Johnsonville, IL Weather & Growing Conditions
Today
64°F
Mostly Cloudy
Mostly cloudy. High near 64, with temperatures falling to around 61 in the afternoon. West southwest wind 6 to 12 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Mostly Cloudy | 6 to 12 mph WSW | 9% |
| Tonight | 43°F | Partly Cloudy | 5 mph WSW | 0% |
| Thursday | 66°F | Sunny | 3 to 10 mph WSW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 mph WNW | 0% |
| Friday | 58°F | Partly Sunny | 3 to 12 mph NNW | 1% |
| Friday Night | 36°F | Partly Cloudy | 2 to 7 mph NNW | 0% |
| Saturday | 56°F | Mostly Sunny | 2 to 6 mph NNW | 0% |
| Saturday Night | 32°F | Partly Cloudy | 2 mph NNW | 0% |
| Sunday | 60°F | Sunny | 0 to 7 mph WNW | 1% |
| Sunday Night | 34°F | Clear | 2 mph NW | 1% |
| Monday | 64°F | Sunny | 0 to 6 mph WSW | 0% |
| Monday Night | 38°F | Clear | 2 mph SW | 0% |
| Tuesday | 68°F | Sunny | 1 to 5 mph W | 1% |
| Tuesday Night | 40°F | Mostly Clear | 1 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Johnsonville, IL
Last spring frost
Apr 9
First fall frost
Oct 24
Growing season
198 days
Hardiness zone
6b
Explore more for Johnsonville, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Flora, Il (7.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.