The official National Weather Service forecast for Hazen — 47.2944°N, 101.6227°W, 37.2 miles from I-94.
| Mercer County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 23 | 27 | 39 | 54 | 67 | 77 | 84 | 83 | 74 | 57 | 40 | 27 | 54 |
| Avg low °F | 4 | 6 | 18 | 29 | 40 | 51 | 57 | 55 | 46 | 33 | 20 | 8 | 31 |
| Precip in | 0.4 | 0.5 | 0.7 | 1.3 | 2.8 | 3.2 | 2.3 | 2.0 | 1.7 | 1.3 | 0.6 | 0.6 | 17.4 |
1996–2025 normals for Mercer County — the climate division Hazen sits in. All-time county record high 106.2°F (1988-07-28); record low -38.6°F (1966-01-29). Source: NOAA / National Weather Service.