0%NNE3 mph7 mph1%—10 mi
Mon 11 AM74°74°63°69%0%NNE3 mph7 mph2%—10 mi
Mon 12 PM76°76°63°64%0%ENE3 mph7 mph2%—10 mi
Mon 1 PM77°77°64°64%0%SE5 mph7 mph2%—10 mi
Mon 2 PM77°77°65°67%0%S5 mph8 mph2%—10 mi
Mon 3 PM78°78°66°67%0%S6 mph9 mph4%—10 mi
Mon 4 PM78°78°66°67%0%S7 mph12 mph5%—10 mi
Mon 5 PM78°78°67°69%0%S7 mph13 mph7%—10 mi
Mon 6 PM77°77°67°71%0%S7 mph13 mph8%—10 mi
Mon 7 PM77°77°68°74%0%S7 mph13 mph9%—10 mi
Mon 8 PM76°76°68°76%0%S6 mph12 mph10%—10 mi
Mon 9 PM75°75°68°79%0%S5 mph10 mph10%—10 mi
Mon 10 PM75°75°69°82%0%SSW5 mph9 mph10%—10 mi

The next 16 days

NWS grid published Sep 26, 8:30 PM EDT to day 8, the National Blend of Models to day 11, the mean of GFS, ECMWF, ECMWF AI to day 16
  1. TodaySep 2679°60°Mostly Clear0%wind 8 mph · gusts 14 mph
  2. SunSep 2780°67°Sunny0%wind 10 mph · gusts 16 mph
  3. MonSep 2879°72°Sunny0%wind 7 mph · gusts 13 mph
  4. TueSep 2981°75°Sunny1%wind 7 mph · gusts 13 mph
  5. WedSep 3081°76°Sunny4%wind 8 mph · gusts 14 mph
  6. ThuOct 181°76°Sunny8%wind 10 mph · gusts 16 mph
  7. FriOct 282°77°Mostly Sunny14%wind 9 mph · gusts 15 mph
  8. SatOct 381°76°Chance Showers And Thunderstorms43%wind 9 mph · gusts 15 mph
  9. SunOct 481°75°National Blend50%0.32 inwind 12 mph · gusts 18 mph
  10. MonOct 580°71°National Blend57%0.93 inwind 15 mph · gusts 22 mph
  11. TueOct 675°68°National Blend39%0.82 inwind 18 mph · gusts 24 mph
  12. WedOct 7~75°66°Model mean0.29 in
  13. ThuOct 8~77°63°Model mean
  14. FriOct 9~76°63°Model mean
  15. SatOct 10~77°66°Model mean0.28 in
  16. SunOct 11~73°60°Model mean

Right now

NWS grid for this hour · UV from the EPA · air quality from AirNow
  • Feels like69°
  • WindWNW 3 mphgusts 8 mph
  • Radar over this pointno reading
  • Humidity53%
  • Dew point51°
  • Pressure—
  • UV index—
  • Air quality—
  • Visibility10 mi
  • Sunrise and sunsetSunrise · Sunset · set
  • Moonrise7:04 PMMoonset 7:02 AM
  • Moon phaseFull moon100% lit

The National Blend of Models

NOAA NBM v5.0 · run of Sep 26, 8:00 PM EDT

NOAA’s weighted blend of every model it runs, to eleven days, with the chances the grid above does not carry. Where the local office’s grid reaches, its figure sits beneath the blend’s; where it does not, the blend stands alone.

  1. TodaySep 26—63°NWS grid 79° / 60°rain 0%wind 5 mph
  2. SunSep 2780°67°NWS grid 80° / 67°rain 0%wind 9 mph · gusts 15 mph
  3. MonSep 2879°71°NWS grid 79° / 72°rain 0%wind 7 mph
  4. TueSep 2980°75°NWS grid 81° / 75°rain 3%wind 7 mph · gusts 13 mph
  5. WedSep 3081°76°NWS grid 81° / 76°rain 1%wind 8 mph · gusts 14 mph
  6. ThuOct 181°76°NWS grid 81° / 76°rain 7%thunder 14%wind 9 mph · gusts 15 mph
  7. FriOct 282°77°NWS grid 82° / 77°rain 14%thunder 14%wind 8 mph · gusts 14 mph
  8. SatOct 381°76°NWS grid 81° / 76°rain 38%thunder 21%wind 10 mph · gusts 16 mph
  9. SunOct 481°75°Beyond the NWS gridrain 50%thunder 22%0.32 inwind 12 mph · gusts 18 mph
  10. MonOct 580°71°Beyond the NWS gridrain 57%0.93 inwind 15 mph · gusts 22 mph
  11. TueOct 675°68°Beyond the NWS gridrain 39%0.82 inwind 18 mph · gusts 24 mph
  12. WedOct 775°—Beyond the NWS gridrain 27%wind 15 mph · gusts 22 mph
59°73°86°SunMonTueWedThuFriSat

BlendNWS gridChance of rain, hourly

The models, side by side

HRRR Sep 26, 8:00 PM EDT · GFS Sep 26, 2:00 PM EDT · GEFS Sep 26, 2:00 PM EDT · ECMWF Sep 26, 8:00 AM EDT · ECMWF AI Sep 26, 8:00 AM EDT

Each line is one model’s own forecast at its own grid cell: three kilometers for HRRR, a quarter of a degree for the global models, which can sit a few hundred meters above or below the town. Where they agree the forecast is settled; where they part is where it is not.

