Average annual temperature is 10.7 °C
Absolute maximum temperature: 40.0 °C
Absolute minimum temperature: -22.9 °C
Number of sunny days: 221 days
Number of rainy days: 112 days
Number of snow days: 32 days
Look at detailed online map of South Yankton
* Weather data for South Yankton 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) | 3.2 | 5.7 | 18.3 | 29.0 | 32.1 | 35.1 | 37.6 | 40.0 | 37.9 | 32.7 | 18.7 | 13.3 |
| Average daytime temperature (°C) | -3.3 | -0.3 | 5.8 | 16.1 | 25.7 | 29.7 | 29.7 | 31.1 | 28.0 | 16.8 | 11.2 | 5.4 |
| Average temperature (°C) | -6.5 | -5.3 | -0.8 | 9.4 | 18.9 | 24.0 | 23.7 | 24.9 | 21.7 | 11.7 | 5.3 | 0.6 |
| Average night temperature (°C) | -9.7 | -9.5 | -5.2 | 3.9 | 12.9 | 18.2 | 18.5 | 19.6 | 16.4 | 7.5 | 0.9 | -3.1 |
| Absolute minimum temperature (°C) | -22.6 | -22.9 | -12.4 | -5.6 | 2.8 | 11.4 | 12.0 | 13.2 | 10.9 | -6.7 | -7.0 | -7.7 |
| 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) | 9.4 | 10.5 | 11.9 | 13.4 | 14.6 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.4 | 7.3 | 7.3 | 9.8 | 11.9 | 13.1 | 12.0 | 11.5 | 10.1 | 7.2 | 6.9 | 5.7 |
| Precipitation (mm) | 74 | 36 | 39 | 22 | 54 | 52 | 188 | 45 | 26 | 112 | 8 | 58 |
| Sunny days | 20 | 19 | 18 | 17 | 16 | 17 | 13 | 19 | 19 | 17 | 24 | 22 |
| Rainy days | 3 | 4 | 4 | 10 | 15 | 13 | 18 | 12 | 11 | 13 | 3 | 6 |
| Snow days | 8 | 5 | 9 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 3 |
The best time to visit South Yankton during the most sunny months:
Months with the longest average daylight duration in South Yankton:
The largest precipitation sum in South Yankton is at