Ontario Weather Forecast
Ontario weather: 23°F, clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Will it rain in Ontario?
No - rain is unlikely in Ontario today.
Rain is very unlikely today - plans do not need a backup.
Over the next 7 days, about 0,2 in of precipitation is forecast, with the wettest days falling on Thu.
The next 7 days look unusually dry - roughly 26% of a normal October week (0,2 in against 0,6 in).
16-day forecast for Ontario
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Mon, Oct 26 | ☁️ Overcast | 36° / 21° | 2% | 11 mph | 3 |
| Tue, Oct 27 | ☁️ Overcast | 39° / 18° | 7% | 7 mph | 3 |
| Wed, Oct 28 | 🌦️ Drizzle | 50° / 34° | 30% · 0,1 in | 11 mph | 1 |
| Thu, Oct 29 | 🌦️ Light drizzle | 42° / 30° | 43% · 0,0 in | 10 mph | 1 |
| Fri, Oct 30 | 🌨️ Light snow | 37° / 31° | 6% · 0,0 in | 9 mph | 1 |
| Sat, Oct 31 | ☁️ Overcast | 48° / 29° | 3% | 12 mph | 2 |
| Sun, Nov 1 | ☁️ Overcast | 48° / 36° | 16% | 8 mph | 2 |
| Mon, Nov 2 | ☁️ Overcast | 40° / 29° | 22% | 6 mph | 2 |
| Tue, Nov 3 | ☁️ Overcast | 42° / 27° | 22% | 5 mph | 2 |
| Wed, Nov 4 | 🌨️ Light snow | 42° / 31° | 23% · 0,2 in | 7 mph | 2 |
| Thu, Nov 5 | ❄️ Heavy snow | 33° / 31° | 23% · 0,6 in | 15 mph | 0 |
| Fri, Nov 6 | ❄️ Heavy snow | 31° / 25° | 11% · 0,7 in | 20 mph | 1 |
| Sat, Nov 7 | ☁️ Overcast | 27° / 17° | 10% | 14 mph | 2 |
| Sun, Nov 8 | ☁️ Overcast | 27° / 12° | 10% | 8 mph | 2 |
| Mon, Nov 9 | ☁️ Overcast | 31° / 8° | 16% | 7 mph | 2 |
| Tue, Nov 10 | ☁️ Overcast | 26° / 21° | 20% | 7 mph | 2 |
What this means for Ontario
Today is much colder than average for October. The forecast high of 36°F is 15.5°F below the 51°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
Overnight lows near 21°F mean ice is possible on bridges before dawn.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 98°F.
What to pack, what to skip
- A warm mid-layer and gloves for early mornings and evenings
- Insulated outer layer, hat and boots with grip for ice
- Avoid high-elevation trails without traction devices - frozen surfaces persist in shade all day.
- If your dates are flexible, avoid February, November and December - historically the least comfortable months here.
See the Ontario forecast by time range
Ontario weather - more answers
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 23°F (-5°C) with clear. Humidity is 60% 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 1:03 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 October 27, 2026 at 1:03 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
