Average annual temperature is 10.1 °C
Absolute maximum temperature: 39.3 °C
Absolute minimum temperature: -25.2 °C
Number of sunny days: 221 days
Number of rainy days: 114 days
Number of snow days: 30 days
Look at detailed online map of Yankton County
* Weather data for Yankton County 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) | 2.4 | 4.7 | 15.5 | 28.7 | 32.6 | 35.6 | 36.4 | 39.3 | 37.6 | 32.9 | 18.5 | 11.9 |
| Average daytime temperature (°C) | -4.0 | -1.1 | 4.4 | 15.7 | 25.6 | 29.9 | 29.2 | 30.6 | 27.6 | 16.3 | 10.5 | 4.8 |
| Average temperature (°C) | -7.4 | -6.4 | -1.8 | 8.7 | 18.7 | 23.9 | 23.2 | 24.3 | 21.4 | 11.1 | 4.4 | 0.2 |
| Average night temperature (°C) | -10.5 | -10.2 | -5.7 | 3.2 | 12.6 | 18.0 | 17.8 | 19.0 | 16.1 | 6.8 | 0.1 | -3.3 |
| Absolute minimum temperature (°C) | -25.2 | -23.7 | -14.1 | -5.8 | 2.0 | 10.3 | 11.4 | 12.7 | 10.2 | -7.6 | -8.7 | -8.3 |
| 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 | 14.7 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 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 | 8.0 |
| Sunshine mean duration (h) | 4.4 | 7.4 | 7.2 | 9.9 | 12.0 | 13.1 | 12.2 | 11.6 | 10.1 | 7.1 | 7.0 | 5.6 |
| Precipitation (mm) | 62 | 34 | 45 | 30 | 104 | 63 | 190 | 51 | 29 | 113 | 5 | 59 |
| Sunny days | 20 | 19 | 19 | 17 | 14 | 15 | 16 | 20 | 18 | 16 | 25 | 22 |
| Rainy days | 3 | 5 | 4 | 10 | 17 | 15 | 15 | 11 | 12 | 13 | 3 | 6 |
| Snow days | 8 | 4 | 8 | 3 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 3 |
The best time to visit Yankton County during the most sunny months:
Months with the longest average daylight duration in Yankton County:
The largest precipitation sum in Yankton County is at