The official National Weather Service forecast for Armour — 43.3186°N, 98.3468°W, 26.1 miles from I-90.
| Douglas County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 34 | 47 | 59 | 71 | 81 | 87 | 84 | 78 | 62 | 47 | 33 | 59 |
| Avg low °F | 10 | 13 | 24 | 34 | 46 | 57 | 62 | 60 | 51 | 38 | 24 | 14 | 36 |
| Precip in | 0.6 | 0.7 | 1.2 | 2.8 | 3.4 | 4.0 | 2.6 | 3.1 | 2.5 | 2.1 | 0.8 | 0.8 | 24.6 |
1996–2025 normals for Douglas County — the climate division Armour sits in. All-time county record high 107.7°F (2012-08-30); record low -31.8°F (1966-01-29). Source: NOAA / National Weather Service.