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Junction City, IL Weather Forecast
Junction City, IL Weather Forecast Date: 943 PM CDT Tue Sep 29 2026
The area/counties/county of: Clinton County Il, including the cities of: Centralia and Salem.or toggle through each period.
Tonight... Mostly cloudy. Not as cool with lows in the mid 60s. Southeast winds around 5 mph.
Wednesday... Mostly cloudy in the morning, then becoming mostly sunny. Highs in the upper 80s. South winds 5 to 10 mph.
Wednesday Night... Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 70s. South winds 5 to 10 mph with gusts up to 20 mph.
Thursday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the upper 80s. South winds 10 to 15 mph.
Thursday Night... Cloudy with a slight chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. Southwest winds around 5 mph. Chance of rain 70%.
Friday... Showers with a chance of thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Much cooler with highs in the lower 70s. Chance of rain 90%.
Friday Night... Mostly cloudy with a 20% chance of showers. Lows in the mid 50s. Highs around 70.
Saturday... Mostly cloudy with a 20% chance of showers. Lows in the mid 50s. Highs around 70.
Sunday... Mostly sunny. Highs in the lower 70s.
Sunday Night... Mostly clear. Lows in the lower 50s.
Monday... Clear. Highs in the upper 60s. Lows in the upper 40s.
Monday Night... Clear. Highs in the upper 60s. Lows in the upper 40s.
POP = Probability of Precipitation
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