The official National Weather Service forecast for Butte — 46.0038°N, 112.5347°W, population 30,258, 1.9 miles from I-90.
| Silver Bow County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 33 | 41 | 48 | 57 | 67 | 78 | 76 | 66 | 52 | 39 | 31 | 52 |
| Avg low °F | 14 | 14 | 20 | 26 | 34 | 41 | 48 | 46 | 39 | 29 | 20 | 14 | 29 |
| Precip in | 0.9 | 1.0 | 1.2 | 1.8 | 2.6 | 2.7 | 1.1 | 1.3 | 1.4 | 1.3 | 1.0 | 1.1 | 17.4 |
1996–2025 normals for Silver Bow County — the climate division Butte sits in. All-time county record high 93.0°F (2002-07-13); record low -38.3°F (1989-02-04). Source: NOAA / National Weather Service.