Brownstown, IL Weather & Growing Conditions
Tonight
56°F
Rain
Rain. Mostly cloudy, with a low around 56. South wind 9 to 15 mph, with gusts as high as 31 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Rain | 9 to 15 mph S | 96% |
| Wednesday | 63°F | Slight Chance Light Rain then Mostly Cloudy | 7 to 13 mph SW | 21% |
| Wednesday Night | 43°F | Partly Cloudy | 6 mph SW | 1% |
| Thursday | 63°F | Sunny | 5 to 12 mph W | 0% |
| Thursday Night | 43°F | Mostly Cloudy | 3 mph NW | 4% |
| Friday | 58°F | Mostly Cloudy | 3 to 9 mph NW | 8% |
| Friday Night | 37°F | Partly Cloudy | 2 to 6 mph N | 2% |
| Saturday | 56°F | Mostly Sunny | 3 mph NW | 1% |
| Saturday Night | 33°F | Partly Cloudy | 1 mph NW | 1% |
| Sunday | 61°F | Sunny | 1 to 7 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear | 3 mph NW | 5% |
| Monday | 64°F | Sunny | 1 to 8 mph W | 2% |
| Monday Night | 38°F | Mostly Clear | 3 mph SW | 1% |
| Tuesday | 67°F | Sunny | 2 to 6 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Brownstown, IL
Last spring frost
Apr 3
First fall frost
Oct 24
Growing season
202 days
Hardiness zone
6b
Explore more for Brownstown, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Brownstown 4 Sw, Il (4.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.