The official National Weather Service forecast for Weston — 39.0384°N, 80.4673°W, population 4,430, 2.2 miles from I-79.
| Lewis County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 41 | 46 | 56 | 67 | 75 | 82 | 85 | 84 | 79 | 68 | 56 | 46 | 65 |
| Avg low °F | 23 | 26 | 32 | 40 | 49 | 58 | 62 | 62 | 55 | 43 | 33 | 28 | 43 |
| Precip in | 3.7 | 3.5 | 3.9 | 4.2 | 5.2 | 5.1 | 5.2 | 4.1 | 3.7 | 3.6 | 3.1 | 3.7 | 49.0 |
1996–2025 normals for Lewis County — the climate division Weston sits in. All-time county record high 101.3°F (1988-07-17); record low -22.3°F (1994-01-19). Source: NOAA / National Weather Service.