50°68°86°SunMonTueWedThuFriSat

DayNWS gridHRRRGFSGEFSECMWFECMWF AI
Today Sep 2679° 60°~76° 71°~80° 65°~79° 68°77° 59°~76° 57°
Sun Sep 2780° 67°80° 61°82° 60°81° 61°81° 58°~79° 56°
Mon Sep 2879° 72°80° 68°84° 64°83° 66°81° 64°~82° 60°
Tue Sep 2981° 75°—85° 69°85° 72°82° 65°~82° 65°
Wed Sep 3081° 76°—84° 73°0.01 in84° 74°0.02 in83° 70°~83° 68°
Thu Oct 181° 76°—85° 73°84° 74°0.04 in82° 70°0.04 in~83° 71°0.04 in
Fri Oct 282° 77°—86° 75°0.01 in85° 75°0.11 in~84° 70°~85° 73°0.07 in
Sat Oct 381° 76°—85° 76°0.05 in85° 75°0.12 in~83° 70°~84° 76°0.11 in
Sun Oct 4——82° 76°0.41 in83° 76°0.26 in~80° 73°0.26 in~84° 77°0.13 in
Mon Oct 5——85° 76°0.19 in83° 75°0.28 in~85° 77°0.46 in~85° 78°0.60 in
Tue Oct 6——76° 67°0.02 in~79° 72°0.22 in~75° 73°0.11 in~79° 74°1.04 in
Wed Oct 7——~76° 66°—~73° 60°~77° 73°0.87 in
Thu Oct 8——~80° 63°—~77° 60°~74° 65°
Fri Oct 9——~75° 65°—~78° 63°~75° 62°
Sat Oct 10——~74° 66°—~82° 73°0.82 in~76° 59°
Sun Oct 11——~73° 60°—~75° 74°0.10 in~60° 57°

A ~ marks a high or low read from six-hourly steps, which miss the true extreme by a degree or two.

ECMWF ensemble meteogram

ECMWF ensemble meteogram for this place: box plots of cloud cover, precipitation, wind speed and temperature from the 51 ensemble members for ten days.
Rendered by ECMWF from its 51-member ensemble, in metric units: each box spans the middle half of the members, the whiskers the rest, the line the control run. A forecast, not an observation. © ECMWF, CC BY 4.0.

The next 90 days

NOAA GHCN normals and records at Charleston Exec (JZI) · Climate Prediction Center outlooks

No forecast has skill day by day past about two weeks, and this page does not print one. Where the models stop, the calendar takes over: the 1991 to 2020 normal for each date, the record high and low ever set on it, and where the Climate Prediction Center leans warm, cool, wet or dry over the coming weeks, the month and the season. A site that shows a high for a date three months out is showing you this normal with a wobble.

The forecast reaches Sun Oct 11, from the NWS grid, then the National Blend, then the mean of the global models. Beyond it the lines are the calendar.

Climate Prediction Center (CPC) temperature lean50%warmer 40% · Oct 202633% chance above normal · Oct to Dec20°40°60°80°TodayOct 1Nov 1Dec 1

Forecast high and lowNormal high and lowRecord high and lowCPC leans warmer than normalCPC near normal or equal chances

Week ofNormalWarmest on recordColdest on recordTemperature leanPrecipitation lean
Sep 2681° / 69°94° (1986)48° (1920)no outlookno outlook
Oct 379° / 67°95° (1919)44° (1974)50% chance above normal · days 6 to 1040% chance above normal · days 6 to 10
Oct 1078° / 65°89° (1941)44° (1906)40% chance above normal · Oct 2026equal chances · Oct 2026
Oct 1776° / 63°90° (1926)39° (1913)40% chance above normal · Oct 2026equal chances · Oct 2026
Oct 2474° / 60°86° (2001)37° (1926)40% chance above normal · Oct 2026equal chances · Oct 2026
Oct 3170° / 56°87° (1961)28° (1954)33% chance above normal · Oct to Dec50% chance above normal · Oct to Dec
Nov 769° / 55°84° (1989)32° (1913)33% chance above normal · Oct to Dec50% chance above normal · Oct to Dec
Nov 1466° / 51°84° (1955)28° (1940)33% chance above normal · Oct to Dec50% chance above normal · Oct to Dec
Nov 2166° / 52°83° (1899)17° (1950)33% chance above normal · Oct to Dec50% chance above normal · Oct to Dec
Nov 2865° / 51°81° (1931)26° (1903)33% chance above normal · Oct to Dec50% chance above normal · Oct to Dec
Dec 560° / 46°81° (1998)18° (1937)33% chance above normal · Oct to Dec50% chance above normal · Oct to Dec
Dec 1261° / 47°79° (1971)14° (1962)33% chance above normal · Oct to Dec50% chance above normal · Oct to Dec
Dec 1961° / 48°81° (1967)18° (1989)33% chance above normal · Oct to Dec50% chance above normal · Oct to Dec

