Ontario Weather Forecast
Ontario weather: 36°F, partly cloudy. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
Ontario is a province in Canada. Ontario is a Canadian province or territory. It has a population of about 15.6 million. The capital is Toronto.
Right now it is 36°F (2°C) in Ontario with partly cloudy. It feels like 31°F. Today runs from 36°F to 62°F. Chance of precipitation is 2%. Sightseeing conditions score 7.5/10 - good conditions.
The best time to visit Ontario is June, July, August and September. The climate is subarctic. February, November and December tend to be the least comfortable months. July is the warmest month with average highs near 77°F, while January is the coldest with lows near -7°F.
The closest major airport is Toronto Pearson International Airport (YYZ), about 587 mi away. Nearby highlights include CN Tower and Algonquin Provincial Park.
In plain terms. Today is slightly cooler than average for September. The forecast high of 62°F is 6.1°F below the 68°F typical for this month. The best window to be outside is roughly 4 PM to 7 PM, when temperature, rain chance and wind line up best. driving is the strongest bet in Ontario today at 9.6/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Weather in Ontario right now
Source: Open-Meteo. Updated 3:43 AM, Sep 21 local time.
See the Ontario forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for Ontario
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Mon, Sep 21 | ☁️ Overcast | 62° / 36° | 2% | 9 mph | 4 |
| Tue, Sep 22 | 🌤️ Mainly clear | 71° / 44° | 0% | 9 mph | 4 |
| Wed, Sep 23 | ☀️ Clear sky | 69° / 44° | 0% | 9 mph | 4 |
| Thu, Sep 24 | ☁️ Overcast | 67° / 43° | 3% | 12 mph | 4 |
| Fri, Sep 25 | ☁️ Overcast | 70° / 53° | 3% | 9 mph | 4 |
| Sat, Sep 26 | ☁️ Overcast | 64° / 56° | 3% | 8 mph | 2 |
| Sun, Sep 27 | 🌦️ Light drizzle | 65° / 52° | 10% · 0,0 in | 9 mph | 2 |
| Mon, Sep 28 | ☁️ Overcast | 71° / 46° | 19% | 15 mph | 4 |
| Tue, Sep 29 | 🌦️ Light drizzle | 62° / 46° | 25% · 0,0 in | 15 mph | 3 |
| Wed, Sep 30 | 🌦️ Drizzle | 60° / 44° | 31% · 0,1 in | 7 mph | 4 |
| Thu, Oct 1 | ☁️ Overcast | 49° / 40° | 21% | 7 mph | 2 |
| Fri, Oct 2 | 🌦️ Drizzle | 51° / 35° | 29% · 0,1 in | 11 mph | 2 |
| Sat, Oct 3 | 🌦️ Light drizzle | 44° / 38° | 18% · 0,0 in | 8 mph | 1 |
| Sun, Oct 4 | ☁️ Overcast | 49° / 37° | 19% | 17 mph | 3 |
| Mon, Oct 5 | 🌧️ Rain | 48° / 41° | 26% · 1,1 in | 20 mph | 0 |
| Tue, Oct 6 | ☀️ Clear sky | -- / -- | 29% | -- | — |
Climate in Ontario month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 9° | -7° | 1,0 in | ★★☆☆☆ |
| February | 17° | -3° | 1,5 in | ★★☆☆☆ |
| March | 24° | 1° | 1,6 in | ★★☆☆☆ |
| April | 41° | 20° | 2,3 in | ★★☆☆☆ |
| May | 58° | 37° | 2,0 in | ★★★★☆ |
| June | 72° | 50° | 2,8 in | ★★★★☆ |
| July | 77° | 57° | 3,2 in | ★★★★☆ |
| August | 73° | 54° | 2,3 in | ★★★★☆ |
| September | 68° | 49° | 2,7 in | ★★★★☆ |
| October | 51° | 37° | 2,7 in | ★★★☆☆ |
| November | 32° | 22° | 2,0 in | ★★☆☆☆ |
| December | 19° | 4° | 2,0 in | ★★☆☆☆ |
Climate type: Subarctic. Source: Open-Meteo archive (ERA5).
Weather map for Ontario
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in Ontario
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit Ontario
Go in June, July, August and September. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: February, November and December - expect the least comfortable mix of heat, cold or rain.
Weather by city in Ontario
3 cities mapped in this atlas
Weather by state park in Ontario
1 state and provincial parks mapped in this atlas
Explore Ontario
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Ontario?
Ontario is a province in Canada. Its coordinates are 51.2538, -85.3232. It lies in North America.
What is the weather like in Ontario right now?
It is currently 36°F (2°C) with partly cloudy. Humidity is 91% and wind is 5 mph.
When is the best time to visit Ontario?
June, July, August and September offer the most comfortable conditions in Ontario, which has a subarctic climate. February, November and December are usually the hardest months for outdoor plans.
What time zone is Ontario in?
Ontario observes America/Toronto (UTC-04:00). The local time is 3:43 AM.
How many people live in Ontario?
Ontario has a population of approximately 15.6 million.
What is the nearest airport to Ontario?
The closest airports are Toronto Pearson International Airport (YYZ), 587 mi away.
What are the top things to do in Ontario?
Popular options include CN Tower and Algonquin Provincial Park.
What places are in Ontario?
Ontario covers 4 places in this atlas, including Ottawa, Toronto, Algonquin Provincial Park and Niagara Falls, Ontario.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (ca-provinces) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated September 21, 2026 at 3:43 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
