The official National Weather Service forecast for Brownstown — 38.8789°N, 86.0419°W, 11.4 miles from I-65. Forecasts here are written by NWS IND, this county’s forecast office.
| Jackson County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 44 | 55 | 66 | 75 | 83 | 86 | 85 | 80 | 68 | 55 | 44 | 65 |
| Avg low °F | 23 | 25 | 34 | 42 | 53 | 61 | 65 | 63 | 56 | 44 | 34 | 27 | 44 |
| Precip in | 3.6 | 3.1 | 4.4 | 5.0 | 5.3 | 5.1 | 4.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.7 | 48.2 |
1996–2025 normals for Jackson County — the climate division Brownstown sits in. All-time county record high 104.1°F (2012-06-29); record low -22.4°F (1994-01-19). Source: NOAA / National Weather Service.