The official National Weather Service forecast for Wellsburg — 40.272°N, 80.6095°W, 12.6 miles from I-70.
| Brooke County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 37 | 41 | 51 | 63 | 72 | 80 | 84 | 82 | 77 | 65 | 52 | 42 | 62 |
| Avg low °F | 21 | 24 | 30 | 39 | 49 | 58 | 62 | 61 | 55 | 44 | 34 | 27 | 42 |
| Precip in | 3.1 | 2.7 | 3.2 | 3.7 | 4.4 | 4.6 | 3.9 | 3.9 | 3.5 | 3.1 | 2.7 | 3.0 | 41.8 |
1996–2025 normals for Brooke County — the climate division Wellsburg sits in. All-time county record high 99.7°F (1988-07-08); record low -21.3°F (1994-01-19). Source: NOAA / National Weather Service.