Johnsonville, IL Weather & Growing Conditions
Tonight
57°F
Rain Showers
Rain showers. Mostly cloudy. Low around 57, with temperatures rising to around 59 overnight. South wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Rain Showers | 9 to 15 mph S | 97% |
| Wednesday | 67°F | Partly Sunny | 7 to 13 mph WSW | 13% |
| Wednesday Night | 44°F | Partly Cloudy | 3 mph WSW | 0% |
| Thursday | 68°F | Sunny | 3 to 10 mph WSW | 0% |
| Thursday Night | 44°F | Mostly Cloudy | 3 mph WNW | 5% |
| Friday | 60°F | Mostly Cloudy | 2 to 10 mph NW | 2% |
| Friday Night | 39°F | Partly Cloudy | 2 to 7 mph NNW | 1% |
| Saturday | 57°F | Mostly Sunny | 5 mph NNW | 0% |
| Saturday Night | 35°F | Partly Cloudy | 1 mph NW | 1% |
| Sunday | 62°F | Sunny | 1 to 8 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear | 3 mph NW | 5% |
| Monday | 65°F | Sunny | 1 to 9 mph W | 2% |
| Monday Night | 39°F | Mostly Clear | 5 mph SW | 0% |
| Tuesday | 68°F | Sunny | 2 to 7 mph WSW | 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 (14.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.