Johnsonville, IL Weather & Growing Conditions
Today
98°F
Sunny
Sunny. High near 98, with temperatures falling to around 96 in the afternoon. West southwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Sunny | 7 mph WSW | 7% |
| Tonight | 72°F | Partly Cloudy | 1 to 6 mph SSW | 5% |
| Sunday | 95°F | Mostly Sunny | 5 to 8 mph WSW | 6% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 8 mph NNE | 65% |
| Monday | 82°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 65% |
| Monday Night | 59°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 48% |
| Tuesday | 74°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 to 12 mph NNE | 48% |
| Tuesday Night | 56°F | Mostly Cloudy | 5 to 12 mph NNE | 8% |
| Wednesday | 75°F | Mostly Sunny | 6 to 9 mph N | 8% |
| Wednesday Night | 55°F | Partly Cloudy | 2 to 9 mph N | 3% |
| Thursday | 77°F | Partly Sunny | 3 to 7 mph N | 0% |
| Thursday Night | 57°F | Mostly Cloudy | 1 to 6 mph NNE | 2% |
| Friday | 79°F | Partly Sunny | 2 to 8 mph NNE | 3% |
| Friday Night | 57°F | Partly Cloudy | 2 to 7 mph NNE | 3% |
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 Sep 19, 2026.