Health and activities

Rules of thumb over the next 24 hours of forecast, the warnings in force, the station’s report, air quality and pollen

None of these is a measurement. Each is a rating of the forecast ahead, and of what is happening at the point right now, against what the activity or the ailment is known to mind, and each names the figure that decided it. An ailment or a pest is rated as a risk, low to extreme; an activity, a chore or a journey as a condition, poor to ideal.

The sun is down, so each rating says which span it is for: tomorrow’s daylight, tonight, or the next 24 hours.

Health

  • Arthritisnext 24 hLowsteady conditions
  • Sinus pressurenext 24 hLowsteady conditions
  • Common coldtomorrowLowmild
  • FlutomorrowLowmild
  • Migrainenext 24 hLowsteady conditions
  • Asthmanext 24 hLowclean air
  • Heat stresstomorrowLowmild
  • SunburntomorrowLowweak sun
  • Frostbitenext 24 hLowmild
  • SleepingtonightIdealcool, quiet night

Outdoors

  • RunningtomorrowGoodhot
  • HikingtomorrowIdealfine conditions
  • BikingtomorrowIdealfine conditions
  • GolftomorrowIdealfine conditions
  • FishingtomorrowIdealfine conditions
  • Boating and paddlingtomorrowIdealfine conditions
  • Beach and pooltomorrowIdealfine conditions
  • CampingtonightIdealfine conditions
  • StargazingtonightGoodbright moon

Travel

  • Air travelnext 24 hIdealclear skies
  • Drivingnext 24 hIdealclear roads

Home and garden

  • Lawn mowingtomorrowIdealfine conditions
  • GardeningtomorrowIdealfine conditions
  • Outdoor entertainingtomorrowIdealfine conditions
  • Drying laundry outsidetomorrowIdealfine conditions
  • Painting and outdoor projectstomorrowIdealfine conditions
  • FrosttonightLowmild

Pests

  • MosquitoestomorrowHighwarm
  • TickstomorrowHighwarm
  • Indoor pestsnext 24 hLowmild
  • Outdoor peststomorrowModeratewarm

Stargazing

Worked out from the NWS hourly forecast and the sun and moon

Tonight has no dark, clear hour without a bright moon in this forecast. Rated fair.

Night ofRatingDarkClear hoursClear and moonlessMoon litTransparency (est.)DewStrongest wind
SaturdayFair8:33 PM to 5:49 AM8 of 9None100%Good6 mph
SundayFair8:31 PM to 5:50 AM9 of 9None98%Fair8 mph
MondayFair8:30 PM to 5:51 AM10 of 10None94%Poor5 h6 mph
TuesdayFair8:29 PM to 5:51 AM10 of 101 h from 8:00 PM87%Poor1 h6 mph
WednesdayFair8:27 PM to 5:52 AM10 of 102 h from 8:00 PM80%Poor2 h7 mph
ThursdayPoor8:26 PM to 5:53 AM0 of 10None70%7 h7 mph
FridayPoor8:25 PM to 5:53 AM0 of 10None60%8 h7 mph

Dark is the sun 18 degrees below the horizon; where it never gets that low, 12 degrees, marked nautical. Clear is sky cover of 20% or less. A bright moon is one above the horizon with a quarter or more of its disc lit. Transparency in the table is estimated from surface humidity (70% and 85% mark fair and poor) and visibility, since the forecast carries no haze or high cloud moisture. Seeing and transparency by hour, where shown, are Environment and Climate Change Canada’s astronomy forecast (regional model; seeing from cloud, wind shear, turbulence near the ground and the surface temperature trend; transparency from the moisture through the whole air column), under the Open Government Licence - Canada. Dew is the air within 2 °C of its dew point. Excellent is four or more clear moonless hours with good transparency; good is three; fair is one, or two clear hours.

