Current weather · Sep 20, 9:17 AM EDT
Alliston, Canada
51°
- High
- 66°
- Low
- 47°
- Precip today
- 0.00 in
- Sunrise
- 7:04 AM
- Sunset
- 7:20 PM
Hour by hour
MET Norway, hourly to about 60 hours, then every six hoursScroll sideways for more hours. Pick an hour for every number.
Every hour as a table48 hours
| Time | Weather | Temperature | Feels like | Dew point | Humidity | Chance | Amount | Snow | Dir | Wind | Gust | Sky cover | Thunder | Pressure | Visibility | Ceiling |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sun 9 AM | 51° | 51° | 47° | 85% | — | NW | 4 mph | 99% | 30.02 inHg | — | ||||||
| Sun 10 AM | 55° | 54° | 48° | 77% | — | NNW | 4 mph | 98% | 30.02 inHg | — | ||||||
| Sun 11 AM | 59° | 59° | 45° | 59% | — | N | 6 mph | 99% | 30.03 inHg | — | ||||||
| Sun 12 PM | 60° | 60° | 44° | 54% | — | N | 6 mph | 85% | 30.03 inHg | — | ||||||
| Sun 1 PM | 64° | 64° | 44° | 48% | — | NNE | 6 mph | 98% | 30.02 inHg | — | ||||||
| Sun 2 PM | 65° | 65° | 46° | 49% | — | N | 6 mph | 99% | 30.02 inHg | — | ||||||
| Sun 3 PM | 66° | 66° | 49° | 55% | — | NNW | 8 mph | 100% | 30.02 inHg | — | ||||||
| Sun 4 PM | 65° | 65° | 51° | 61% | — | NNW | 11 mph | 99% | 30.02 inHg | — | ||||||
| Sun 5 PM | 63° | 63° | 53° | 69% | — | NNW | 12 mph | 98% | 30.03 inHg | — | ||||||
| Sun 6 PM | 62° | 62° | 53° | 73% | — | NNW | 11 mph | 98% | 30.03 inHg | — | ||||||
| Sun 7 PM | 60° | 60° | 54° | 80% | — | NNW | 9 mph | 100% | 30.04 inHg | — | ||||||
| Sun 8 PM | 58° | 56° | 53° | 85% | — | NNW | 9 mph | 49% | 30.05 inHg | — | ||||||
| Sun 9 PM | 56° | 54° | 53° | 87% | — | NNW | 11 mph | 89% | 30.07 inHg | — | ||||||
| Sun 10 PM | 56° | 54° | 51° | 82% | — | N | 10 mph | 39% | 30.11 inHg | — | ||||||
| Sun 11 PM | 54° | 52° | 50° | 84% | — | N | 8 mph | 47% | 30.14 inHg | — | ||||||
| Mon 12 AM | 53° | 50° | 49° | 86% | — | N | 8 mph | 88% | 30.16 inHg | — | ||||||
| Mon 1 AM | 52° | 49° | 48° | 84% | — | N | 8 mph | 93% | 30.17 inHg | — | ||||||
| Mon 2 AM | 51° | 48° | 47° | 86% | — | N | 8 mph | 98% | 30.19 inHg | — | ||||||
| Mon 3 AM | 50° | 46° | 46° | 89% | — | N | 7 mph | 99% | 30.20 inHg | — | ||||||
| Mon 4 AM | 48° | 45° | 46° | 90% | — | N | 7 mph | 98% | 30.21 inHg | — | ||||||
| Mon 5 AM | 47° | 43° | 44° | 91% | — | N | 7 mph | 88% | 30.22 inHg | — | ||||||
| Mon 6 AM | 46° | 42° | 43° | 89% | — | NNE | 8 mph | 84% | 30.24 inHg | — | ||||||
| Mon 7 AM | 46° | 41° | 42° | 86% | — | NNE | 9 mph | 98% | 30.25 inHg | — | ||||||
| Mon 8 AM | 47° | 42° | 41° | 80% | — | NNE | 9 mph | 100% | 30.27 inHg | — | ||||||
| Mon 9 AM | 49° | 45° | 40° | 71% | — | NE | 10 mph | 100% | 30.28 inHg | — | ||||||
| Mon 10 AM | 50° | 46° | 39° | 66% | — | NE | 10 mph | 99% | 30.29 inHg | — | ||||||
| Mon 11 AM | 52° | 49° | 40° | 62% | — | NE | 9 mph | 98% | 30.30 inHg | — | ||||||
| Mon 12 PM | 54° | 51° | 40° | 60% | — | NE | 9 mph | 100% | 30.29 inHg | — | ||||||
