The official National Weather Service forecast for Summerville — 34.4806°N, 85.3477°W, population 10,227, 19.8 miles from I-59. Forecasts here are written by NWS FFC, this county’s forecast office.
| Chattooga County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 51 | 56 | 65 | 73 | 80 | 87 | 89 | 89 | 84 | 74 | 63 | 54 | 72 |
| Avg low °F | 31 | 35 | 41 | 48 | 57 | 64 | 68 | 67 | 61 | 50 | 39 | 34 | 50 |
| Precip in | 5.3 | 5.2 | 5.6 | 4.9 | 4.7 | 4.2 | 4.2 | 4.2 | 4.3 | 3.3 | 4.2 | 5.7 | 55.8 |
1996–2025 normals for Chattooga County — the climate division Summerville sits in. All-time county record high 104.8°F (1980-07-18); record low -10.4°F (1985-01-21). Source: NOAA / National Weather Service.