Average annual temperature is 10.9 °C
Absolute maximum temperature: 29.9 °C
Absolute minimum temperature: -16.5 °C
Number of sunny days: 158 days
Number of rainy days: 191 days
Number of snow days: 16 days
Look at detailed online map of Harrow
* Weather data for Harrow Canada is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 9.5 | 13.1 | 12.8 | 21.0 | 25.5 | 29.5 | 28.9 | 28.2 | 29.9 | 24.3 | 15.4 | 12.5 |
| Average daytime temperature (°C) | 2.8 | 4.8 | 5.9 | 12.8 | 18.4 | 23.5 | 26.0 | 24.7 | 21.9 | 15.5 | 9.0 | 6.1 |
| Average temperature (°C) | 0.5 | 0.4 | 2.4 | 8.8 | 13.6 | 19.5 | 22.6 | 21.1 | 19.1 | 12.8 | 5.6 | 4.0 |
| Average night temperature (°C) | -1.4 | -2.6 | -0.1 | 5.3 | 9.6 | 15.9 | 19.6 | 17.9 | 16.4 | 10.6 | 2.8 | 2.2 |
| Absolute minimum temperature (°C) | -14.1 | -16.5 | -5.5 | -2.9 | 2.9 | 11.6 | 16.6 | 11.5 | 11.5 | -0.7 | -4.9 | -3.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 13.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.8 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.3 | 7.2 | 7.0 | 9.0 | 11.3 | 12.4 | 12.0 | 10.8 | 9.5 | 6.5 | 6.5 | 3.6 |
| Precipitation (mm) | 83 | 87 | 97 | 124 | 42 | 48 | 161 | 80 | 38 | 79 | 40 | 68 |
| Sunny days | 7 | 15 | 7 | 12 | 23 | 18 | 8 | 13 | 16 | 9 | 19 | 11 |
| Rainy days | 17 | 12 | 19 | 18 | 8 | 12 | 23 | 18 | 14 | 22 | 9 | 19 |
| Snow days | 7 | 1 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 |
The best time to visit Harrow during the most sunny months:
The largest precipitation sum in Harrow is at