Average annual temperature is 12.0 °C
Absolute maximum temperature: 35.6 °C
Absolute minimum temperature: -19.4 °C
Number of sunny days: 208 days
Number of rainy days: 137 days
Number of snow days: 20 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) | 11.6 | 14.9 | 21.3 | 27.7 | 30.7 | 32.3 | 35.2 | 35.6 | 33.6 | 31.7 | 19.4 | 14.6 |
| Average daytime temperature (°C) | 2.0 | 6.1 | 8.8 | 17.8 | 25.0 | 28.6 | 28.8 | 28.4 | 26.7 | 18.6 | 11.1 | 7.0 |
| Average temperature (°C) | -2.1 | -0.3 | 2.8 | 10.9 | 18.6 | 23.0 | 23.4 | 23.6 | 20.8 | 13.6 | 5.8 | 3.0 |
| Average night temperature (°C) | -5.1 | -4.9 | -1.5 | 5.4 | 12.5 | 17.3 | 18.7 | 19.3 | 15.7 | 9.3 | 1.5 | -0.3 |
| Absolute minimum temperature (°C) | -16.0 | -19.4 | -12.6 | -4.5 | 3.0 | 9.7 | 13.8 | 13.5 | 10.2 | -4.0 | -10.0 | -6.1 |
| 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 | 9.3 |
| 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) | 5.2 | 7.5 | 7.1 | 9.4 | 11.7 | 12.4 | 12.0 | 11.3 | 10.6 | 7.7 | 7.1 | 5.0 |
| Precipitation (mm) | 59 | 61 | 52 | 33 | 34 | 77 | 144 | 77 | 51 | 52 | 10 | 53 |
| Sunny days | 14 | 17 | 15 | 18 | 20 | 15 | 15 | 16 | 21 | 18 | 24 | 15 |
| Rainy days | 8 | 8 | 15 | 10 | 11 | 15 | 16 | 15 | 9 | 12 | 5 | 13 |
| Snow days | 9 | 3 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 3 |
The best time to visit Ottawa during the most sunny months:
The largest precipitation sum in Ottawa is at