Weather WorldTri-City, IL 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Tri-City, IL Weather Forecast
Tri-City, IL Weather Forecast Date: 520 AM CDT Thu Oct 29 2026
The area/counties/county of: La Salle, including the cities of: Ottawa, Streator, La Salle, Mendota, and Marseilles.or toggle through each period.
Today... Mostly cloudy in the morning, then becoming partly cloudy. Isolated showers early in the morning. Highs in the upper 60s. Southwest winds around 10 mph, becoming northwest in the afternoon. Chance of precipitation 20%.
Tonight... Clear, cooler with lows in the lower 40s. North winds around 5 mph.
Friday... Partly cloudy in the morning, then becoming mostly cloudy. A chance of showers late. Highs in the mid 60s. East winds around 5 mph. Chance of precipitation 30%.
Friday Night... Mostly cloudy. A chance of showers in the evening, then showers with a slight chance of thunderstorms after midnight. Lows in the lower 50s. East winds 5 to 10 mph. Chance of precipitation 80%.
Saturday... Cloudy. Showers likely, mainly in the morning. Highs in the mid 60s. Southeast winds 5 to 10 mph. Chance of precipitation 70%.
Saturday Night... Mostly cloudy. Lows in the lower 50s.
Sunday... Mostly cloudy with a 20% chance of showers. Highs in the upper 60s.
Sunday Night... Mostly cloudy. A slight chance of showers in the evening. Lows in the lower 50s. Chance of precipitation 20%.
Monday... Mostly cloudy with a 40% chance of showers. Highs around 70.
Monday Night... Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 50s. Chance of precipitation 60%.
Tuesday... Showers likely. Highs around 70. Chance of precipitation 70%.
Tuesday Night... Mostly cloudy. Showers likely, mainly in the evening. Lows in the lower 50s. Chance of precipitation 60%.
POP = Probability of Precipitation
Tri-City Radar Loop
Use the map search tool if you want to place a location marker on the radar map...