Current weather · Sep 21, 2:47 AM EDT
Thornhill, Canada
54°
- High
- 59°
- Low
- 51°
- Precip today
- 0.00 in
- Sunrise
- 7:04 AM
- Sunset
- 7:17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mon 2 AM | 54° | 50° | 46° | 76% | — | NNE | 12 mph | 100% | 30.16 inHg | — | ||||||
| Mon 3 AM | 53° | 49° | 45° | 76% | — | NNE | 11 mph | 99% | 30.18 inHg | — | ||||||
| Mon 4 AM | 51° | 47° | 44° | 76% | — | NNE | 11 mph | 100% | 30.18 inHg | — | ||||||
| Mon 5 AM | 51° | 47° | 43° | 75% | — | NNE | 11 mph | 100% | 30.20 inHg | — | ||||||
| Mon 6 AM | 49° | 45° | 42° | 77% | — | NNE | 11 mph | 100% | 30.21 inHg | — | ||||||
| Mon 7 AM | 49° | 44° | 42° | 76% | — | NNE | 11 mph | 100% | 30.24 inHg | — | ||||||
| Mon 8 AM | 48° | 44° | 41° | 74% | — | NNE | 11 mph | 100% | 30.26 inHg | — | ||||||
| Mon 9 AM | 49° | 45° | 39° | 69% | — | NE | 11 mph | 100% | 30.27 inHg | — | ||||||
| Mon 10 AM | 51° | 47° | 39° | 64% | — | NE | 11 mph | 99% | 30.28 inHg | — | ||||||
| Mon 11 AM | 54° | 50° | 39° | 58% | — | NE | 11 mph | 100% | 30.28 inHg | — | ||||||
| Mon 12 PM | 56° | 53° | 39° | 53% | — | ENE | 9 mph | 100% | 30.27 inHg | — | ||||||
| Mon 1 PM | 57° | 55° | 39° | 52% | — | ENE | 9 mph | 91% | 30.26 inHg | — | ||||||
| Mon 2 PM | 58° | 56° | 40° | 51% | — | ENE | 9 mph | 59% | 30.24 inHg | — | ||||||
| Mon 3 PM | 59° | 59° | 41° | 50% | — | ENE | 9 mph | 95% | 30.23 inHg | — | ||||||
| Mon 4 PM | 59° | 59° | 41° | 51% | — | ENE | 9 mph | 98% | 30.22 inHg | — | ||||||
| Mon 5 PM | 59° | 59° | 41° | 51% | — | ENE | 8 mph | 100% | 30.23 inHg | — | ||||||
| Mon 6 PM | 58° | 57° | 41° | 53% | — | ENE | 9 mph | 100% | 30.22 inHg | — | ||||||
| Mon 7 PM | 57° | 55° | 42° | 57% | — | NE | 8 mph | 100% | 30.23 inHg | — | ||||||
| Mon 8 PM | 56° | 54° | 43° | 62% | — | NE | 8 mph | 100% | 30.24 inHg | — | ||||||
| Mon 9 PM | 55° | 52° | 43° | 65% | — | NE | 10 mph | 100% | 30.26 inHg | — | ||||||
| Mon 10 PM | 53° | 50° | 42° | 66% | — | NE | 11 mph | 96% | 30.28 inHg | — | ||||||
| Mon 11 PM | 52° | 48° | 42° | 68% | — | NNE | 11 mph | 100% | 30.29 inHg | — | ||||||
| Tue 12 AM | 51° | 47° | 40° | 67% | — | NE | 12 mph | 74% | 30.29 inHg | — | ||||||
| Tue 1 AM | 50° | 45° | 40° | 69% | — | NE | 12 mph | 11% | 30.30 inHg | — | ||||||
| Tue 2 AM | 48° | 44° | 40° | 72% | — | NE | 11 mph | 14% | 30.32 inHg | — | ||||||
| Tue 3 AM | 47° | 42° | 39° | 75% | — | NNE | 10 mph | 7% | 30.33 inHg | — | ||||||
| Tue 4 AM | 46° | 41° | 39° | 75% | — | NNE | 10 mph | 13% | 30.33 inHg | — | ||||||