| Mon 1 PM | 55° | 53° | 41° | 58% | — | NE | 9 mph | 100% | 30.28 inHg | — | ||||||
| Mon 2 PM | 56° | 54° | 41° | 56% | — | NE | 9 mph | 100% | 30.27 inHg | — | ||||||
| Mon 3 PM | 57° | 55° | 41° | 55% | — | NE | 9 mph | 96% | 30.25 inHg | — | ||||||
| Mon 4 PM | 57° | 55° | 41° | 54% | — | ENE | 9 mph | 76% | 30.24 inHg | — | ||||||
| Mon 5 PM | 57° | 55° | 41° | 54% | — | ENE | 9 mph | 84% | 30.23 inHg | — | ||||||
| Mon 6 PM | 56° | 55° | 41° | 57% | — | ENE | 8 mph | 74% | 30.23 inHg | — | ||||||
| Mon 7 PM | 53° | 52° | 44° | 72% | — | NE | 4 mph | 56% | 30.23 inHg | — | ||||||
| Mon 8 PM | 50° | 49° | 43° | 77% | — | NE | 4 mph | 84% | 30.25 inHg | — | ||||||
| Mon 9 PM | 49° | 48° | 43° | 80% | — | NNE | 5 mph | 82% | 30.27 inHg | — | ||||||
| Mon 10 PM | 49° | 46° | 43° | 82% | — | NE | 6 mph | 100% | 30.28 inHg | — | ||||||
| Mon 11 PM | 49° | 46° | 43° | 79% | — | ENE | 7 mph | 96% | 30.30 inHg | — | ||||||
| Tue 12 AM | 49° | 45° | 42° | 79% | — | ENE | 8 mph | 90% | 30.30 inHg | — | ||||||
| Tue 1 AM | 48° | 45° | 42° | 80% | — | ENE | 6 mph | 93% | 30.32 inHg | — | ||||||
| Tue 2 AM | 47° | 44° | 42° | 83% | — | ENE | 6 mph | 98% | 30.32 inHg | — | ||||||
| Tue 3 AM | 47° | 44° | 43° | 85% | — | NE | 6 mph | 99% | 30.33 inHg | — | ||||||
| Tue 4 AM | 47° | 44° | 42° | 85% | — | NE | 6 mph | 100% | 30.35 inHg | — | ||||||
| Tue 5 AM | 46° | 42° | 42° | 86% | — | NE | 6 mph | 73% | 30.35 inHg | — | ||||||
| Tue 6 AM | 44° | 40° | 41° | 88% | — | NE | 7 mph | 6% | 30.35 inHg | — | ||||||
| Tue 7 AM | 43° | 39° | 40° | 90% | — | NNE | 6 mph | 3% | 30.37 inHg | — | ||||||
| Tue 8 AM | 45° | 41° | 42° | 87% | — | NNE | 7 mph | 7% | 30.39 inHg | — |
The next 16 days
MET Norway forecast updated Sep 20, 7:19 AM EDT to day 10, the mean of GFS, ECMWF, ECMWF AI to day 16- TodaySep 2066°47°Cloudywind 12 mph
- MonSep 2157°46°Partly cloudywind 10 mph
- TueSep 2260°46°Mostly clearwind 10 mph
- WedSep 2364°46°Partly cloudywind 9 mph
- ThuSep 2465°46°Clearwind 6 mph
- FriSep 2565°47°Partly cloudywind 5 mph
- SatSep 2667°53°Partly cloudywind 7 mph
- SunSep 2768°52°Cloudywind 7 mph
- MonSep 2870°52°Cloudywind 7 mph
- TueSep 2966°62°Cloudywind 7 mph
- WedSep 30~67°52°Model mean
- ThuOct 1~60°50°Model mean
- FriOct 2~63°47°Model mean
- SatOct 3~63°45°Model mean
- SunOct 4~68°51°Model mean
- MonOct 5~76°58°Model mean
Right now
MET Norway forecast for this hour- Feels like51°
- WindNW 4 mph
- Humidity85%
- Dew point47°
- Pressure30.02 inHg
- UV index1 · Lowclear-sky peak 6 today
- Sunrise and sunsetSunrise · Sunset
- Moonrise4:39 PMMoonset 12:17 AM
- Moon phaseWaxing gibbous65% lit
The models, side by side
HRRR Sep 20, 2:00 AM EDT · GFS Sep 20, 2:00 AM EDT · GEFS Sep 20, 2:00 AM EDT · ECMWF Sep 19, 8:00 PM EDT · ECMWF AI Sep 19, 8:00 PM EDTEach 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.
