Rainy days · Missouri
How often does it rain in St. Louis?
St. Louis rain rolls in under the Arch like it has a ticket to the game.
St. Louis gets measurable rain or snow on about 114 days a year, adding up to about 42 inches.
November usually brings St. Louis about 9 wet days and 3.4 inches. The wettest month is usually May, with about 13 wet days, and the driest is September, with about 7 wet days. That makes St. Louis number 72 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 | 9 | 2.6 |
| February | 9 | 2.2 |
| March | 11 | 3.5 |
| April | 12 | 4.7 |
| May | 13 | 4.8 |
| June | 10 | 4.5 |
| July | 9 | 3.9 |
| August | 8 | 3.4 |
| September | 7 | 3.0 |
| October | 9 | 3.1 |
| November | 9 | 3.4 |
| December | 9 | 2.5 |
Cities with about as many rainy days
- Jacksonville, Florida: about 114 wet days a year
- Waterloo, Iowa: about 114 wet days a year
- Charleston, South Carolina: about 114 wet days a year
Source: NOAA daily precipitation records for the St. Louis 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.