The official National Weather Service forecast for Belcourt — 48.8392°N, 99.7449°W, 113.2 miles from I-29.
| Rolette County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 16 | 20 | 32 | 50 | 64 | 74 | 79 | 78 | 69 | 52 | 34 | 20 | 49 |
| Avg low °F | -3 | 0 | 12 | 27 | 39 | 50 | 55 | 53 | 44 | 31 | 16 | 3 | 27 |
| Precip in | 0.5 | 0.4 | 0.6 | 1.0 | 2.6 | 3.6 | 2.7 | 2.4 | 1.6 | 1.3 | 0.6 | 0.7 | 18.0 |
1996–2025 normals for Rolette County — the climate division Belcourt sits in. All-time county record high 102.5°F (2021-06-05); record low -42.6°F (1996-02-02). Source: NOAA / National Weather Service.