Rainy days · Montana
How often does it rain in Great Falls?
Great Falls gets just enough rain to remind the chinook who’s boss, briefly.
Great Falls gets measurable rain or snow on about 98 days a year, adding up to about 15 inches.
November usually brings Great Falls about 7 wet days and 0.7 inches. The wettest month is usually June, with about 12 wet days, and the driest is November, with about 7 wet days. That makes Great Falls number 96 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 | 0.6 |
| February | 8 | 0.6 |
| March | 8 | 0.7 |
| April | 10 | 1.7 |
| May | 11 | 2.4 |
| June | 12 | 2.7 |
| July | 7 | 1.2 |
| August | 7 | 1.2 |
| September | 7 | 1.3 |
| October | 7 | 1.1 |
| November | 7 | 0.7 |
| December | 7 | 0.5 |
Cities with about as many rainy days
- Billings, Montana: about 97 wet days a year
- Rapid City, South Dakota: about 96 wet days a year
- Bismarck, North Dakota: about 100 wet days a year
Source: NOAA daily precipitation records for the Great Falls 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.