Golden hour and blue hour

Computed from the sun and moon positions
DayBlue hour, morningGolden hour, morningGolden hour, eveningBlue hour, evening
Sat6:46 AM to 6:55 AM6:55 AM to 7:43 AM6:38 PM to 7:26 PM7:26 PM to 7:35 PM
Sun6:47 AM to 6:56 AM6:56 AM to 7:44 AM6:37 PM to 7:25 PM7:25 PM to 7:34 PM
Mon6:47 AM to 6:57 AM6:57 AM to 7:44 AM6:36 PM to 7:23 PM7:23 PM to 7:33 PM
Tue6:48 AM to 6:57 AM6:57 AM to 7:45 AM6:34 PM to 7:22 PM7:22 PM to 7:31 PM
Wed6:49 AM to 6:58 AM6:58 AM to 7:46 AM6:33 PM to 7:21 PM7:21 PM to 7:30 PM
Thu6:49 AM to 6:59 AM6:59 AM to 7:46 AM6:31 PM to 7:19 PM7:19 PM to 7:29 PM
Fri6:50 AM to 6:59 AM6:59 AM to 7:47 AM6:30 PM to 7:18 PM7:18 PM to 7:27 PM
NESWSRSSMRMS
  • SR Sunrise 7:10 AM, 91° E
  • SS Sunset 7:11 PM, 269° W
  • MR Moonrise 7:04 PM, 83° E
  • MS Moonset 7:02 AM, 273° W
  • Full moon, 100% lit

Golden hour is the sun between 6 degrees above the horizon and 4 degrees below it; blue hour is the sun between 4 and 6 degrees below. These are the definitions timeanddate.com and PhotoPills use. Directions are degrees clockwise from true north, where the sun’s upper edge and the moon’s center cross a flat horizon; hills and buildings change both. None means the sun does not reach that height on the day; all day means it stays inside the band.

Drone flying

NWS hourly forecast, SWPC Kp, FAA TFRs and 14 CFR Part 107

This hour: fly with caution (gusts near or over your limit, night: lighting and night training required (107.29)). Next good stretch: Sun 8 AM to 4 PM, 8 hours.

Today: civil twilight for Part 107 6:40 AM to sunrise 7:10 AM, and sunset 7:11 PM to 7:41 PM. Anti-collision lighting is required in those minutes and at night.

Sat
Sun12 AM6 AM12 PM6 PM
Mon12 AM6 AM12 PM6 PM

Good Caution No-fly

HourVerdictWind (mph)400 ft est. (mph)Gust (mph)RainVisibilityCloud allowsTempKpWhy
Sat 11 PMCaution314180%10 mi69°gusts near or over your limit, night: lighting and night training required (107.29)
Sun 12 AMCaution314180%10 mi68°gusts near or over your limit, night: lighting and night training required (107.29)
Sun 1 AMCaution314180%10 mi66°gusts near or over your limit, night: lighting and night training required (107.29)
Sun 2 AMCaution518230%10 mi66°wind at 400 ft near or over your limit, gusts near or over your limit, night: lighting and night training required (107.29)
Sun 3 AMCaution518230%10 mi64°wind at 400 ft near or over your limit, gusts near or over your limit, night: lighting and night training required (107.29)
Sun 4 AMCaution518240%10 mi62°wind at 400 ft near or over your limit, gusts near or over your limit, night: lighting and night training required (107.29)
Sun 5 AMNo-fly623270%10 mi61°gusts near or over your limit, wind at 400 ft near or over your limit, night: lighting and night training required (107.29)
Sun 6 AMNo-fly623270%10 mi60°gusts near or over your limit, wind at 400 ft near or over your limit, night: lighting and night training required (107.29)
Sun 7 AMCaution67120%10 mi60°civil twilight: lighting required (107.29)
Sun 8 AMGood67120%10 mi61°nothing against it
Sun 9 AMGood56110%10 mi63°nothing against it
Sun 10 AMGood55100%10 mi65°nothing against it
Sun 11 AMGood55100%10 mi69°nothing against it
Sun 12 PMGood55110%10 mi71°nothing against it
Sun 1 PMGood67130%10 mi74°nothing against it
Sun 2 PMGood810150%10 mi76°nothing against it
Sun 3 PMGood911170%10 mi77°nothing against it
Sun 4 PMCaution1013190%10 mi77°gusts near or over your limit
Sun 5 PMCaution1013190%10 mi79°gusts near or over your limit
Sun 6 PMGood912180%10 mi77°nothing against it
Sun 7 PMNo-fly922280%10 mi75°gusts near or over your limit, wind at 400 ft near or over your limit, night: lighting and night training required (107.29)
Sun 8 PMNo-fly922280%10 mi77°gusts near or over your limit, wind at 400 ft near or over your limit, night: lighting and night training required (107.29)
Sun 9 PMNo-fly819260%10 mi75°gusts near or over your limit, wind at 400 ft near or over your limit, night: lighting and night training required (107.29)
Sun 10 PMNo-fly819250%10 mi75°gusts near or over your limit, wind at 400 ft near or over your limit, night: lighting and night training required (107.29)

Flight restrictions nearby

Reading the FAA’s temporary flight restrictions.

