The official National Weather Service forecast for Marbleton — 42.5536°N, 110.1093°W, 70.5 miles from I-80.
| Sublette County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 28 | 30 | 39 | 47 | 57 | 68 | 77 | 75 | 66 | 52 | 38 | 28 | 50 |
| Avg low °F | 3 | 4 | 13 | 21 | 29 | 37 | 43 | 41 | 33 | 24 | 13 | 5 | 22 |
| Precip in | 1.7 | 1.6 | 1.5 | 1.6 | 2.0 | 1.4 | 0.8 | 1.1 | 1.4 | 1.4 | 1.3 | 1.8 | 17.6 |
1996–2025 normals for Sublette County — the climate division Marbleton sits in. All-time county record high 91.5°F (2026-07-13); record low -40.9°F (1979-01-01). Source: NOAA / National Weather Service.