The official National Weather Service forecast for Darien — 31.3702°N, 81.434°W, 3 miles from I-95. Forecasts here are written by NWS CHS, this county’s forecast office.
| McIntosh County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 63 | 66 | 72 | 78 | 85 | 90 | 92 | 91 | 87 | 79 | 71 | 65 | 78 |
| Avg low °F | 41 | 44 | 50 | 56 | 64 | 71 | 73 | 73 | 69 | 60 | 50 | 44 | 58 |
| Precip in | 2.9 | 3.2 | 3.5 | 3.2 | 3.0 | 5.5 | 5.6 | 6.6 | 5.3 | 3.4 | 2.0 | 3.1 | 47.3 |
1996–2025 normals for McIntosh County — the climate division Darien sits in. All-time county record high 103.8°F (2022-06-24); record low 6.9°F (1985-01-21). Source: NOAA / National Weather Service.