The official National Weather Service forecast for Delco — 34.3157°N, 78.2247°W, 9 miles from I-140. Forecasts here are written by NWS ILM, this county’s forecast office.
| Columbus County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 57 | 60 | 67 | 75 | 82 | 88 | 90 | 89 | 84 | 76 | 67 | 60 | 75 |
| Avg low °F | 34 | 37 | 42 | 50 | 59 | 67 | 71 | 70 | 64 | 53 | 42 | 37 | 52 |
| Precip in | 3.1 | 3.4 | 3.4 | 3.4 | 4.0 | 4.8 | 6.1 | 6.4 | 6.4 | 3.4 | 3.1 | 3.7 | 51.2 |
1996–2025 normals for Columbus County — the climate division Delco sits in. All-time county record high 104.4°F (1952-06-27); record low 0.4°F (1985-01-21). Source: NOAA / National Weather Service.