Montana weather by month
Average temperatures and rainfall across Montana, based on 30 years of climate data.
Monthly climate (Billings)
| Month | High / Low | Rainfall | Wet days |
|---|---|---|---|
| Jan | 35° / 18° | 0.9 in | 5.7 |
| Feb | 39° / 20° | 0.8 in | 6 |
| Mar | 49° / 27° | 1.2 in | 7.1 |
| Apr | 58° / 35° | 2.3 in | 10.8 |
| May | 67° / 45° | 2.6 in | 10.7 |
| Jun | 77° / 53° | 2.1 in | 9 |
| Jul | 87° / 60° | 0.9 in | 4.9 |
| Aug | 86° / 58° | 0.7 in | 3.9 |
| Sep | 74° / 49° | 1.4 in | 5.5 |
| Oct | 59° / 38° | 1.8 in | 7.2 |
| Nov | 45° / 27° | 0.9 in | 5.9 |
| Dec | 36° / 20° | 0.8 in | 5.4 |