Sioux Falls, SD 14-Day Forecast
South Dakota, United States 🇺🇸
The 14-day forecast for Sioux Falls is temporarily unavailable - please check back shortly. Meanwhile, the monthly averages below give a reliable picture of what to expect.
Sioux Falls 14-day outlook: the story
The best time to visit Sioux Falls is generally June to October, when these are the warmest and brightest weeks of the year. Daytime temperatures in that window sit near 76°F (24°C), with rain on about 8 days a month. For the same question asked the other way round, see where else is warm in June.
For typical conditions month by month, see the Sioux Falls climate & average temperatures guide.
Average temperatures in Sioux Falls by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 27° | 11° | 5 | 1.0 in | 6.1 h/day | 9.3 h | 17% | 75% |
| February | 31° | 13° | 5 | 0.9 in | 7.9 h/day | 10.4 h | 18% | 66% |
| March | 45° | 26° | 6 | 2.2 in | 8.3 h/day | 11.8 h | 21% | 66% |
| April | 56° | 36° | 10 | 3.6 in | 9.2 h/day | 13.4 h | 32% | 62% |
| May | 69° | 49° | 12 | 4.3 in | 10.3 h/day | 14.7 h | 39% | 65% |
| June | 81° | 62° | 10 | 4.0 in | 12.8 h/day | 15.4 h | 32% | 64% |
| July | 83° | 65° | 7 | 2.6 in | 13.2 h/day | 15.1 h | 24% | 70% |
| August | 81° | 63° | 9 | 3.2 in | 11.4 h/day | 14.0 h | 30% | 72% |
| September | 76° | 58° | 8 | 2.7 in | 10.1 h/day | 12.4 h | 27% | 67% |
| October | 59° | 42° | 7 | 2.5 in | 8.0 h/day | 10.9 h | 23% | 64% |
| November | 45° | 29° | 5 | 1.5 in | 6.9 h/day | 9.6 h | 16% | 68% |
| December | 33° | 18° | 6 | 1.5 in | 5.9 h/day | 9.0 h | 18% | 73% |
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