| Day | NWS grid | HRRR | GFS | GEFS | ECMWF | ECMWF AI |
|---|---|---|---|---|---|---|
| Today Sep 20 | 66° 47° | 66° 47° | 69° 47° | 68° 48° | 65° 48° | ~64° 47° |
| Mon Sep 21 | 57° 46° | 55° 42° | 57° 41° | 58° 39° | 57° 48° | ~56° 46° |
| Tue Sep 22 | 60° 46° | ~44° 41° | 64° 42° | 62° 38° | 60° 47° | ~61° 42° |
| Wed Sep 23 | 64° 46° | — | 66° 42° | 64° 41° | 63° 46° | ~65° 45° |
| Thu Sep 24 | 65° 46° | — | 67° 43° | 64° 44° | 64° 46° | ~66° 45° |
| Fri Sep 25 | 65° 47° | — | 70° 44° | 67° 43° | 65° 44° | ~66° 42° |
| Sat Sep 26 | 67° 53° | — | 73° 44° | 69° 46° | ~67° 45° | ~69° 47° |
| Sun Sep 27 | 68° 52° | — | 70° 51° | 71° 47° | ~68° 50° | ~70° 51°0.03 in |
| Mon Sep 28 | 70° 52° | — | 67° 46° | 71° 49° | ~59° 53° | ~64° 56°0.04 in |
| Tue Sep 29 | 66° 62° | — | 72° 47° | 67° 50°0.01 in | ~66° 52° | ~67° 55°0.02 in |
| Wed Sep 30 | — | — | ~57° 47°0.07 in | ~51° 51° | ~74° 56° | ~69° 55°0.13 in |
| Thu Oct 1 | — | — | ~53° 43° | — | ~71° 55° | ~57° 51°0.05 in |
| Fri Oct 2 | — | — | ~58° 38° | — | ~68° 52° | ~62° 50°0.02 in |
| Sat Oct 3 | — | — | ~59° 39° | — | ~68° 47° | ~63° 48° |
| Sun Oct 4 | — | — | ~74° 44° | — | ~70° 61°0.41 in | ~59° 49°0.22 in |
| Mon Oct 5 | — | — | ~76° 58°0.06 in | — | — | — |
A ~ marks a high or low read from six-hourly steps, which miss the true extreme by a degree or two.
The next 90 days
NOAA GHCN normals and records at Niagara Falls International (IAG) · Climate Prediction Center outlooksNo 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 Mon Oct 5, from MET Norway, then the mean of the global models. Beyond it the lines are the calendar.
Forecast high and lowNormal high and lowRecord high and low
| Week of | Normal | Warmest on record | Coldest on record | Temperature lean | Precipitation lean |
|---|---|---|---|---|---|
| Sep 20 | 73° / 51° | 93° (2017) | 32° (1963) | no outlook | no outlook |
| Sep 27 | — | 89° (2017) | 30° (1957) | no outlook | no outlook |
| Oct 4 | 66° / 46° | 85° (2023) | 26° (2001) | no outlook | no outlook |
| Oct 11 | 62° / 44° | 81° (2021) | 26° (2012) | no outlook | no outlook |
| Oct 18 | 58° / 43° | 79° (2016) | 26° (2002) | no outlook | no outlook |
| Oct 25 | 52° / 38° | 78° (2012) | 23° (1952) | no outlook | no outlook |
| Nov 1 | 53° / 36° | 80° (2022) | -2° (1951) | no outlook | no outlook |
| Nov 8 | 51° / 33° | 75° (2020) | 11° (2019) | no outlook | no outlook |
| Nov 15 | 47° / 31° | 72° (2016) | 13° (2014) | no outlook | no outlook |
| Nov 22 | 46° / 33° | 69° (2003) | 9° (2018) | no outlook | no outlook |
| Nov 29 | 40° / 28° | 68° (2005) | -2° (2002) | no outlook | no outlook |
| Dec 6 | 39° / 27° | 66° (2001) | 2° (1968) | no outlook | no outlook |
| Dec 13 | 35° / 23° | 72° (2015) | -3° (2005) | no outlook | no outlook |
Health and activities
Rules of thumb over the next 24 hours of forecast, the warnings in force, the station’s report, air quality and pollenNone 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.
