The official National Weather Service forecast for Clayton — 31.8782°N, 85.4497°W. Forecasts here are written by NWS BMX, this county’s forecast office.
| Barbour County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 59 | 64 | 71 | 77 | 84 | 89 | 92 | 91 | 87 | 78 | 69 | 61 | 77 |
| Avg low °F | 36 | 41 | 46 | 52 | 60 | 68 | 71 | 70 | 65 | 54 | 44 | 39 | 54 |
| Precip in | 4.9 | 4.3 | 4.8 | 4.7 | 3.8 | 4.7 | 5.1 | 4.8 | 4.2 | 2.6 | 3.5 | 5.3 | 52.7 |
1996–2025 normals for Barbour County — the climate division Clayton sits in. All-time county record high 103.8°F (1980-07-15); record low 0.5°F (1985-01-21). Source: NOAA / National Weather Service.