The official National Weather Service forecast for Halsey — 41.9033°N, 100.269°W, 59.4 miles from I-80.
| Thomas County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 40 | 52 | 61 | 71 | 82 | 88 | 86 | 78 | 64 | 51 | 40 | 63 |
| Avg low °F | 14 | 15 | 25 | 33 | 44 | 55 | 61 | 59 | 49 | 36 | 24 | 15 | 36 |
| Precip in | 0.5 | 0.7 | 1.1 | 2.6 | 4.0 | 4.0 | 3.5 | 2.5 | 2.0 | 1.7 | 0.6 | 0.6 | 23.8 |
1996–2025 normals for Thomas County — the climate division Halsey sits in. All-time county record high 110.2°F (1954-07-13); record low -29.5°F (1983-12-21). Source: NOAA / National Weather Service.