Rainy days · Iowa
How often does it rain in Sioux City?
Sioux City gets its rain from three states and still has to share.
Sioux City gets measurable rain or snow on about 102 days a year, adding up to about 29 inches.
November usually brings Sioux City about 6 wet days and 1.3 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 City number 92 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 | 0.7 |
| February | 6 | 0.9 |
| March | 8 | 1.8 |
| April | 10 | 3.1 |
| May | 12 | 3.9 |
| June | 12 | 4.3 |
| July | 9 | 3.4 |
| August | 10 | 3.9 |
| September | 8 | 2.8 |
| October | 8 | 2.2 |
| November | 6 | 1.3 |
| December | 7 | 1.0 |
Cities with about as many rainy days
- Omaha, Nebraska: about 103 wet days a year
- Cheyenne, Wyoming: about 101 wet days a year
- Shreveport, Louisiana: about 101 wet days a year
Source: NOAA daily precipitation records for the Sioux City 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.