The official National Weather Service forecast for Buffalo — 39.9159°N, 81.5201°W, 1.5 miles from I-77.
| Guernsey County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 37 | 41 | 52 | 64 | 73 | 81 | 84 | 83 | 77 | 65 | 53 | 42 | 63 |
| Avg low °F | 21 | 23 | 30 | 40 | 49 | 58 | 62 | 61 | 54 | 43 | 32 | 26 | 42 |
| Precip in | 3.1 | 2.7 | 3.2 | 4.0 | 4.3 | 4.8 | 4.0 | 3.6 | 3.3 | 3.0 | 2.9 | 3.1 | 42.0 |
1996–2025 normals for Guernsey County — the climate division Buffalo sits in. All-time county record high 100.3°F (1953-09-03); record low -25.6°F (1994-01-19). Source: NOAA / National Weather Service.