The official National Weather Service forecast for Glenwood — 41.0469°N, 95.7425°W, population 5,009, 5.3 miles from I-29.
| Mills County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 33 | 38 | 51 | 64 | 73 | 83 | 86 | 84 | 79 | 66 | 51 | 38 | 62 |
| Avg low °F | 15 | 18 | 29 | 39 | 51 | 62 | 65 | 63 | 55 | 42 | 30 | 19 | 41 |
| Precip in | 0.8 | 1.1 | 1.9 | 3.3 | 5.2 | 4.8 | 3.6 | 4.0 | 2.9 | 2.7 | 1.4 | 1.2 | 32.9 |
1996–2025 normals for Mills County — the climate division Glenwood sits in. All-time county record high 104.7°F (1974-07-22); record low -26.3°F (1974-01-12). Source: NOAA / National Weather Service.