| Tue 5 AM | 46° | 41° | 38° | 76% | — | NE | 10 mph | 51% | 30.34 inHg | — | ||||||
| Tue 6 AM | 45° | 40° | 38° | 75% | — | NNE | 10 mph | 81% | 30.35 inHg | — | ||||||
| Tue 7 AM | 45° | 40° | 38° | 75% | — | NNE | 10 mph | 2% | 30.36 inHg | — | ||||||
| Tue 8 AM | 46° | 41° | 38° | 73% | — | NE | 11 mph | 1% | 30.38 inHg | — | ||||||
| Tue 9 AM | 50° | 45° | 40° | 68% | — | NNE | 11 mph | 1% | 30.38 inHg | — | ||||||
| Tue 10 AM | 54° | 50° | 40° | 59% | — | NE | 12 mph | 3% | 30.38 inHg | — | ||||||
| Tue 11 AM | 57° | 54° | 39° | 51% | — | ENE | 13 mph | 2% | 30.39 inHg | — | ||||||
| Tue 12 PM | 59° | 59° | 39° | 46% | — | ENE | 14 mph | 0% | 30.40 inHg | — | ||||||
| Tue 1 PM | 61° | 61° | 39° | 44% | — | E | 14 mph | 0% | 30.40 inHg | — | ||||||
| Tue 2 PM | 62° | 62° | 40° | 44% | — | E | 13 mph | 0% | 30.39 inHg | — | ||||||
| Tue 3 PM | 62° | 62° | 41° | 45% | — | E | 12 mph | 0% | 30.37 inHg | — | ||||||
| Tue 4 PM | 62° | 62° | 42° | 46% | — | E | 12 mph | 2% | 30.36 inHg | — | ||||||
| Tue 5 PM | 62° | 62° | 42° | 48% | — | E | 11 mph | 6% | 30.37 inHg | — | ||||||
| Tue 6 PM | 60° | 60° | 42° | 52% | — | E | 11 mph | 4% | 30.37 inHg | — | ||||||
| Tue 7 PM | 58° | 56° | 43° | 58% | — | E | 9 mph | 2% | 30.39 inHg | — | ||||||
| Tue 8 PM | 56° | 53° | 43° | 63% | — | ENE | 10 mph | 1% | 30.40 inHg | — | ||||||
| Tue 9 PM | 55° | 52° | 42° | 62% | — | ENE | 11 mph | 0% | 30.42 inHg | — | ||||||
| Tue 10 PM | 54° | 50° | 42° | 64% | — | ENE | 12 mph | 4% | 30.44 inHg | — | ||||||
| Tue 11 PM | 53° | 49° | 42° | 65% | — | ENE | 12 mph | 13% | 30.45 inHg | — | ||||||
| Wed 12 AM | 51° | 47° | 41° | 69% | — | NE | 11 mph | 18% | 30.45 inHg | — | ||||||
| Wed 1 AM | 50° | 45° | 41° | 71% | — | NE | 11 mph | 23% | 30.46 inHg | — |
The next 16 days
MET Norway forecast updated Sep 21, 1:17 AM EDT to day 10, the mean of GFS, ECMWF AI, ECMWF to day 16- TodaySep 2159°51°Cloudywind 12 mph
- TueSep 2262°48°Partly cloudywind 14 mph
- WedSep 2363°52°Mostly clearwind 13 mph
- ThuSep 2463°51°Mostly clearwind 9 mph
- FriSep 2567°55°Clearwind 7 mph
- SatSep 2670°55°Cloudywind 9 mph
- SunSep 2772°58°Clearwind 9 mph
- MonSep 2870°59°Clearwind 6 mph
- TueSep 2966°62°Cloudywind 10 mph
- WedSep 3061°61°No forecastwind 8 mph
- ThuOct 1~67°51°Model mean
- FriOct 2~68°59°Model mean
- SatOct 3~68°57°Model mean
- SunOct 4~69°54°Model mean
- MonOct 5~70°57°Model mean
- TueOct 6~61°55°Model mean
Right now
MET Norway forecast for this hour- Feels like50°
- WindNNE 12 mph
- Humidity76%
