Johnsonville, IL Weather & Growing Conditions
Today
85°F
Sunny
Sunny. High near 85, with temperatures falling to around 83 in the afternoon. East northeast wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 1 mph ENE | 0% |
| Tonight | 63°F | Mostly Clear | 1 mph NE | 0% |
| Wednesday | 87°F | Sunny | 1 mph S | 0% |
| Wednesday Night | 68°F | Partly Cloudy | 2 mph S | 14% |
| Thursday | 86°F | Chance Showers And Thunderstorms | 2 to 6 mph SSW | 44% |
| Thursday Night | 69°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 mph SSE | 60% |
| Friday | 86°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 to 5 mph SW | 57% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 2 mph SSW | 36% |
| Saturday | 87°F | Chance Showers And Thunderstorms | 3 mph SSW | 36% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 mph S | 18% |
| Sunday | 89°F | Sunny | 3 to 8 mph SSW | 9% |
| Sunday Night | 72°F | Mostly Clear | 7 mph SSW | 7% |
| Monday | 90°F | Sunny | 5 to 9 mph SW | 8% |
| Monday Night | 73°F | Partly Cloudy | 7 mph SSW | 13% |
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 Aug 4, 2026.