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Janssen, IL 7-Day Night Weather Forecast
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Janssen, IL Weather Forecast
Janssen, IL Weather Forecast Date: 526 AM CDT Tue Sep 08 2026
The area/counties/county of: Stephenson, including the city of Freeport.or toggle through each period.
Today... Partly sunny. Highs in the mid 80s. South winds 5 to 10 mph.
Tonight... Cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Warmer with lows around 70. Southwest winds 5 to 10 mph. Chance of rain 70%.
Wednesday... Cloudy with showers likely with a chance of thunderstorms in the morning, then partly sunny in the afternoon. Humid with highs in the lower 80s. West winds 5 to 10 mph. Chance of rain 60%.
Wednesday Night... Mostly clear. Cooler with lows in the upper 50s. Northwest winds around 5 mph.
Thursday... Sunny. Highs in the upper 70s. North winds around 5 mph.
Thursday Night... Clear. Lows in the lower 50s.
Friday... Sunny. Highs around 80.
Friday Night... Partly cloudy. A chance of showers after midnight. Lows in the lower 60s. Chance of rain 40%.
Saturday... Partly sunny. A chance of showers in the morning. Highs around 80. Chance of rain 40%.
Saturday Night... Partly cloudy. A chance of showers after midnight. Lows in the upper 50s. Chance of rain 40%.
Sunday... Partly sunny with a 40% chance of showers. Highs in the upper 70s.
Sunday Night... Mostly cloudy. A chance of showers. Lows around 60. Highs in the upper 70s. Chance of rain 40%.
POP = Probability of Precipitation
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