- Dew point46°
- Pressure30.16 inHg
- UV index0 · Lowclear-sky peak 6 today
- Sunrise and sunsetSunrise · Sunset · not yet up
- Moonrise5:07 PMMoonset 1:20 AM
- Moon phaseWaxing gibbous75% lit
The models, side by side
HRRR Sep 20, 8:00 PM EDT · GFS Sep 20, 8:00 PM EDT · GEFS Sep 20, 8:00 PM EDT · ECMWF Sep 20, 8:00 AM EDT · ECMWF AI Sep 20, 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 21 | 59° 51° | 61° 48° | 61° 48° | 60° 47° | ~60° 53° | ~58° 49° |
| Tue Sep 22 | 62° 48° | 63° 42° | 63° 49° | 62° 47° | 62° 47° | ~61° 47° |
| Wed Sep 23 | 63° 52° | — | 64° 50° | 63° 51° | 63° 49° | ~64° 50° |
| Thu Sep 24 | 63° 51° | — | 65° 53° | 63° 55° | 63° 52° | ~65° 49° |
| Fri Sep 25 | 67° 55° | — | 71° 50° | 70° 51° | 67° 48° | ~69° 44° |
| Sat Sep 26 | 70° 55° | — | 74° 52° | 71° 54° | ~71° 54° | ~73° 49° |
| Sun Sep 27 | 72° 58° | — | 74° 54° | 70° 55° | ~72° 53° | ~74° 54° |
| Mon Sep 28 | 70° 59° | — | 68° 58° | 71° 56° | ~71° 60° | ~69° 56° |
| Tue Sep 29 | 66° 62° | — | 71° 58° | 70° 56° | ~67° 60° | ~70° 53° |
| Wed Sep 30 | 61° 61°0.02 in | — | 68° 60°0.19 in | 68° 57°0.04 in | ~71° 62°0.02 in | ~76° 56° |
| Thu Oct 1 | — | — | ~67° 51° | — | ~67° 64°0.31 in | ~67° 50°0.03 in |
| Fri Oct 2 | — | — | ~71° 54° | — | ~63° 61°2.16 in | ~70° 61°0.22 in |
| Sat Oct 3 | — | — | ~65° 59° | — | ~68° 62°0.29 in | ~69° 50° |
| Sun Oct 4 | — | — | ~67° 58° | — | ~72° 56°0.09 in | ~67° 47°0.06 in |
| Mon Oct 5 | — | — | ~71° 56°0.18 in | — | ~61° 60° | ~69° 59°0.54 in |
| Tue Oct 6 | — | — | ~61° 55°0.02 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 Tue Oct 6, 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 21 | 74° / 50° | 93° (2017) | 32° (1963) | no outlook | no outlook |
| Sep 28 | 66° / 49° | 87° (1959) | 30° (1957) | no outlook | no outlook |
| Oct 5 | 66° / 44° | 85° (2007) | 26° (2001) | no outlook | no outlook |
| Oct 12 | 62° / 42° | 80° (2021) | 26° (2012) | no outlook | no outlook |
| Oct 19 | 55° / 42° | 79° (1963) | 24° (2002) | no outlook | no outlook |
| Oct 26 | 52° / 38° | 78° (2024) | 23° (1952) | no outlook | no outlook |
| Nov 2 | 55° / 38° | 80° (2022) | -2° (1951) | no outlook | no outlook |
| Nov 9 | 49° / 33° | 75° (2020) | 11° (2019) | no outlook | no outlook |
| Nov 16 | 49° / 32° | 72° (2016) | 9° (2018) | no outlook | no outlook |
| Nov 23 | 45° / 34° | 69° (2003) | 7° (2013) | no outlook | no outlook |
| Nov 30 | 41° / 27° | 66° (2001) | -2° (2002) | no outlook | no outlook |
| Dec 7 | 40° / 27° | 61° (1951) | -3° (2005) | no outlook | no outlook |