Flight restrictions on the map. TFRs are not the whole picture: controlled airspace around airports needs LAANC authorization. Check the FAA’s B4UFLY.

Wind at 400 ft is estimated from the 10 m forecast by the power law, with exponents for each Pasquill stability class (Irwin 1979, rural, as in EPA dispersion models; the class from wind, sun height and cloud, after Turner 1970); gusts keep the ground gust’s margin. Caution from three quarters of your limit; the default 24 mph is the wind resistance printed for common sub-250 g drones. 14 CFR 107.51: “The minimum flight visibility, as observed from the location of the control station must be no less than 3 statute miles” and at least “500 feet below the cloud”. 14 CFR 107.29: “No person may operate a small unmanned aircraft system during periods of civil twilight unless the small unmanned aircraft has lighted anti-collision lighting visible for at least 3 statute miles”; civil twilight is the 30 minutes before sunrise and after sunset, in Alaska the Air Almanac’s. Kp: SWPC’s scales say satellite navigation problems may occur at G3 (Kp 7) and navigation is “degraded for hours” at G4 (Kp 8); Kp 5 is the typical app warning. Typical limits, not rules: rain chance 30% caution and 60% no-fly, thunder 10% and 20%, below 0 °C caution and −10 °C no-fly, over 40 °C caution. Your drone’s manual and the airspace come first.

Spraying and field work

Worked out from the NWS hourly forecast

Hours fit for spraying, and the days dry enough for fieldwork and hay, read from this forecast’s wind, gusts, humidity, temperature and rain.

Spraying windows

  • Sat 11 PM to Sun 4 PM 17 hours, every hour within the rules
  • Sun 6 PM to Mon 4 AM 10 hours, every hour within the rules
  • Mon 9 AM to Tue 1 AM 16 hours, every hour within the rules
  • Tue 11 AM to Wed 1 AM 14 hours, every hour within the rules
  • Wed 10 AM to 11 PM 13 hours, every hour within the rules
  • Thu 10 AM to 3 PM 5 hours, every hour within the rules
  • Thu 6 PM to 9 PM 3 hours, every hour within the rules
  • Fri 4 PM to 7 PM 3 hours, every hour within the rules
Sat
Sun12 AM6 AM12 PM6 PM
Mon12 AM6 AM12 PM6 PM
Tue12 AM6 AM12 PM6 PM

Good Marginal No

Field days

DayDaytimeChance of rainRainLowest humidityStrongest windDry days in a rowHay drying
SundayDry0%0.00 in45%10 mph6 dGood
MondayDry0%0.00 in64%7 mph5 d
TuesdayDry1%0.00 in74%7 mph4 d
WednesdayDry4%0.00 in74%8 mph3 d
ThursdayDry8%0.00 in79%10 mph2 d
FridayDry14%0.00 in85%9 mph1 d
SaturdayShowers possible33%0.00 in88%9 mph

Spraying: sustained wind 3 to 10 mph, the range US extension services and most labels give; gusts no more than 15 mph (this page’s limit); delta T (air minus wet-bulb temperature) 2 to 8 °C preferred and 8 to 10 °C marginal, from GRDC guidance, with the wet bulb by Stull’s formula; no hour at a 30% chance of rain or 0.25 mm forecast during the rain-free time. Follow the product label, which overrides all of this. Field days: dry is no daytime hour at a 30% chance and under 1 mm all day, wet is 6 mm (0.25 in) or more; soil moisture is not in the forecast, so ground still wet from earlier rain is not accounted for. Hay drying marks a dry day with humidity down to 50% and a breeze of 5 mph or more.

Solunar times

Computed from the moon’s position

The best-rated day this week is Saturday, rated best.

DayRatingMajor periodsMinor periodsMoonSunrise, sunset
Sat Best11:44 PM to 1:44 AM12:07 PM to 2:07 PM6:32 AM to 7:32 AM6:34 PM to 7:34 PM 100%7:10 AM, 7:11 PM
Sun Best12:30 AM to 2:30 AM12:53 PM to 2:53 PM7:35 AM to 8:35 AM7:04 PM to 8:04 PM 99%7:11 AM, 7:09 PM
Mon Good1:18 AM to 3:18 AM1:43 PM to 3:43 PM8:42 AM to 9:42 AM7:38 PM to 8:38 PM 95%7:12 AM, 7:08 PM
Tue Fair2:10 AM to 4:10 AM2:37 PM to 4:37 PM9:51 AM to 10:51 AM8:17 PM to 9:17 PM 90%7:12 AM, 7:07 PM
Wed Poor3:06 AM to 5:06 AM3:35 PM to 5:35 PM11:02 AM to 12:02 PM9:05 PM to 10:05 PM 83%7:13 AM, 7:05 PM
Thu Fair4:06 AM to 6:06 AM4:37 PM to 6:37 PM12:12 PM to 1:12 PM10:00 PM to 11:00 PM 74%7:14 AM, 7:04 PM
Fri Fair5:08 AM to 7:08 AM5:40 PM to 7:40 PM1:17 PM to 2:17 PM11:04 PM to 12:04 AM 64%7:14 AM, 7:03 PM

