Rainy days · Montana
How often does it rain in Missoula?
Missoula’s wet days are mostly winter grey, then summer turns so dry the valley forgets rain exists.
Missoula gets measurable rain or snow on about 124 days a year, adding up to about 14 inches.
November usually brings Missoula about 11 wet days and 1.2 inches. The wettest month is usually December, with about 13 wet days, and the driest is July, with about 6 wet days. That makes Missoula number 45 of the 129 US cities we track, rainiest first.
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Rainy days, month by month
| Month | Wet days | Inches |
|---|---|---|
| January | 13 | 0.9 |
| February | 11 | 0.9 |
| March | 11 | 0.9 |
| April | 11 | 1.4 |
| May | 12 | 1.8 |
| June | 13 | 2.1 |
| July | 6 | 0.8 |
| August | 6 | 0.8 |
| September | 7 | 1.0 |
| October | 10 | 1.2 |
| November | 11 | 1.2 |
| December | 13 | 1.1 |
Cities with about as many rainy days
- Nashville, Tennessee: about 123 wet days a year
- Newark, New Jersey: about 123 wet days a year
- Chattanooga, Tennessee: about 123 wet days a year
Source: NOAA daily precipitation records for the Missoula 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.