Ontario, Canada Weather
- Ontario, Canada Weather
- Current conditions
- Weather forecast
- Averages and extremes
- Yesterday's Data
- Temperature and possibility of rain in Ontario over the next 12 hours
- Temperature and possibility of rain in Ontario in the coming days
- Rainfall in Ontario in the coming days
- Ontario Weather Summary
- Weather averages by month
- Ontario's weather
- Frequently asked questions
- Comments
Current conditions
Condition: Overcast
Pressure: 1,007 hPa
Feel like: 14 °C
Temperature: 17°C
Cloud: 100%
Humidity: 48%
Wind: SSW - 14 km/h
Visibility: 37.8 km
30 Day Averages and Extremes
- Average high 14.87°C
- Average low 5.33°C
- Hottest day 24°C (11 September 2026)
- Coldest day -2°C (07 October 2026)
- Average humidity 72.73%
- Days with precipitation 18 days
- Highest precipitation 33 mm (29 September 2026)
Yesterday's Data
- Max: 22°C
- Min: 5°C
- Total Precipitation: 0 mm
Temperature and possibility of rain in Ontario over the next 12 hours
Temperature and possibility of rain in Ontario in the coming days
Rainfall in Ontario in the coming days
Ontario Climate Summary
Ontario features a Subartic, severe winter, no dry season, cool summer (Köppen classification: Dfc), with an average annual temperature of 2.61ºC (36.7ºF), which is about 0.52% higher than the national average for Canada. Annually, the city experiences approximately 40.94 millimeters (1.61 inches) of rainfall, spread across 99.45 rainy days, accounting for 27.25% of the year.
| Longitude | 51.253775 |
| Latitude | -85.323214 |
| Yearly high temperature | 5.73ºC (42.31ºF) |
| Yearly low temperature | -3.07ºC (26.47ºF) |
| Hottest month | June 20.53ºC (68.95ºF) |
| Coldest month | January -20.82ºC (-5.48ºF) |
| Yearly precip | 40.94mm (1.61in) |
| Days with rainfall | 99.45 days (27.25%) |
| Driest month | February (93.43%) |
| Wettest month | September (78.45%) |
Weather averages by month
| Month | High / Low (°C) | Rain |
|---|---|---|
| January | -12.89° / -20.82° | 7.27 days |
| February | -11.46° / -19.89° | 6.09 days |
| March | -3.99° / -12.13° | 8.36 days |
| April | 3.16° / -5.18° | 8.09 days |
| May | 14.6° / 3.55° | 8.91 days |
| June | 20.53° / 8.78° | 8.91 days |
| July | 24.1° / 12.26° | 8.64 days |
| August | 22.28° / 11.37° | 9.64 days |
| September | 15.66° / 6.63° | 8.27 days |
| October | 7.34° / 0.95° | 8.91 days |
| November | -1.44° / -6.84° | 9.45 days |
| December | -9.1° / -15.56° | 6.91 days |
Ontario's weather
Frequently asked questions
1. What is the hottest month in Ontario?
June has the highest average monthly temperature (daily mean of 20.53ºC) and January are the coolest (daily mean of -20.82ºC).
2. What should I wear in Ontario today?
For today's warm weather in Ontario, with temperatures between 18ºC to 21ºC (64.4ºF to 69.8ºF), you might consider wearing:
- Shorts or lightweight trousers
- T-shirt or short-sleeve blouse
- Comfortable sandals or sneakers
- Sunglasses
Temperature
Air quality
Satisfactory air quality, minimal pollution, low risk
- CO2 424
- CO 118
- NH3 0
- NO2 0
- O3 62
- PM10 0
- PM25 0
- SO2 0
- CH4 1,388