Each rating says which span it is for: the rest of today’s daylight, tonight, or the next 24 hours.
Health
- Arthritisnext 24 hVery highpressure swing
- Sinus pressurenext 24 hHighpressure swing
- Common coldtodayLowmild
- FlutodayLowmild
- Migrainenext 24 hHighpressure swing
- Asthmanext 24 hLowclean air
- Heat stresstodayLowmild
- SunburntodayLowweak sun
- Frostbitenext 24 hLowmild
- SleepingtonightIdealcool, quiet night
Outdoors
- RunningtodayIdealfine conditions
- HikingtodayIdealfine conditions
- BikingtodayIdealfine conditions
- GolftodayIdealfine conditions
- FishingtodayGoodpressure swing
- Boating and paddlingtodayIdealfine conditions
- Beach and pooltodayFaircool
- CampingtonightIdealfine conditions
- StargazingtonightPoormostly cloudy
Travel
- Air travelnext 24 hIdealclear skies
- Drivingnext 24 hIdealclear roads
Home and garden
- Lawn mowingtodayIdealfine conditions
- GardeningtodayIdealfine conditions
- Outdoor entertainingtodayIdealfine conditions
- Drying laundry outsidetodayGoodlittle sun
- Painting and outdoor projectstodayIdealfine conditions
- FrosttonightLowmild
Pests
- MosquitoestodayHighwarm
- TickstodayHighwarm
- Indoor pestsnext 24 hHighcool nights, warm days
- Outdoor peststodayModeratewarm
In words
Written here from the MET Norway forecastToday66° · NNW 4–12 mph
Cloudy. High near 19°C. Northnorthwest wind 6 to 19 km/h.
Tonight47° · N 7–11 mph
Cloudy. Low near 8°C. North wind 12 to 18 km/h.
Monday57° · NE 8–10 mph
Partly cloudy. High near 14°C. Northeast wind 13 to 16 km/h.
Monday Night46° · NE 4–8 mph
Partly cloudy. Low near 8°C. Northeast wind 6 to 13 km/h.
Tuesday60° · NE 6–11 mph
Mostly clear. High near 16°C. Northeast wind 10 to 17 km/h.
Tuesday Night46° · NE 5–8 mph
Clear. Low near 8°C. Northeast wind 8 to 13 km/h.
Wednesday64° · ENE 3–9 mph
Partly cloudy. High near 18°C. Eastnortheast wind 5 to 14 km/h.
Wednesday Night46° · E 3–6 mph
Clear. Low near 8°C. East wind 5 to 9 km/h.
Thursday65° · E 2–5 mph
Clear. High near 18°C. East wind 3 to 8 km/h.
Thursday Night46° · NNW 1–2 mph
Clear. Low near 8°C. Northnorthwest wind 1 to 4 km/h.
Friday65° · NNW 2–4 mph
Partly cloudy. High near 18°C. Northnorthwest wind 4 to 7 km/h.
Friday Night47° · NNW 2–6 mph
Cloudy. Low near 9°C. Northnorthwest wind 4 to 9 km/h.
Saturday67° · NNW 2–6 mph
Partly cloudy. High near 19°C. Northnorthwest wind 4 to 9 km/h.
Saturday Night53° · NW 4–7 mph
Cloudy. Low near 12°C. Northwest wind 6 to 11 km/h.
Sunday68° · N 6 mph
Cloudy. High near 20°C. North wind around 9 km/h.
Sunday Night52° · NW 3–7 mph
Cloudy. Low near 11°C. Northwest wind 5 to 12 km/h.
