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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