The official National Weather Service forecast for Butte — 42.9114°N, 98.8493°W, 104.4 miles from I-29.
| Boyd County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 36 | 48 | 60 | 71 | 82 | 88 | 85 | 78 | 63 | 49 | 36 | 61 |
| Avg low °F | 12 | 15 | 25 | 35 | 46 | 57 | 63 | 61 | 52 | 38 | 26 | 16 | 37 |
| Precip in | 0.5 | 0.6 | 1.3 | 2.8 | 3.7 | 3.8 | 2.8 | 3.0 | 2.5 | 2.1 | 0.8 | 0.8 | 24.7 |
1996–2025 normals for Boyd County — the climate division Butte sits in. All-time county record high 109.5°F (2012-08-30); record low -30.2°F (1989-12-22). Source: NOAA / National Weather Service.