South Dakota weather by month
Average temperatures and rainfall across South Dakota, based on 30 years of climate data.
Monthly climate (Sioux Falls)
| Month | High / Low | Rainfall | Wet days |
|---|---|---|---|
| Jan | 26° / 10° | 0.8 in | 4.7 |
| Feb | 31° / 13° | 0.9 in | 4.8 |
| Mar | 43° / 24° | 1.8 in | 6.6 |
| Apr | 57° / 36° | 3.6 in | 10.3 |
| May | 69° / 49° | 4.5 in | 12.5 |
| Jun | 78° / 59° | 5.1 in | 12.5 |
| Jul | 82° / 64° | 3.3 in | 8.9 |
| Aug | 80° / 61° | 3.3 in | 8.8 |
| Sep | 73° / 52° | 3.2 in | 7.9 |
| Oct | 59° / 39° | 2.4 in | 7 |
| Nov | 43° / 25° | 1.6 in | 5.5 |
| Dec | 30° / 15° | 1.0 in | 5 |