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City of Rock Falls, ILRock Falls, IL 7-Day Night Weather Forecast
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Rock Falls, IL Weather Forecast
Rock Falls, IL Weather Forecast Date: 242 PM CDT Tue Sep 29 2026
The area/counties/county of: Whiteside, including the city of Sterling.or toggle through each period.
This Afternoon... Mostly cloudy. Highs around 80. South winds around 10 mph.
Tonight... Cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Not as cool with lows in the lower 60s. South winds 5 to 10 mph. Chance of rain 50%.
Wednesday... Showers. More humid with highs in the lower 70s. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain near 100%.
Wednesday Night... Cloudy. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the mid 60s. South winds 5 to 10 mph. Chance of rain 70%.
Thursday... Showers with highs in the lower 70s. South winds around 5 mph, becoming northwest in the afternoon. Chance of rain near 100%.
Thursday Night... Showers likely, mainly in the evening. Cooler with lows in the mid 50s. Chance of rain 70%.
Friday... Partly sunny in the morning, then clearing. Highs in the upper 60s.
Friday Night... Mostly clear. Lows in the mid 40s. Highs in the upper 60s.
Saturday... Mostly clear. Lows in the mid 40s. Highs in the upper 60s.
Saturday Night... Partly cloudy. Lows in the upper 40s. Highs in the upper 60s.
Sunday... Partly cloudy. Lows in the upper 40s. Highs in the upper 60s.
Sunday Night... Mostly clear. Lows in the mid 40s. Highs in the mid 60s.
POP = Probability of Precipitation
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