Rainy days · Ohio
How often does it rain in Dayton?
Dayton’s rain falls with the quiet patience of a city that invented flight and then stayed home.
Dayton gets measurable rain or snow on about 134 days a year, adding up to about 41 inches.
November usually brings Dayton about 10 wet days and 3.1 inches. The wettest month is usually May, with about 14 wet days, and the driest is August, with about 8 wet days. That makes Dayton number 26 of the 129 US cities we track, rainiest first.
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Rainy days, month by month
| Month | Wet days | Inches |
|---|---|---|
| January | 13 | 3.1 |
| February | 11 | 2.4 |
| March | 12 | 3.5 |
| April | 13 | 4.5 |
| May | 14 | 4.5 |
| June | 12 | 4.1 |
| July | 11 | 3.9 |
| August | 8 | 3.0 |
| September | 9 | 3.3 |
| October | 10 | 3.0 |
| November | 10 | 3.1 |
| December | 12 | 3.0 |
Cities with about as many rainy days
- Lexington, Kentucky: about 134 wet days a year
- Duluth, Minnesota: about 133 wet days a year
- Toledo, Ohio: about 133 wet days a year
Source: NOAA daily precipitation records for the Dayton 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.