LEWISTOWN 42 WSW, MT US
GHCN ID: USW00004140 · MT, US · 1545.3 m elevation · Records 2008-2026 (18 years)
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 36.5°F | 13.3°F | 24.9°F | 0.61 in | — |
| February | 35.8°F | 12.1°F | 24.0°F | 0.82 in | — |
| March | 43.5°F | 19.6°F | 31.5°F | 0.86 in | — |
| April | 49.8°F | 24.7°F | 37.3°F | 1.60 in | — |
| May | 59.5°F | 33.0°F | 46.3°F | 2.83 in | — |
| June | 67.4°F | 40.0°F | 53.7°F | 3.07 in | — |
| July | 77.5°F | 44.3°F | 60.9°F | 1.70 in | — |
| August | 77.3°F | 43.8°F | 60.6°F | 1.40 in | — |
| September | 68.5°F | 36.0°F | 52.2°F | 1.34 in | — |
| October | 53.3°F | 27.8°F | 40.6°F | 1.33 in | — |
| November | 42.1°F | 20.4°F | 31.2°F | 0.65 in | — |
| December | 34.7°F | 13.3°F | 24.0°F | 0.55 in | — |