The official National Weather Service forecast for Platte — 43.3869°N, 98.8445°W, 23.9 miles from I-90.
| Charles Mix County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 36 | 48 | 60 | 71 | 82 | 88 | 85 | 78 | 63 | 48 | 34 | 60 |
| Avg low °F | 11 | 14 | 25 | 35 | 46 | 58 | 63 | 61 | 52 | 38 | 25 | 15 | 37 |
| Precip in | 0.6 | 0.6 | 1.2 | 2.8 | 3.5 | 3.9 | 2.7 | 3.1 | 2.5 | 2.1 | 0.8 | 0.8 | 24.6 |
1996–2025 normals for Charles Mix County — the climate division Platte sits in. All-time county record high 109.9°F (2012-08-30); record low -30.4°F (1966-01-29). Source: NOAA / National Weather Service.