Average annual temperature is 11.7 °C
Absolute maximum temperature: 37.3 °C
Absolute minimum temperature: -23.3 °C
Number of sunny days: 224 days
Number of rainy days: 117 days
Number of snow days: 24 days
Look at detailed online map of River Sioux
* Weather data for River Sioux 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) | 8.4 | 14.3 | 21.3 | 29.6 | 30.4 | 32.5 | 35.5 | 37.3 | 34.8 | 32.3 | 19.5 | 13.6 |
| Average daytime temperature (°C) | 0.5 | 5.0 | 8.4 | 18.4 | 25.6 | 29.9 | 29.5 | 29.7 | 27.5 | 18.2 | 11.7 | 5.7 |
| Average temperature (°C) | -3.8 | -1.9 | 1.9 | 11.1 | 19.0 | 23.9 | 23.8 | 24.3 | 21.5 | 13.1 | 5.8 | 1.3 |
| Average night temperature (°C) | -7.3 | -6.7 | -2.7 | 5.3 | 12.9 | 18.0 | 18.6 | 19.5 | 16.4 | 8.8 | 1.0 | -2.3 |
| Absolute minimum temperature (°C) | -23.3 | -22.0 | -11.9 | -5.0 | 2.3 | 10.2 | 11.3 | 12.2 | 10.5 | -5.5 | -8.2 | -6.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 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) | 9.5 | 10.6 | 11.9 | 13.3 | 14.5 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.9 | 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) | 4.6 | 7.1 | 8.2 | 9.4 | 11.4 | 13.0 | 11.7 | 11.3 | 10.0 | 7.6 | 7.1 | 5.1 |
| Precipitation (mm) | 50 | 43 | 40 | 36 | 61 | 31 | 112 | 64 | 54 | 64 | 6 | 67 |
| Sunny days | 19 | 18 | 20 | 18 | 16 | 12 | 16 | 20 | 22 | 17 | 25 | 21 |
| Rainy days | 7 | 6 | 8 | 9 | 15 | 18 | 15 | 11 | 8 | 13 | 3 | 4 |
| Snow days | 5 | 4 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 6 |
The best time to visit River Sioux during the most sunny months:
The largest precipitation sum in River Sioux is at