The official National Weather Service forecast for Grafton — 39.3409°N, 80.019°W, population 4,824, 10.6 miles from I-79.
| Taylor County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 44 | 53 | 65 | 73 | 80 | 83 | 82 | 77 | 66 | 54 | 44 | 63 |
| Avg low °F | 22 | 25 | 31 | 40 | 49 | 57 | 62 | 61 | 54 | 43 | 33 | 27 | 42 |
| Precip in | 3.7 | 3.3 | 3.7 | 4.1 | 5.1 | 5.1 | 5.0 | 4.2 | 3.7 | 3.3 | 2.9 | 3.6 | 47.7 |
1996–2025 normals for Taylor County — the climate division Grafton sits in. All-time county record high 99.7°F (1988-07-17); record low -21.1°F (1994-01-19). Source: NOAA / National Weather Service.