The official National Weather Service forecast for Thermopolis — 43.6461°N, 108.212°W, 78.4 miles from I-25.
| Hot Springs County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 34 | 36 | 47 | 54 | 63 | 75 | 85 | 82 | 72 | 57 | 44 | 34 | 57 |
| Avg low °F | 12 | 13 | 22 | 28 | 38 | 47 | 54 | 52 | 43 | 32 | 21 | 12 | 31 |
| Precip in | 0.5 | 0.7 | 1.0 | 1.7 | 2.4 | 1.4 | 0.8 | 0.8 | 1.2 | 1.4 | 0.6 | 0.7 | 13.2 |
1996–2025 normals for Hot Springs County — the climate division Thermopolis sits in. All-time county record high 100.8°F (2026-07-13); record low -36.5°F (1990-12-22). Source: NOAA / National Weather Service.