The official National Weather Service forecast for Hartwell — 34.3529°N, 82.9321°W, population 5,963, 10.6 miles from I-85. Forecasts here are written by NWS GSP, this county’s forecast office.
| Hart County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 54 | 58 | 66 | 74 | 80 | 87 | 90 | 89 | 83 | 74 | 64 | 56 | 73 |
| Avg low °F | 32 | 36 | 42 | 48 | 57 | 65 | 69 | 68 | 62 | 51 | 40 | 35 | 50 |
| Precip in | 4.6 | 4.0 | 4.5 | 3.7 | 3.7 | 4.1 | 4.3 | 4.0 | 3.8 | 3.3 | 3.3 | 4.5 | 47.8 |
1996–2025 normals for Hart County — the climate division Hartwell sits in. All-time county record high 105.2°F (2012-07-02); record low -2.5°F (1985-01-21). Source: NOAA / National Weather Service.