The official National Weather Service forecast for Royston — 34.2871°N, 83.1102°W, 13.1 miles from I-85. Forecasts here are written by NWS GSP, this county’s forecast office.
| Franklin County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 53 | 58 | 65 | 73 | 80 | 87 | 90 | 88 | 83 | 74 | 64 | 56 | 73 |
| Avg low °F | 32 | 36 | 42 | 48 | 57 | 65 | 69 | 68 | 62 | 51 | 40 | 35 | 50 |
| Precip in | 4.7 | 4.2 | 4.6 | 3.9 | 3.8 | 4.2 | 4.2 | 4.1 | 3.8 | 3.2 | 3.3 | 4.7 | 48.7 |
1996–2025 normals for Franklin County — the climate division Royston sits in. All-time county record high 105.1°F (2012-07-02); record low -2.7°F (1985-01-21). Source: NOAA / National Weather Service.