Average annual temperature is 6.1 °C
Absolute maximum temperature: 32.9 °C
Absolute minimum temperature: -31.8 °C
Number of sunny days: 176 days
Number of rainy days: 134 days
Number of snow days: 55 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) | 1.8 | 6.1 | 3.8 | 23.7 | 30.0 | 30.5 | 30.8 | 29.1 | 32.9 | 27.7 | 15.1 | 8.1 |
| Average daytime temperature (°C) | -5.4 | -3.8 | -0.1 | 7.5 | 20.9 | 25.5 | 24.3 | 24.3 | 21.7 | 11.9 | 3.4 | 1.9 |
| Average temperature (°C) | -8.8 | -9.5 | -5.2 | 1.6 | 13.9 | 19.5 | 19.0 | 18.9 | 16.6 | 8.0 | -0.8 | -1.4 |
| Average night temperature (°C) | -11.6 | -14.2 | -9.6 | -3.0 | 7.8 | 14.0 | 14.3 | 14.4 | 12.6 | 5.0 | -3.8 | -3.7 |
| Absolute minimum temperature (°C) | -27.8 | -31.8 | -19.9 | -12.7 | -0.8 | 7.8 | 10.1 | 9.5 | 3.0 | -5.9 | -14.8 | -12.6 |
| 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 | 8.0 |
| Daylight mean duration (h) | 9.0 | 10.3 | 11.9 | 13.6 | 15.1 | 15.9 | 15.5 | 14.2 | 12.6 | 10.9 | 9.4 | 8.5 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.1 | 6.8 | 7.5 | 7.1 | 11.3 | 12.0 | 12.7 | 10.4 | 7.6 | 5.6 | 4.4 | 3.1 |
| Precipitation (mm) | 19 | 39 | 51 | 112 | 35 | 59 | 64 | 121 | 116 | 41 | 17 | 70 |
| Sunny days | 19 | 15 | 17 | 12 | 18 | 16 | 7 | 15 | 10 | 13 | 18 | 16 |
| Rainy days | 1 | 3 | 2 | 13 | 13 | 14 | 24 | 16 | 20 | 14 | 5 | 9 |
| Snow days | 11 | 10 | 12 | 5 | 0 | 0 | 0 | 0 | 0 | 4 | 7 | 6 |
The best time to visit Riley during the most sunny months:
Months with the longest average daylight duration in Riley:
The largest precipitation sum in Riley is at