The official National Weather Service forecast for White Sulphur Springs — 46.5483°N, 110.9022°W, 49.3 miles from I-15.
| Meagher County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 32 | 41 | 48 | 58 | 67 | 78 | 76 | 66 | 52 | 40 | 31 | 52 |
| Avg low °F | 14 | 13 | 20 | 26 | 34 | 41 | 48 | 46 | 39 | 30 | 21 | 14 | 29 |
| Precip in | 1.2 | 1.2 | 1.3 | 2.0 | 3.1 | 3.2 | 1.4 | 1.5 | 1.5 | 1.5 | 1.2 | 1.3 | 20.4 |
1996–2025 normals for Meagher County — the climate division White Sulphur Springs sits in. All-time county record high 96.4°F (2026-07-13); record low -38.6°F (1983-12-25). Source: NOAA / National Weather Service.