Rainy days · South Dakota
How often does it rain in Sioux Falls?
Sioux Falls gets most of its rain in late spring, when the prairie is finally awake enough to drink it.
Sioux Falls gets measurable rain or snow on about 104 days a year, adding up to about 28 inches.
November usually brings Sioux Falls about 6 wet days and 1.2 inches. The wettest month is usually May, with about 12 wet days, and the driest is November, with about 6 wet days. That makes Sioux Falls number 89 of the 129 US cities we track, rainiest first.
Last updated
No rain in the forecast for the next 48 hours.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Rainy days, month by month
| Month | Wet days | Inches |
|---|---|---|
| January | 7 | 0.6 |
| February | 7 | 0.8 |
| March | 8 | 1.6 |
| April | 10 | 3.0 |
| May | 12 | 3.9 |
| June | 12 | 4.2 |
| July | 9 | 3.3 |
| August | 9 | 3.3 |
| September | 8 | 2.7 |
| October | 8 | 2.4 |
| November | 6 | 1.2 |
| December | 7 | 0.8 |
Cities with about as many rainy days
- Kansas City, Missouri: about 104 wet days a year
- Houston, Texas: about 104 wet days a year
- Medford, Oregon: about 103 wet days a year
Source: NOAA daily precipitation records for the Sioux Falls area, 1991 to 2020 (at least 30 complete years behind every month), via the Applied Climate Information System. A wet day here means at least a hundredth of an inch of rain or melted snow.