The official National Weather Service forecast for Henderson — 35.4392°N, 88.6414°W, population 5,906, 19.9 miles from I-40.
| Chester County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 49 | 54 | 63 | 73 | 80 | 87 | 90 | 90 | 84 | 74 | 62 | 53 | 72 |
| Avg low °F | 29 | 33 | 40 | 47 | 57 | 65 | 69 | 67 | 60 | 48 | 38 | 33 | 49 |
| Precip in | 4.7 | 5.3 | 5.8 | 5.5 | 5.2 | 4.4 | 4.2 | 4.0 | 4.0 | 3.7 | 4.1 | 5.1 | 56.0 |
1996–2025 normals for Chester County — the climate division Henderson sits in. All-time county record high 106.5°F (1952-07-28); record low -18.0°F (1951-02-02). Source: NOAA / National Weather Service.