Periods in bold fall within an hour of sunrise or sunset. The weather’s side is the fishing index

Major periods are two hours centered on the moon’s passage overhead and underfoot; minor periods are one hour centered on moonrise and moonset: the conventional durations of John Alden Knight’s solunar tables (1936). The rating is this site’s: one point to start, two more within a day and a half of a new or full moon (one more within three and a half days), and one more when a period falls within an hour of sunrise or sunset. The theory has mixed support in fisheries research; the times are exact astronomy.

In words

NWS forecast periods, as issued
  1. Tonight60° · NW 6 mph

    Mostly clear, with a low around 60. Northwest wind around 6 mph.

  2. Sunday80° · NW 5–10 mph

    Sunny, with a high near 80. Northwest wind 5 to 10 mph.

  3. Sunday Night67° · W 3–9 mph

    Mostly clear, with a low around 67. West wind 3 to 9 mph.

  4. Monday79° · NE 3–7 mph

    Sunny, with a high near 79. Northeast wind 3 to 7 mph.

  5. Monday Night72° · SW 1–7 mph

    Mostly clear, with a low around 72. Southwest wind 1 to 7 mph.

  6. Tuesday81° · 1% · E 1–7 mph

    Sunny, with a high near 81.

  7. Tuesday Night75° · 1% · SE 2–7 mph

    Clear, with a low around 75.

  8. Wednesday81° · 4% · SE 2–8 mph

    Sunny, with a high near 81.

  9. Wednesday Night76° · 4% · SE 3–8 mph

    Mostly clear, with a low around 76.

  10. Thursday81° · 8% · SE 2–10 mph

    Sunny, with a high near 81.

  11. Thursday Night76° · 8% · SE 3–9 mph

    Partly cloudy, with a low around 76.

  12. Friday82° · 14% · SE 3–9 mph

    Mostly sunny, with a high near 82.

  13. Friday Night77° · 14% · S 3–8 mph

    Partly cloudy, with a low around 77.

  14. Saturday81° · 33% · S 3–9 mph

    A slight chance of rain showers between 8am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 30%.

The forecaster’s discussion

NWS Charleston, SC · issued Sep 26, 10:44 PM EDT

Written by the forecaster on duty for their own colleagues and for anyone who wants to know why the forecast says what it says. It is not edited for the public, so it uses the office’s shorthand; it is also the most honest thing any weather service publishes.

What Has Changed

Key Message 1 and the Marine Section have been updated.

KEY Messages

1) The coastal flood risk will linger into early next week.

2) Rising temperatures through Tuesday, remaining above normal next week.

Discussion

KEY MESSAGE 1: The coastal flood risk will linger into early next week.

As a nor'easter churns offshore of the Eastern Seaboard, steady northerly flow will continue across the Lowcountry and southeast Georgia through the evening, before turning more west-northwesterly tonight. Even though this will create a less favorable environment for coastal flooding, the astro tide will still be elevated given the recent full moon. Thus, this will still result in minor (possible moderate) coastal flooding with each high tide cycle through early next week (esp. for the Charleston Harbor).

Charleston Harbor: Coastal flooding concerns will continue tomorrow (9/27) with the potential to reach moderate flood stage for Charleston and Colleton County with the morning high tide (~843 AM). Thereafter, it's likely to see minor coastal flooding conditions through early next week for the Charleston Harbor.

Fort Pulaski: Tidal levels could reach minor coastal flooding levels with tomorrow morning's high tide (~853 AM). Thereafter, coastal flooding is not expected for the week.

KEY MESSAGE 2: Rising temperatures through Tuesday, remaining above normal next week.

One last fall-like afternoon as the nor-easter continues to move into the northeast region, with rather tranquil conditions persisting for the next couple days over the southeast. Clear skies and light winds will set up another radiational cooling event tonight, with overnight lows in the lower to mid 50s for inland areas, and in the upper 50s to lower 60s for those along the coast.

