The official National Weather Service forecast for Lusk — 42.7625°N, 104.4522°W, 33.2 miles from I-25.
| Niobrara County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 39 | 50 | 58 | 67 | 80 | 89 | 87 | 78 | 61 | 48 | 38 | 61 |
| Avg low °F | 12 | 14 | 23 | 30 | 39 | 50 | 57 | 54 | 45 | 32 | 21 | 13 | 32 |
| Precip in | 0.4 | 0.5 | 0.9 | 1.9 | 2.7 | 2.1 | 2.1 | 1.3 | 1.2 | 1.3 | 0.5 | 0.4 | 15.3 |
1996–2025 normals for Niobrara County — the climate division Lusk sits in. All-time county record high 105.0°F (2006-07-16); record low -36.5°F (1990-12-22). Source: NOAA / National Weather Service.