Charleston climate

Charleston Weather in August

NOAA 1991-2020 normals for Cleveland Fltr Plt, 8.1 km from Charleston

Average highs run from 89°F on August 1 to 87°F on August 31, and lows from 68°F to 65°F. Normal precipitation for the month is 3.84 in over about 10 wet days.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Charleston, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
88°F
Average low
67°F
Precipitation
3.84 in
Record high
104°FAug 21, 1983
Record low
47°FAug 13, 1964
Chance of a freeze
0%
Days of 90°F or more
11.3
Daylight
13 h 54 min to 12 h 56 min
Cloud cover
53%
Humidity
69%
Dew point
65°F
Wind
3.1 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 189°F68°F98°F 201156°F 199338%0%
Aug 289°F68°F98°F 198756°F 196537%0%
Aug 389°F68°F101°F 201156°F 196537%0%
Aug 489°F68°F100°F 195755°F 199537%0%
Aug 589°F68°F98°F 201056°F 197437%0%
Aug 689°F68°F100°F 198056°F 196736%0%
Aug 789°F68°F102°F 198055°F 195736%0%
Aug 889°F68°F102°F 198053°F 200436%0%
Aug 989°F68°F103°F 198053°F 198936%0%
Aug 1089°F68°F103°F 198054°F 197635%0%
Aug 1189°F67°F98°F 195651°F 198935%0%
Aug 1289°F67°F97°F 195655°F 200835%0%
Aug 1389°F67°F100°F 199947°F 196435%0%
Aug 1489°F67°F98°F 195652°F 196434%0%
Aug 1589°F67°F99°F 200753°F 196734%0%
Aug 1689°F67°F101°F 200754°F 196334%0%
Aug 1789°F67°F99°F 199954°F 197934%0%
Aug 1889°F67°F97°F 199955°F 196433%0%
Aug 1988°F67°F99°F 195654°F 199233%0%
Aug 2088°F67°F100°F 198352°F 197633%0%
Aug 2188°F67°F104°F 198355°F 200132%0%
Aug 2288°F66°F103°F 198353°F 195632%0%
Aug 2388°F66°F101°F 196852°F 199732%0%
Aug 2488°F66°F101°F 200751°F 199731%0%
Aug 2588°F66°F98°F 201152°F 196431%0%
Aug 2688°F66°F97°F 201154°F 195831%0%
Aug 2788°F66°F95°F 197551°F 202531%0%
Aug 2887°F66°F95°F 199051°F 202530%0%
Aug 2987°F65°F96°F 199347°F 196830%0%
Aug 3087°F65°F95°F 199350°F 196830%0%
Aug 3187°F65°F96°F 199349°F 196830%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Charleston, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

August 1
sunrise 6:48 AM, sunset 8:42 PM
August 31
sunrise 7:11 AM, sunset 8:07 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00401808 (Cleveland Fltr Plt), public domain. Records: NOAA GHCN-Daily, station USC00401808, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.