Rising temperatures next week will be the main story, which will primarily be driven by the low-level (h925) thermal fields as ridging builds aloft into mid-week. Expect highs on Sunday primarily in the lower 80s, though areas south of the I-16 corridor will be in the mid 80s. Monday will be a touch warmer as the mid-80s build northwards and upper 80s become likely south of the I-16 corridor, with widespread mid 80s to lower 90s on Tuesday. Normally, high temperatures in the end of September are in the lower/mid 80s, falling into the upper 70s by the middle of October...so enjoy the warmer temperatures while you can? While warm temperatures remain, moisture returns Thursday into Friday along the backside of a subtropical high pressure centered well offshore over the Atlantic, bringing some low rain chances to return.

Aviation · 02Z Sunday Through Thursday

VFR conditions are expected to prevail at CHS/JZI/SAV terminals through 00Z Monday.

Extended Aviation Outlook: VFR.

Marine

Through Tonight: Winds will continue to decrease this evening, with seas similarly subsiding through midnight. After midnight, offshore winds should gust no higher than 10-15 kt, while seas range between 2-5 ft, largest across offshore GA waters.

Sunday through Thursday: Fairly tranquil marine conditions will be on tap through the period as high pressure becomes the dominant feature across the local waters. Lingering long-period swell associated with the departing nor'easter will continue to gradually diminish Sunday. Northwesterly flow around 5 to 10 kt on Sunday morning will gradually turn more west to southwest in the evening. Seas will generally range from 2 to 3 ft in the nearshore waters and 3 to 4 ft in the offshore waters. As high pressure shifts eastward on Tuesday and Wednesday, a weak coastal sea breeze circulation becomes more established. Expect winds to become more south to southeast on Tuesday and Wednesday as well.

Rip Currents: A lingering 10-12s backswell directed towards the Georgia and Florida coasts will support a moderate rip current risk from Tybee Island south to Sapelo Island through this evening and then again tomorrow. A low risk is anticipated for the lower South Carolina beaches both days.

CHS Watches / Warnings / Advisories

GA...None. SC...Coastal Flood Advisory until 11 PM EDT this evening for SCZ149- 150. MARINE...None.

The outlooks beyond

SPC, WPC, CPC and the Drought Monitor, read at this point

The national centers each publish a judgment the local grid does not carry. Read here at this exact coordinate.

Severe weather

  1. Day 1 · Sat Sep 26No risk area
  2. Day 2 · Sun Sep 27No risk area
  3. Day 3 · Mon Sep 28No risk area
  4. Day 4 · Tue Sep 29No risk area
  5. Day 5 · Wed Sep 30No risk area
  6. Day 6 · Thu Oct 1No risk area
  7. Day 7 · Fri Oct 2No risk area
  8. Day 8 · Sat Oct 3No risk area

Rainfall

  1. Day 1 · Sat Sep 26Under 0.01 in
  2. Day 2 · Sun Sep 27Under 0.01 in
  3. Day 3 · Mon Sep 28Under 0.01 in
  4. Day 4-5 · Sep 29–Sep 30Under 0.01 in
  5. Day 6-7 · Oct 1–Oct 20.01 in

The rainfall forecast on the map, days 1 to 7

Six to fourteen days

  1. Days 6–10 · Temperature50% chance above normalOct 2–Oct 6
  2. Days 6–10 · Precipitation40% chance above normalOct 2–Oct 6
  3. Days 8–14 · TemperatureNear normal most likelyOct 4–Oct 10
  4. Days 8–14 · Precipitation40% chance above normalOct 4–Oct 10

Drought

  1. Drought MonitorNo drought

Frost and climate

NOAA 1991-2020 normals, Charleston City

The last spring freeze (32°F) usually comes around February 4 and the first fall freeze around December 30: a growing season of about 321 days.

One fall in ten brings a freeze by December 2; one spring in ten still has one after March 4.

Climate of 32.77, -79.90: normals, records and every month

Everything else on the grid

NWS forecast grid · 29 elements

The forecast office edits about sixty fields for every cell of its grid. The common ones are above; these are the rest, as the daily extreme, for anyone who needs the mixing height, the fire danger or the swell.

ElementSatSunMonTueWedThuFriSat
Wet bulb globe temperature max68°73°76°78°80°80°80°
Heat index max78°79°78°79°84°84°86°86°
Chance of thunder max0%0%0%0%0%0%0%24%
Visibility min10 mi10 mi10 mi10 mi10 mi10 mi10 mi
Mixing height max3,600 ft3,900 ft3,100 ft
Transport wind max13 mph13 mph8 mph
Davis stability index max2222
Atmospheric dispersion index max565829
Low visibility risk max246
Stability max666

Against the record

NOAA GHCN · Charleston Exec (JZI) · 7.7 mi away

Each forecast day against the same calendar date at the nearest long-record station: the 1991 to 2020 normal, and the record high and low with the year they were set.

