The official National Weather Service forecast for Allendale — 33.0079°N, 81.3084°W, 32.8 miles from I-95. Forecasts here are written by NWS CHS, this county’s forecast office.
| Allendale County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 60 | 64 | 70 | 77 | 84 | 90 | 92 | 90 | 86 | 78 | 69 | 62 | 77 |
| Avg low °F | 35 | 39 | 45 | 51 | 60 | 68 | 71 | 70 | 65 | 54 | 43 | 38 | 53 |
| Precip in | 3.6 | 3.7 | 3.7 | 3.1 | 3.6 | 4.9 | 5.7 | 5.4 | 3.9 | 2.8 | 2.7 | 3.8 | 46.9 |
1996–2025 normals for Allendale County — the climate division Allendale sits in. All-time county record high 104.7°F (1986-07-20); record low -0.5°F (1985-01-21). Source: NOAA / National Weather Service.