Junction, IL Weather & Growing Conditions
Tonight
58°F
Showers And Thunderstorms
A chance of rain showers before 9pm, then showers and thunderstorms. Mostly cloudy. Low around 58, with temperatures rising to around 60 overnight. South wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Showers And Thunderstorms | 6 to 14 mph S | 99% |
| Wednesday | 69°F | Partly Sunny | 6 to 10 mph SW | 12% |
| Wednesday Night | 44°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 69°F | Sunny | 1 to 7 mph SW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 mph W | 4% |
| Friday | 62°F | Partly Sunny | 1 to 9 mph NNW | 5% |
| Friday Night | 39°F | Mostly Cloudy | 2 to 6 mph NNW | 2% |
| Saturday | 57°F | Mostly Sunny | 5 mph NNW | 0% |
| Saturday Night | 34°F | Partly Cloudy | 1 mph NNW | 1% |
| Sunday | 61°F | Sunny | 0 to 6 mph WNW | 6% |
| Sunday Night | 34°F | Mostly Clear | 3 mph WNW | 7% |
| Monday | 64°F | Sunny | 1 to 7 mph W | 2% |
| Monday Night | 37°F | Mostly Clear | 1 to 5 mph SW | 0% |
| Tuesday | 68°F | Sunny | 2 to 6 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Junction, IL
Last spring frost
Apr 7
First fall frost
Oct 26
Growing season
202 days
Hardiness zone
7a
Explore more for Junction, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Harrisburg, Il (14.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.