Average annual temperature is 21.8 °C
Absolute maximum temperature: 40.2 °C
Absolute minimum temperature: -0.7 °C
Number of sunny days: 150 days
Number of rainy days: 215 days
Look at detailed online map of Grand River
* Weather data for Grand River 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) | 26.0 | 28.1 | 28.5 | 29.3 | 33.6 | 37.7 | 38.9 | 40.2 | 37.7 | 32.0 | 28.5 | 25.0 |
| Average daytime temperature (°C) | 19.7 | 21.2 | 23.7 | 25.0 | 30.2 | 33.5 | 35.7 | 37.5 | 34.0 | 27.1 | 21.2 | 18.1 |
| Average temperature (°C) | 14.7 | 15.7 | 18.4 | 19.9 | 24.4 | 27.8 | 29.9 | 31.5 | 27.8 | 21.7 | 16.0 | 13.1 |
| Average night temperature (°C) | 10.7 | 12.0 | 14.5 | 16.0 | 19.6 | 23.4 | 25.3 | 26.6 | 23.0 | 17.3 | 12.2 | 9.2 |
| Absolute minimum temperature (°C) | 1.1 | 2.1 | -0.7 | 9.1 | 13.3 | 19.6 | 22.9 | 22.8 | 19.8 | 9.1 | 5.0 | 1.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.3 | 11.4 | 10.6 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.6 | 7.7 | 9.0 | 8.9 | 10.7 | 11.4 | 11.7 | 11.9 | 10.9 | 9.0 | 6.3 | 7.5 |
| Precipitation (mm) | 163 | 89 | 61 | 94 | 102 | 135 | 78 | 33 | 76 | 43 | 66 | 173 |
| Sunny days | 12 | 10 | 9 | 8 | 10 | 4 | 10 | 18 | 12 | 20 | 16 | 21 |
| Rainy days | 19 | 18 | 22 | 22 | 21 | 26 | 21 | 13 | 18 | 11 | 14 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Grand River during the most sunny months:
The largest precipitation sum in Grand River is at