Average annual temperature is 12.2 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: -19.6 °C
Number of sunny days: 188 days
Number of rainy days: 164 days
Number of snow days: 13 days
Look at detailed online map of Ottawa
* Weather data for Ottawa United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 13.2 | 14.7 | 21.5 | 26.3 | 32.3 | 34.1 | 35.4 | 36.9 | 34.2 | 28.7 | 20.5 | 15.4 |
| Average daytime temperature (°C) | 3.7 | 6.7 | 9.3 | 18.1 | 24.5 | 29.5 | 29.3 | 29.0 | 25.5 | 17.9 | 10.7 | 7.5 |
| Average temperature (°C) | -0.3 | 1.1 | 3.8 | 10.9 | 17.8 | 22.7 | 23.7 | 23.2 | 20.2 | 13.2 | 5.4 | 3.6 |
| Average night temperature (°C) | -3.2 | -3.1 | -0.3 | 5.0 | 11.6 | 16.3 | 18.4 | 18.2 | 15.8 | 9.3 | 1.2 | 1.0 |
| Absolute minimum temperature (°C) | -19.6 | -18.0 | -11.8 | -1.5 | 1.8 | 9.4 | 13.7 | 11.7 | 9.8 | -1.7 | -10.2 | -7.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.3 | 7.6 | 6.8 | 9.3 | 10.9 | 12.3 | 12.1 | 10.8 | 8.6 | 7.1 | 7.3 | 4.3 |
| Precipitation (mm) | 56 | 71 | 105 | 97 | 135 | 17 | 178 | 79 | 165 | 149 | 32 | 65 |
| Sunny days | 11 | 18 | 14 | 15 | 20 | 19 | 13 | 17 | 11 | 12 | 22 | 16 |
| Rainy days | 12 | 8 | 16 | 15 | 11 | 11 | 18 | 14 | 19 | 18 | 7 | 15 |
| Snow days | 8 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
The best time to visit Ottawa during the most sunny months:
The largest precipitation sum in Ottawa is at