| Dec 14 | 35° / 23° | 72° (2015) | -0° (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 hModeratepressure swing
- Sinus pressurenext 24 hModeratepressure swing
- Common coldtodayLowmild
- FlutodayLowmild
- Migrainenext 24 hLowsteady conditions
- Asthmanext 24 hLowclean air
- Heat stresstodayLowmild
- SunburntodayLowweak sun
- Frostbitenext 24 hLowmild
- SleepingtonightIdealcool, quiet night
Outdoors
- RunningtodayIdealfine conditions
- HikingtodayIdealfine conditions
- BikingtodayIdealfine conditions
- GolftodayIdealfine conditions
- FishingtodayIdealfine conditions
- Boating and paddlingtodayIdealfine conditions
- Beach and pooltodayPoorcool
- CampingtonightIdealfine conditions
- StargazingtonightPoorovercast
Travel
- Air travelnext 24 hIdealclear skies
- Drivingnext 24 hIdealclear roads
Home and garden
- Lawn mowingtodayIdealfine conditions
- GardeningtodayIdealfine conditions
- Outdoor entertainingtodayIdealfine conditions
- Drying laundry outsidetodayVery goodlittle sun
- Painting and outdoor projectstodayIdealfine conditions
- FrosttonightLowmild
Pests
- MosquitoestodayModeratewarm
- TickstodayModeratewarm
- Indoor pestsnext 24 hLowmild
- Outdoor peststodayLowcool
In words
Written here from the MET Norway forecastTonight51° · NNE 11–12 mph
Cloudy. Low near 10°C. Northnortheast wind 18 to 20 km/h.
Monday59° · NE 8–11 mph
Cloudy. High near 15°C. Northeast wind 13 to 18 km/h.
Monday Night46° · NE 7–12 mph
Cloudy. Low near 8°C. Northeast wind 12 to 19 km/h.
Tuesday62° · ENE 10–14 mph
Partly cloudy. High near 17°C. Eastnortheast wind 16 to 23 km/h.
Tuesday Night48° · ENE 9–12 mph
Partly cloudy. Low near 9°C. Eastnortheast wind 15 to 19 km/h.
Wednesday63° · E 11–13 mph
Mostly clear. High near 17°C. East wind 17 to 21 km/h.
Wednesday Night52° · ENE 6–7 mph
Clear. Low near 11°C. Eastnortheast wind 10 to 11 km/h.
Thursday63° · E 6–9 mph
Mostly clear. High near 17°C. East wind 10 to 14 km/h.
Thursday Night51° · ENE 2–5 mph
Clear. Low near 11°C. Eastnortheast wind 3 to 8 km/h.
Friday67° · NNE 6–7 mph
Clear. High near 20°C. Northnortheast wind 9 to 11 km/h.
Friday Night55° · N 7–8 mph
Cloudy. Low near 13°C. North wind 11 to 13 km/h.
Saturday70° · N 8–9 mph
Cloudy. High near 21°C. North wind 13 to 14 km/h.
Saturday Night55° · NNW 8 mph
Cloudy. Low near 13°C. Northnorthwest wind around 13 km/h.
Sunday72° · N 6–9 mph
Clear. High near 22°C. North wind 10 to 14 km/h.
Sunday Night58° · NNE 5–6 mph
Clear. Low near 15°C. Northnortheast wind 8 to 10 km/h.
