The official National Weather Service forecast for Georgetown — 31.8715°N, 90.1645°W, 14.5 miles from I-55. Forecasts here are written by NWS JAN, this county’s forecast office.
| Copiah County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 59 | 63 | 71 | 77 | 84 | 90 | 92 | 92 | 88 | 79 | 69 | 62 | 77 |
| Avg low °F | 37 | 41 | 47 | 53 | 62 | 69 | 71 | 70 | 65 | 54 | 44 | 39 | 54 |
| Precip in | 5.8 | 5.5 | 5.9 | 5.4 | 4.4 | 4.6 | 5.3 | 4.9 | 3.7 | 3.3 | 4.3 | 5.4 | 58.5 |
1996–2025 normals for Copiah County — the climate division Georgetown sits in. All-time county record high 105.8°F (2000-08-31); record low 2.0°F (1962-01-12). Source: NOAA / National Weather Service.