Junction, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Junction, a village in Gallatin County, Illinois.
This Afternoon
100°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Sunny. High near 100, with temperatures falling to around 95 in the afternoon. Southwest wind around 6 mph. Chance of precipitation is 20%.
7-day forecast for Junction
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 100°F | Slight Chance Showers And Thunderstorms | 6 mph SW | 21% |
| Tonight | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph SE | 22% |
| Saturday | 97°F | Sunny | 1 to 6 mph SW | 5% |
| Saturday Night | 73°F | Partly Cloudy | 3 mph SSW | 3% |
| Sunday | 97°F | Sunny | 3 to 7 mph WSW | 6% |
| Sunday Night | 70°F | Partly Cloudy | 5 mph N | 8% |
| Monday | 89°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 9 mph NNE | 36% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 5 to 9 mph NNE | 42% |
| Tuesday | 77°F | Chance Showers And Thunderstorms | 7 to 12 mph N | 35% |
| Tuesday Night | 58°F | Mostly Cloudy | 5 to 12 mph N | 8% |
| Wednesday | 76°F | Mostly Sunny | 5 to 9 mph N | 5% |
| Wednesday Night | 56°F | Partly Cloudy | 2 to 9 mph NNE | 4% |
| Thursday | 77°F | Mostly Sunny | 3 to 8 mph N | 3% |
| Thursday Night | 57°F | Partly Cloudy | 3 to 8 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Junction (37.723, -88.238). Updated through the day.
Growing snapshot for Junction
Last spring frost
Apr 7
First fall frost
Oct 26
Growing season
202 days
Hardiness zone
7a
More local growing data for Junction: nearby ZIP 62954 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Harrisburg, Il (14.1 mi from Junction). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.