The official National Weather Service forecast for Dubois — 43.5336°N, 109.6304°W, 132.6 miles from I-80.
| Fremont County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 34 | 44 | 51 | 61 | 73 | 82 | 79 | 69 | 55 | 41 | 32 | 54 |
| Avg low °F | 10 | 11 | 19 | 26 | 35 | 43 | 51 | 49 | 40 | 30 | 19 | 11 | 29 |
| Precip in | 0.8 | 1.0 | 1.2 | 1.7 | 2.3 | 1.3 | 0.8 | 0.9 | 1.2 | 1.3 | 0.8 | 1.0 | 14.3 |
1996–2025 normals for Fremont County — the climate division Dubois sits in. All-time county record high 96.5°F (2026-07-13); record low -40.2°F (1963-01-12). Source: NOAA / National Weather Service.