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Lostant, IL 7-Day Night Weather Forecast
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Lostant, IL Weather Forecast
Lostant, IL Weather Forecast Date: 1141 PM CDT Fri Sep 04 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... Partly cloudy. A slight chance of showers and thunderstorms after midnight. Patchy fog late. Lows in the mid 70s. Southwest winds around 5 mph. Chance of precipitation 20%.
Saturday... Mostly sunny. Patchy fog early in the morning. Humid with highs around 90. North winds 5 to 10 mph. Heat index values up to 100.
Saturday Night... Mostly clear. Lows in the mid 60s. Northeast winds 5 to 10 mph.
Sunday... Mostly sunny. Highs in the lower 80s. East winds 5 to 10 mph.
Sunday Night... Mostly clear. Lows in the lower 60s. East winds around 5 mph.
Labor Day... Mostly sunny in the morning, then becoming partly cloudy. Highs in the lower 80s.
Monday Night... Partly cloudy. Lows in the mid 60s.
Tuesday... Partly cloudy. Highs around 90.
Tuesday Night... Partly cloudy. Lows in the lower 70s.
Wednesday... Partly cloudy. Hot with highs in the lower 90s.
Wednesday Night... Partly cloudy. A chance of showers after midnight. Lows in the upper 60s. Chance of precipitation 40%.
Thursday... Partly cloudy. Highs in the lower 80s.
Thursday Night... Partly cloudy. Lows in the lower 60s.
POP = Probability of Precipitation
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