US Geography / US Weather / Montana Weather / Lewistown |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 30° | 35° | 41° | 52° | 62° | 71° | 80° | 80° | 68° | 58° | 44° | 34° |
| Avg. Low | 8° | 14° | 18° | 28° | 37° | 45° | 48° | 48° | 38° | 31° | 20° | 11° |
| Mean | 20° | 25° | 31° | 41° | 50° | 58° | 65° | 65° | 54° | 45° | 32° | 24° |
| Avg. Precip. | 1.0 in | 0.6 in | 1.0 in | 1.3 in | 3.3 in | 3.1 in | 1.8 in | 1.9 in | 1.5 in | 1.1 in | 0.7 in | 0.9 in |
Degrees in Fahrenheit
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