The official National Weather Service forecast for McIntosh — 45.9214°N, 101.3496°W, 137.6 miles from I-90.
| Corson County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 26 | 30 | 42 | 56 | 68 | 79 | 86 | 84 | 75 | 58 | 43 | 30 | 56 |
| Avg low °F | 6 | 9 | 19 | 30 | 42 | 53 | 59 | 56 | 47 | 34 | 20 | 10 | 32 |
| Precip in | 0.3 | 0.5 | 0.7 | 1.7 | 3.1 | 3.2 | 2.5 | 2.2 | 1.7 | 1.5 | 0.5 | 0.5 | 18.4 |
1996–2025 normals for Corson County — the climate division McIntosh sits in. All-time county record high 110.2°F (2006-07-16); record low -36.1°F (1966-01-29). Source: NOAA / National Weather Service.