Monday70° · N 5–7 mph
Cloudy. High near 21°C. North wind 8 to 12 km/h.
Monday Night52° · NE 2–6 mph
Cloudy. Low near 11°C. Northeast wind 3 to 10 km/h.
Tuesday66° · SSE 2–6 mph
Cloudy. High near 19°C. Southsoutheast wind 4 to 9 km/h.
Tuesday Night62° · SSE 7 mph
No forecast. Low near 17°C. Southsoutheast wind around 11 km/h.
Everything else on the grid
MET Norway · 12 elementsThe 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.
| Element | Sun | Mon | Tue | Wed | Thu | Fri | Sat | Sun | Mon | Tue |
|---|---|---|---|---|---|---|---|---|---|---|
| Pressure min | 30.01 inHg | 30.16 inHg | 30.30 inHg | 30.40 inHg | 30.41 inHg | 30.28 inHg | 30.12 inHg | 30.00 inHg | 29.96 inHg | 29.90 inHg |
Against the record
NOAA GHCN · Niagara Falls International (IAG) · 85 mi awayEach 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.
| Day | Forecast | Normal | Record high | Record low |
|---|---|---|---|---|
| Sun Sep 20 | 66° / 47° | 74° / 52° | 86° (2002) | 35° (1956) |
| Mon Sep 21 | 57° / 46° | 76° / 52° | 88° (2018) | 38° (1956) |
| Tue Sep 22 | 60° / 46° | 73° / 52° | 85° (2016) | 39° (2020) |
| Wed Sep 23 | 64° / 46° | 73° / 51° | 90° (2017) | 38° (1963) |
| Thu Sep 24 | 65° / 46° | 74° / 50° | 93° (2017) | 32° (1963) |
| Fri Sep 25 | 65° / 47° | 73° / 52° | 93° (2017) | 39° (2013) |
| Sat Sep 26 | 67° / 53° | 72° / 51° | 91° (2017) | 38° (1957) |
| Sun Sep 27 | 68° / 52° | 71° / 52° | 89° (2017) | 35° (1957) |
| Mon Sep 28 | 70° / 52° | 70° / 52° | 87° (1959) | 30° (1957) |
| Tue Sep 29 | 66° / 62° | 66° / 48° | 85° (1954) | 34° (1951) |
Sun and moon
| Day | Civil twilight | Sunrise | Sunset | Civil twilight | Daylight | Moon |
|---|---|---|---|---|---|---|
| Sun | 6:36 AM | 7:04 AM | 7:20 PM | 7:49 PM | 12 h 16 min | Waxing gibbous · 65% lit |
| Mon | 6:37 AM | 7:06 AM | 7:19 PM | 7:47 PM | 12 h 13 min | Waxing gibbous · 75% lit |
| Tue | 6:38 AM | 7:07 AM | 7:17 PM | 7:46 PM | 12 h 10 min | Waxing gibbous · 83% lit |
| Wed | 6:39 AM | 7:08 AM | 7:15 PM | 7:44 PM | 12 h 7 min | Waxing gibbous · 90% lit |
| Thu | 6:40 AM | 7:09 AM | 7:13 PM | 7:42 PM | 12 h 4 min | Waxing gibbous · 96% lit |
| Fri | 6:41 AM | 7:10 AM | 7:11 PM | 7:40 PM | 12 h 1 min | Waxing gibbous · 99% lit |
| Sat | 6:43 AM | 7:11 AM | 7:09 PM | 7:38 PM | 11 h 58 min | Full moon · 100% lit |
| Sun | 6:44 AM | 7:13 AM | 7:07 PM | 7:36 PM | 11 h 54 min | Waning gibbous · 99% lit |
| Mon | 6:45 AM | 7:14 AM | 7:06 PM | 7:34 PM | 11 h 52 min | Waning gibbous · 95% lit |
| Tue | 6:46 AM | 7:15 AM | 7:04 PM | 7:33 PM | 11 h 49 min | Waning gibbous · 90% lit |
Forecast from MET Norway’s Locationforecast (the Norwegian Meteorological Institute, CC BY 4.0), built on the ECMWF model and refined by MET, updated through the day; the written periods are composed here from its hourly data. Global model lines from NOAA’s GFS and ECMWF’s open data where they are ingested. 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