The official National Weather Service forecast for Charleston — 35.2873°N, 84.7583°W, 3.1 miles from I-75.
| Bradley County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 50 | 55 | 63 | 72 | 79 | 86 | 89 | 88 | 83 | 73 | 62 | 53 | 71 |
| Avg low °F | 30 | 33 | 40 | 47 | 56 | 64 | 68 | 67 | 60 | 49 | 38 | 33 | 49 |
| Precip in | 4.9 | 5.1 | 5.2 | 4.9 | 4.5 | 4.4 | 4.7 | 4.2 | 4.3 | 3.0 | 4.3 | 5.3 | 54.8 |
1996–2025 normals for Bradley County — the climate division Charleston sits in. All-time county record high 104.4°F (1980-07-17); record low -11.3°F (1985-01-21). Source: NOAA / National Weather Service.