The official National Weather Service forecast for Buchanan — 33.8026°N, 85.1886°W, 7.9 miles from I-20. Forecasts here are written by NWS FFC, this county’s forecast office.
| Haralson County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 53 | 58 | 65 | 73 | 80 | 86 | 88 | 88 | 83 | 74 | 63 | 55 | 72 |
| Avg low °F | 31 | 34 | 41 | 47 | 56 | 64 | 67 | 66 | 60 | 49 | 39 | 35 | 49 |
| Precip in | 5.4 | 5.1 | 5.4 | 4.7 | 4.3 | 4.3 | 4.8 | 4.1 | 3.8 | 3.1 | 4.0 | 5.2 | 54.2 |
1996–2025 normals for Haralson County — the climate division Buchanan sits in. All-time county record high 102.9°F (1952-07-29); record low -9.0°F (1985-01-21). Source: NOAA / National Weather Service.