Monday70° · ENE 5–6 mph
Clear. High near 21°C. Eastnortheast wind 8 to 9 km/h.
Monday Night59° · ENE 4–6 mph
Mostly clear. Low near 15°C. Eastnortheast wind 7 to 9 km/h.
Tuesday66° · E 7–11 mph
Cloudy. High near 19°C. East wind 11 to 17 km/h.
Tuesday Night62° · E 7–8 mph
Cloudy. Low near 17°C. East wind 12 to 13 km/h. Precipitation around 0.5 mm.
Wednesday61° · ESE 7 mph
No forecast. High near 16°C. Eastsoutheast wind around 12 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 | Mon | Tue | Wed | Thu | Fri | Sat | Sun | Mon | Tue | Wed |
|---|---|---|---|---|---|---|---|---|---|---|
| Pressure min | 30.16 inHg | 30.29 inHg | 30.45 inHg | 30.40 inHg | 30.19 inHg | 30.01 inHg | 29.99 inHg | 30.01 inHg | 29.96 inHg | 29.91 inHg |
Against the record
NOAA GHCN · Niagara Falls International (IAG) · 54 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 |
|---|---|---|---|---|
| Mon Sep 21 | 59° / 51° | 76° / 52° | 88° (2018) | 38° (1956) |
| Tue Sep 22 | 62° / 48° | 73° / 52° | 85° (2016) | 39° (2020) |
| Wed Sep 23 | 63° / 52° | 73° / 51° | 90° (2017) | 38° (1963) |
| Thu Sep 24 | 63° / 51° | 74° / 50° | 93° (2017) | 32° (1963) |
| Fri Sep 25 | 67° / 55° | 73° / 52° | 93° (2017) | 39° (2013) |
| Sat Sep 26 | 70° / 55° | 72° / 51° | 91° (2017) | 38° (1957) |
| Sun Sep 27 | 72° / 58° | 71° / 52° | 89° (2017) | 35° (1957) |
| Mon Sep 28 | 70° / 59° | 70° / 52° | 87° (1959) | 30° (1957) |
| Tue Sep 29 | 66° / 62° | 66° / 48° | 85° (1954) | 34° (1951) |
| Wed Sep 30 | 61° / 61° | — | 80° (1954) | 38° (1951) |
Sun and moon
| Day | Civil twilight | Sunrise | Sunset | Civil twilight | Daylight | Moon |
|---|---|---|---|---|---|---|
| Mon | 6:35 AM | 7:04 AM | 7:17 PM | 7:45 PM | 12 h 13 min | Waxing gibbous · 75% lit |
| Tue | 6:36 AM | 7:05 AM | 7:15 PM | 7:44 PM | 12 h 10 min | Waxing gibbous · 83% lit |
| Wed | 6:37 AM | 7:06 AM | 7:13 PM | 7:42 PM | 12 h 7 min | Waxing gibbous · 90% lit |
| Thu | 6:39 AM | 7:07 AM | 7:11 PM | 7:40 PM | 12 h 4 min | Waxing gibbous · 96% lit |
| Fri | 6:40 AM | 7:08 AM | 7:09 PM | 7:38 PM | 12 h 1 min | Waxing gibbous · 99% lit |
| Sat | 6:41 AM | 7:10 AM | 7:08 PM | 7:36 PM | 11 h 58 min | Full moon · 100% lit |
| Sun | 6:42 AM | 7:11 AM | 7:06 PM | 7:34 PM | 11 h 55 min | Waning gibbous · 99% lit |
| Mon | 6:43 AM | 7:12 AM | 7:04 PM | 7:33 PM | 11 h 52 min | Waning gibbous · 95% lit |
| Tue | 6:44 AM | 7:13 AM | 7:02 PM | 7:31 PM | 11 h 49 min | Waning gibbous · 90% lit |
| Wed | 6:46 AM | 7:14 AM | 7:00 PM | 7:29 PM | 11 h 46 min | Waning gibbous · 83% 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