The official National Weather Service forecast for Alma — 40.0975°N, 99.362°W, 41.2 miles from I-80.
| Harlan County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 43 | 55 | 65 | 74 | 86 | 90 | 88 | 81 | 67 | 54 | 42 | 65 |
| Avg low °F | 16 | 18 | 28 | 37 | 48 | 60 | 65 | 63 | 53 | 40 | 27 | 18 | 39 |
| Precip in | 0.4 | 0.6 | 1.3 | 2.4 | 3.9 | 3.6 | 3.6 | 3.3 | 1.9 | 1.9 | 0.9 | 0.6 | 24.4 |
1996–2025 normals for Harlan County — the climate division Alma sits in. All-time county record high 111.0°F (1954-07-12); record low -30.0°F (1989-12-23). Source: NOAA / National Weather Service.