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Spring Brook, IL 7-Day Night Weather Forecast
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Spring Brook, IL Weather Forecast
Spring Brook, IL Weather Forecast Date: 1156 PM CDT Sat Sep 19 2026
The area/counties/county of: La Salle, including the cities of: Ottawa, Streator, La Salle, Mendota, and Marseilles.or toggle through each period.
Overnight... Patchy fog. A chance of thunderstorms late in the evening. Showers. Thunderstorms likely after midnight. Some thunderstorms May produce heavy rainfall late in the evening. Some thunderstorms May produce heavy rainfall after midnight. Locally heavy rainfall possible after midnight. Near steady temperature around 70. East winds around 5 mph. Chance of precipitation near 100%.
Sunday... Patchy fog early in the morning. Showers with a slight chance of thunderstorms until late afternoon. A chance of showers late. Near steady temperature in the upper 60s. Northeast winds 10 to 15 mph. Gusts up to 25 mph in the afternoon. Chance of precipitation near 100%.
Sunday Night... Mostly cloudy. A chance of showers early in the evening. A slight chance of showers late in the evening, then a chance of showers after midnight. Lows in the upper 50s. Northeast winds 10 to 15 mph. Gusts up to 25 mph in the evening. Chance of precipitation 50%.
Monday... Mostly cloudy. Showers likely, mainly in the morning. Highs in the mid 60s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of precipitation 60%.
Monday Night... Mostly cloudy. A chance of showers. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of precipitation 50%.
Tuesday... Mostly cloudy. A chance of showers, mainly in the morning. Highs in the mid 60s. Chance of precipitation 30%.
Tuesday Night... Mostly cloudy. Lows in the lower 50s.
Wednesday... Mostly cloudy. Highs in the mid 60s.
Wednesday Night... Partly cloudy. Lows in the mid 50s.
Thursday... Partly cloudy in the morning, then becoming mostly cloudy. Highs in the upper 60s.
Thursday Night... Mostly cloudy. Lows in the mid 50s.
Friday... Mostly cloudy. Highs in the lower 70s.
Friday Night... Partly cloudy. Lows in the mid 50s.
POP = Probability of Precipitation
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