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Sinnissippi Park Sterling, IL 7-Day Night Weather Forecast
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Sinnissippi Park Sterling, IL Weather Forecast
Sinnissippi Park Sterling, IL Weather Forecast Date: 546 PM CDT Fri Aug 14 2026
The area/counties/county of: Whiteside, including the city of Sterling.or toggle through each period.
Tonight... Mostly cloudy. A chance of showers and thunderstorms this evening, then showers with thunderstorms likely after midnight. Some thunderstorms May produce heavy rainfall. Locally heavy rainfall possible after midnight. Lows around 70. East winds 5 to 10 mph. Chance of rain 90%.
Saturday... Mostly cloudy. Showers with a chance of thunderstorms in the morning. Some thunderstorms May produce heavy rainfall in the morning. Locally heavy rainfall possible in the morning. Humid with highs in the upper 80s. Southeast winds 5 to 10 mph, becoming southwest in the afternoon. Chance of rain 90%. Heat index values up to 107 in the afternoon.
Saturday Night... Mostly cloudy. A chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. West winds around 5 mph. Chance of rain 50%. Heat index values up to 106 early in the evening.
Sunday... Mostly cloudy in the morning, then becoming mostly sunny. A chance of showers in the morning. Humid with highs in the mid 80s. Northwest winds 5 to 10 mph. Chance of rain 40%.
Sunday Night... Mostly clear. Humid with lows in the lower 60s. Northwest winds 5 to 10 mph.
Monday... Mostly clear. Highs in the lower 80s. Lows in the lower 60s.
Monday Night... Mostly clear. Highs in the lower 80s. Lows in the lower 60s.
Tuesday... Mostly sunny. Highs in the lower 80s.
Tuesday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 60s. Chance of rain 60%.
Wednesday... Mostly cloudy with a chance of showers in the morning, then partly sunny in the afternoon. Highs around 80. Chance of rain 30%.
Wednesday Night... Partly cloudy. Lows around 60. Highs in the upper 70s.
Thursday... Partly cloudy. Lows around 60. Highs in the upper 70s.
POP = Probability of Precipitation
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