The official National Weather Service forecast for Buffalo — 34.7257°N, 81.6834°W, 14.8 miles from I-26. Forecasts here are written by NWS GSP, this county’s forecast office.
| Union County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 54 | 58 | 66 | 74 | 81 | 88 | 91 | 89 | 84 | 74 | 64 | 56 | 73 |
| Avg low °F | 31 | 35 | 41 | 48 | 57 | 65 | 69 | 68 | 62 | 50 | 39 | 34 | 50 |
| Precip in | 3.8 | 3.4 | 4.0 | 3.7 | 3.8 | 3.8 | 3.9 | 3.9 | 3.8 | 2.9 | 3.2 | 4.3 | 44.5 |
1996–2025 normals for Union County — the climate division Buffalo sits in. All-time county record high 105.8°F (1983-08-22); record low -1.4°F (1985-01-22). Source: NOAA / National Weather Service.