The official National Weather Service forecast for Boone — 42.0597°N, 93.8802°W, population 12,357, 15.9 miles from I-35.
| Boone County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 29 | 33 | 47 | 61 | 72 | 82 | 84 | 82 | 77 | 64 | 48 | 34 | 59 |
| Avg low °F | 11 | 15 | 27 | 38 | 49 | 60 | 64 | 61 | 53 | 40 | 28 | 17 | 39 |
| Precip in | 0.9 | 1.1 | 2.0 | 3.6 | 5.1 | 5.3 | 4.2 | 4.1 | 3.1 | 2.8 | 1.6 | 1.3 | 35.1 |
1996–2025 normals for Boone County — the climate division Boone sits in. All-time county record high 104.1°F (1988-08-16); record low -28.9°F (1996-02-03). Source: NOAA / National Weather Service.