The official National Weather Service forecast for Brookville — 39.8367°N, 84.4113°W, population 6,372, 1.4 miles from I-70.
| Montgomery County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 37 | 41 | 52 | 64 | 74 | 82 | 85 | 84 | 79 | 66 | 53 | 42 | 63 |
| Avg low °F | 22 | 24 | 32 | 42 | 52 | 61 | 64 | 63 | 55 | 44 | 34 | 27 | 43 |
| Precip in | 3.1 | 2.6 | 3.6 | 4.2 | 4.4 | 4.6 | 4.2 | 3.0 | 3.2 | 3.0 | 2.8 | 3.2 | 41.9 |
1996–2025 normals for Montgomery County — the climate division Brookville sits in. All-time county record high 101.8°F (2012-06-29); record low -24.5°F (1994-01-19). Source: NOAA / National Weather Service.