Average annual temperature is 10.9 °C
Absolute maximum temperature: 36.8 °C
Absolute minimum temperature: -25.7 °C
Number of sunny days: 190 days
Number of rainy days: 155 days
Number of snow days: 20 days
Look at detailed online map of Riley
* Weather data for Riley 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) | 9.3 | 15.0 | 20.3 | 25.7 | 31.7 | 32.9 | 34.0 | 36.8 | 34.4 | 27.6 | 19.0 | 14.4 |
| Average daytime temperature (°C) | 2.1 | 4.2 | 7.4 | 15.7 | 22.7 | 28.1 | 28.9 | 28.1 | 24.5 | 16.4 | 9.0 | 6.1 |
| Average temperature (°C) | -1.7 | -1.2 | 2.1 | 9.2 | 15.9 | 21.5 | 23.1 | 22.4 | 19.3 | 12.0 | 4.2 | 2.5 |
| Average night temperature (°C) | -4.5 | -5.3 | -1.8 | 3.5 | 9.9 | 15.2 | 17.7 | 17.5 | 15.2 | 8.2 | 0.2 | 0.1 |
| Absolute minimum temperature (°C) | -25.7 | -23.1 | -13.0 | -3.5 | 0.4 | 6.9 | 13.1 | 10.5 | 8.3 | -2.9 | -11.6 | -8.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 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 | 13.9 | 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) | 3.5 | 7.4 | 6.8 | 8.9 | 11.1 | 12.1 | 12.0 | 11.0 | 8.3 | 6.9 | 6.9 | 3.9 |
| Precipitation (mm) | 63 | 81 | 82 | 82 | 43 | 26 | 117 | 70 | 110 | 91 | 36 | 62 |
| Sunny days | 14 | 16 | 11 | 15 | 22 | 18 | 16 | 16 | 12 | 11 | 23 | 16 |
| Rainy days | 6 | 9 | 15 | 15 | 9 | 12 | 15 | 15 | 18 | 20 | 7 | 14 |
| Snow days | 11 | 3 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Riley during the most sunny months:
The largest precipitation sum in Riley is at