The official National Weather Service forecast for Moundsville — 39.9203°N, 80.7431°W, population 11,398, 9.8 miles from I-70.
| Marshall County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 42 | 52 | 64 | 73 | 81 | 84 | 83 | 77 | 65 | 53 | 43 | 63 |
| Avg low °F | 21 | 24 | 31 | 39 | 49 | 58 | 62 | 61 | 54 | 43 | 33 | 27 | 42 |
| Precip in | 3.9 | 3.2 | 3.8 | 4.1 | 4.7 | 4.6 | 4.4 | 4.0 | 3.7 | 3.4 | 2.9 | 3.6 | 46.3 |
1996–2025 normals for Marshall County — the climate division Moundsville sits in. All-time county record high 99.8°F (2012-07-08); record low -23.8°F (1994-01-19). Source: NOAA / National Weather Service.