The official National Weather Service forecast for Chappell — 41.0928°N, 102.4707°W, 5.5 miles from I-80.
| Deuel County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 40 | 42 | 54 | 62 | 71 | 83 | 89 | 87 | 80 | 65 | 53 | 42 | 64 |
| Avg low °F | 15 | 17 | 26 | 34 | 44 | 55 | 61 | 59 | 49 | 36 | 25 | 16 | 36 |
| Precip in | 0.3 | 0.5 | 1.0 | 2.0 | 3.0 | 2.8 | 2.6 | 2.3 | 1.6 | 1.2 | 0.5 | 0.4 | 18.2 |
1996–2025 normals for Deuel County — the climate division Chappell sits in. All-time county record high 107.3°F (1954-07-11); record low -35.1°F (1989-12-22). Source: NOAA / National Weather Service.