Junction, IL Weather & Growing Conditions
Today
86°F
Sunny
Sunny. High near 86, with temperatures falling to around 84 in the afternoon. North northeast wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 0 to 3 mph NNE | 0% |
| Tonight | 64°F | Mostly Clear | 2 mph NE | 0% |
| Wednesday | 88°F | Sunny | 1 mph SW | 0% |
| Wednesday Night | 68°F | Mostly Clear | 1 mph S | 1% |
| Thursday | 89°F | Slight Chance Rain Showers | 1 to 5 mph SSW | 15% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 3 mph S | 39% |
| Friday | 88°F | Chance Showers And Thunderstorms | 1 to 5 mph SSW | 39% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 2 mph SW | 35% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 3 mph SW | 32% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 mph S | 25% |
| Sunday | 90°F | Sunny | 2 to 6 mph SSW | 10% |
| Sunday Night | 72°F | Mostly Clear | 5 mph SSW | 6% |
| Monday | 92°F | Sunny | 3 to 7 mph SSW | 5% |
| Monday Night | 73°F | Mostly Clear | 5 mph SSW | 9% |
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 Aug 4, 2026.