The official National Weather Service forecast for St. Marys — 30.7305°N, 81.5465°W, 6.5 miles from I-95. Forecasts here are written by NWS JAX, this county’s forecast office.
| Camden County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 64 | 68 | 73 | 80 | 85 | 90 | 92 | 91 | 87 | 80 | 72 | 67 | 79 |
| Avg low °F | 41 | 45 | 50 | 56 | 63 | 70 | 73 | 73 | 69 | 60 | 50 | 45 | 58 |
| Precip in | 2.9 | 3.3 | 3.6 | 3.2 | 3.3 | 5.9 | 5.8 | 7.0 | 6.0 | 3.4 | 2.0 | 3.0 | 49.4 |
1996–2025 normals for Camden County — the climate division St. Marys sits in. All-time county record high 102.8°F (2022-06-24); record low 8.1°F (1985-01-22). Source: NOAA / National Weather Service.