The official National Weather Service forecast for Culbertson — 48.1445°N, 104.5169°W, 71.2 miles from I-94.
| Roosevelt County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 23 | 27 | 41 | 56 | 67 | 76 | 85 | 84 | 73 | 57 | 39 | 26 | 54 |
| Avg low °F | 3 | 6 | 17 | 29 | 40 | 49 | 55 | 53 | 44 | 31 | 18 | 6 | 29 |
| Precip in | 0.3 | 0.3 | 0.5 | 0.9 | 2.4 | 2.8 | 2.1 | 1.3 | 1.1 | 1.0 | 0.5 | 0.4 | 13.6 |
1996–2025 normals for Roosevelt County — the climate division Culbertson sits in. All-time county record high 109.6°F (2007-07-25); record low -48.8°F (1954-01-20). Source: NOAA / National Weather Service.