The official National Weather Service forecast for Cottageville — 32.9368°N, 80.4809°W, 11.6 miles from I-95. Forecasts here are written by NWS CHS, this county’s forecast office.
| Colleton County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 60 | 64 | 70 | 78 | 84 | 89 | 92 | 90 | 86 | 78 | 69 | 63 | 77 |
| Avg low °F | 37 | 40 | 46 | 52 | 61 | 69 | 72 | 71 | 66 | 55 | 45 | 40 | 54 |
| Precip in | 3.1 | 3.5 | 3.4 | 3.2 | 3.4 | 5.3 | 6.0 | 6.5 | 4.7 | 3.4 | 2.6 | 3.6 | 48.7 |
1996–2025 normals for Colleton County — the climate division Cottageville sits in. All-time county record high 103.9°F (1986-07-20); record low 2.6°F (1985-01-21). Source: NOAA / National Weather Service.