The official National Weather Service forecast for Madison — 38.0671°N, 81.8193°W, 18.3 miles from I-77.
| Boone County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 48 | 57 | 68 | 76 | 82 | 85 | 84 | 79 | 68 | 57 | 47 | 66 |
| Avg low °F | 25 | 28 | 34 | 42 | 51 | 60 | 64 | 63 | 56 | 45 | 34 | 29 | 44 |
| Precip in | 3.6 | 3.6 | 3.9 | 4.3 | 5.1 | 4.6 | 5.6 | 4.1 | 3.3 | 3.2 | 3.0 | 3.7 | 48.0 |
1996–2025 normals for Boone County — the climate division Madison sits in. All-time county record high 100.1°F (2012-06-30); record low -18.0°F (1994-01-19). Source: NOAA / National Weather Service.