Junction City, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Junction City, a village in Marion County, Illinois.
Today
86°F
Sunny
Sunny, with a high near 86. Southeast wind around 2 mph.
7-day forecast for Junction City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 2 mph SE | 0% |
| Tonight | 65°F | Mostly Clear | 2 mph SE | 0% |
| Wednesday | 88°F | Sunny | 1 mph S | 2% |
| Wednesday Night | 70°F | Partly Cloudy then Chance Showers And Thunderstorms | 2 mph S | 33% |
| Thursday | 86°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 mph SW | 58% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 2 mph S | 54% |
| Friday | 86°F | Chance Showers And Thunderstorms | 2 mph SW | 54% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 1 mph SW | 34% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 2 mph SW | 34% |
| Saturday Night | 71°F | Partly Cloudy | 2 mph S | 12% |
| Sunday | 90°F | Sunny | 2 to 7 mph S | 9% |
| Sunday Night | 72°F | Mostly Clear | 6 mph S | 5% |
| Monday | 92°F | Sunny | 3 to 7 mph SW | 6% |
| Monday Night | 73°F | Partly Cloudy | 6 mph SW | 11% |
Forecast source: National Weather Service (api.weather.gov) for Junction City (38.575, -89.127). Updated through the day.
Growing snapshot for Junction City
Last spring frost
Apr 9
First fall frost
Oct 26
Growing season
197 days
Hardiness zone
6b
More local growing data for Junction City: nearby ZIP 62882 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Salem, Il (9.3 mi from Junction City). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.