The official National Weather Service forecast for Pelham — 35.3101°N, 85.8808°W, 1.6 miles from I-24.
| Grundy County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 46 | 51 | 59 | 68 | 75 | 82 | 84 | 84 | 79 | 69 | 58 | 50 | 67 |
| Avg low °F | 27 | 31 | 38 | 45 | 54 | 61 | 65 | 64 | 57 | 47 | 37 | 31 | 46 |
| Precip in | 6.0 | 5.8 | 5.9 | 5.8 | 5.2 | 5.4 | 5.0 | 4.3 | 4.6 | 3.5 | 4.6 | 6.1 | 62.2 |
1996–2025 normals for Grundy County — the climate division Pelham sits in. All-time county record high 102.0°F (2012-06-30); record low -19.8°F (1985-01-21). Source: NOAA / National Weather Service.