Rainy days · Iowa
How often does it rain in Waterloo?
Waterloo’s rain is pure Iowa: shows up for the corn, stays for the potluck.
Waterloo gets measurable rain or snow on about 114 days a year, adding up to about 36 inches.
November usually brings Waterloo about 8 wet days and 1.9 inches. The wettest month is usually May, with about 13 wet days, and the driest is February, with about 8 wet days. That makes Waterloo number 74 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 | 8 | 1.1 |
| February | 8 | 1.1 |
| March | 10 | 2.0 |
| April | 12 | 4.0 |
| May | 13 | 4.6 |
| June | 12 | 5.7 |
| July | 9 | 4.3 |
| August | 9 | 4.2 |
| September | 9 | 3.1 |
| October | 9 | 2.8 |
| November | 8 | 1.9 |
| December | 8 | 1.4 |
Cities with about as many rainy days
- Jacksonville, Florida: about 114 wet days a year
- St. Louis, Missouri: about 114 wet days a year
- Baton Rouge, Louisiana: about 114 wet days a year
Source: NOAA daily precipitation records for the Waterloo 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.