The official National Weather Service forecast for Billings — 45.7833°N, 108.5007°W, population 128,787, 1.2 miles from I-90.
| Yellowstone County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 38 | 49 | 57 | 66 | 77 | 88 | 86 | 75 | 60 | 46 | 36 | 60 |
| Avg low °F | 15 | 16 | 24 | 32 | 42 | 50 | 57 | 55 | 46 | 34 | 24 | 16 | 34 |
| Precip in | 0.5 | 0.6 | 0.8 | 1.6 | 2.7 | 2.3 | 1.1 | 1.0 | 1.2 | 1.4 | 0.6 | 0.6 | 14.4 |
1996–2025 normals for Yellowstone County — the climate division Billings sits in. All-time county record high 110.0°F (2026-07-13); record low -36.2°F (1983-12-24). Source: NOAA / National Weather Service.