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Olson, IL 7-Day Night Weather Forecast
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Olson, IL Weather Forecast
Olson, IL Weather Forecast Date: 1221 AM CDT Wed Sep 09 2026
The area/counties/county of: Winnebago, including the city of Rockford.or toggle through each period.
Rest of Tonight... A slight chance of thunderstorms after midnight. Showers. A chance of thunderstorms late. Near steady temperature in the lower 70s. Southwest winds 5 to 10 mph. Chance of precipitation 90%.
Wednesday... Mostly cloudy. Numerous showers early in the morning. A slight chance of thunderstorms in the morning. Scattered showers late in the morning. Humid with highs in the lower 80s. West winds 5 to 10 mph. Chance of precipitation 70%.
Wednesday Night... Partly cloudy. Lows in the upper 50s. Northwest winds around 5 mph.
Thursday... Partly cloudy in the morning, then becoming mostly sunny. Highs in the mid 70s. North winds around 5 mph.
Thursday Night... Clear. Lows in the lower 50s. Light and variable winds.
Friday... Sunny. Highs in the lower 80s.
Friday Night... Mostly clear in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the upper 50s. Chance of precipitation 20%.
Saturday... Mostly cloudy. A chance of showers in the morning, then a slight chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of precipitation 30%.
Saturday Night... Mostly cloudy with a chance of showers. Lows in the upper 50s. Chance of precipitation 40%.
Sunday... Partly cloudy in the morning, then becoming mostly cloudy. A chance of showers. Highs in the upper 70s. Chance of precipitation 30%.
Sunday Night... Mostly cloudy with a chance of showers. Lows in the upper 50s. Chance of precipitation 40%.
Monday... Mostly cloudy with a chance of showers. Highs in the upper 70s. Chance of precipitation 50%.
Monday Night... Showers likely. Lows in the lower 60s. Chance of precipitation 60%.
POP = Probability of Precipitation
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