DayForecastNormalRecord highRecord low
Sat Sep 2679° / 60°81° / 71°91° (1986)51° (1940)
Sun Sep 2780° / 67°82° / 72°94° (1986)51° (1940)
Mon Sep 2879° / 72°83° / 71°93° (2017)54° (1947)
Tue Sep 2981° / 75°81° / 69°90° (1911)50° (1942)
Wed Sep 3081° / 76°79° / 68°94° (1904)50° (1967)
Thu Oct 181° / 76°79° / 67°90° (1959)48° (1920)
Fri Oct 282° / 77°79° / 67°93° (1986)51° (1920)
Sat Oct 381° / 76°79° / 68°91° (1919)44° (1974)

Sun and moon

DayCivil twilightSunriseSunsetCivil twilightDaylightMoon
Sat6:46 AM7:10 AM7:11 PM7:35 PM12 h 1 min Full moon · 100% lit
Sun6:47 AM7:11 AM7:09 PM7:34 PM11 h 58 min Waning gibbous · 99% lit
Mon6:47 AM7:12 AM7:08 PM7:33 PM11 h 56 min Waning gibbous · 95% lit
Tue6:48 AM7:12 AM7:07 PM7:31 PM11 h 55 min Waning gibbous · 90% lit
Wed6:49 AM7:13 AM7:05 PM7:30 PM11 h 52 min Waning gibbous · 83% lit
Thu6:49 AM7:14 AM7:04 PM7:29 PM11 h 50 min Waning gibbous · 74% lit
Fri6:50 AM7:14 AM7:03 PM7:27 PM11 h 49 min Waning gibbous · 64% lit
Sat6:51 AM7:15 AM7:01 PM7:26 PM11 h 46 min Last quarter · 54% lit

Forecast from the National Weather Service forecast grid at api.weather.gov, updated by the local office through the day; the written periods and hourly digest are the NWS’s own. Outlooks from the Storm Prediction Center, the Weather Prediction Center and the Climate Prediction Center via NOAA’s map services. Records and normals from NOAA’s Global Historical Climatology Network. Sun and moon computed here. Place names from GeoNames (CC BY 4.0).

What is here

Seven days
The high, the low, the chance and amount of rain and snow, the wind and the forecaster’s words for each day and night, from the National Weather Service grid for the exact cell your town sits in.
Hour by hour
Temperature, what it feels like, dew point, humidity, chance and amount of precipitation, wind and gusts, sky cover, the chance of thunder, pressure, visibility and ceiling, as a chart and as a table, with nights shaded.
Everything else on the grid
The office edits about sixty fields for every cell. The ones the mainstream forecast pages leave out are here as a daily table: HeatRisk, wet bulb globe temperature, lightning activity, mixing height, transport wind, the fire weather indices, and at the coast the waves and swell.
The discussion
The Area Forecast Discussion the forecaster wrote to explain the forecast, in their own words, with the specialist annexes folded away. Also the office’s hazardous weather outlook.
Beyond the week
The Storm Prediction Center’s severe weather category for each of the next eight days, the Weather Prediction Center’s rainfall forecast to day seven and its winter storm severity, and the Climate Prediction Center’s odds for days six to fourteen, all read at your coordinate.
Against the record
Each forecast day beside the same date at the nearest long-record station: the thirty-year normal and the record high and low with their years, so a forecast high that would break a record says so.
The next 90 days
The forecast as far as the grid, the National Blend and the global models reach, and the calendar after that: the normal and the record for every date, with the Climate Prediction Center’s lean for the weeks, the month and the season drawn over them. No made-up highs for a date three months out.

Common questions

Where does this forecast come from?

From the National Weather Service forecast grid published at api.weather.gov, the same grid the local forecast office edits through the day and the source of every forecast on weather.gov. The written periods, the hourly digest and the forecaster’s discussion are the NWS’s own products, shown as issued. Nothing here is a blend a website made.

How far ahead does it go?

The grid runs seven days ahead, hour by hour for the first days and in three to six hour steps after that. The National Blend of Models carries the days to eleven and the global models to sixteen. Beyond that the page carries the national centers’ outlooks, severe weather to day eight, rainfall to day seven, and the Climate Prediction Center’s odds for the coming weeks, month and season, over a ninety-day calendar of the normal and the record for each date. No forecast has skill day by day past about two weeks, and this page does not print one.

Why is this different from the app on my phone?

Most forecast apps show a blend of models chosen by the company that makes the app. This page shows the forecast the local National Weather Service office issues, edited by the forecasters who will also issue the warnings, and it shows all of it rather than the six numbers that fit on a phone. The discussion explains the reasoning, which no app carries.

What is a place’s address here?

Every town has its own page, such as /forecast/us/oklahoma/oklahoma-city/, and every day at a town has one too. A ZIP code typed into the search goes to the town it belongs to. Any coordinate at all can be looked up, and the page names the nearest town.

What the weather actually was · Open the live radar · Where the data comes from