The official National Weather Service forecast for Choctaw Lake — 39.9601°N, 83.4849°W, 2.7 miles from I-70.
| Madison County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 40 | 51 | 64 | 73 | 81 | 84 | 83 | 78 | 65 | 52 | 41 | 62 |
| Avg low °F | 21 | 23 | 31 | 41 | 51 | 60 | 63 | 61 | 54 | 44 | 33 | 26 | 42 |
| Precip in | 2.8 | 2.5 | 3.4 | 4.0 | 4.6 | 4.5 | 4.4 | 3.1 | 3.2 | 2.8 | 2.7 | 3.0 | 41.0 |
1996–2025 normals for Madison County — the climate division Choctaw Lake sits in. All-time county record high 101.9°F (1988-06-26); record low -24.5°F (1994-01-19). Source: NOAA / National Weather Service.