Weather WorldLong Lake, MO 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Long Lake, MO Weather Forecast
Long Lake, MO Weather Forecast Date: 152 AM CDT Sun Sep 13 2026
The area/counties/county of: Madison County Il, including the cities of: Alton, Edwardsville, Belleville, Cahokia, Saint Charles, and Saint Louis.or toggle through each period.
Rest of Tonight... Partly cloudy. Near steady temperature in the lower 70s. North winds around 5 mph.
Sunday... Partly sunny. Highs in the upper 80s. North winds 5 to 10 mph.
Sunday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 60s. Northeast winds 5 to 10 mph.
Monday... Partly sunny. Highs in the upper 80s. Southeast winds 10 to 15 mph.
Monday Night... Mostly clear. Lows in the lower 70s. Southeast winds 10 to 15 mph.
Tuesday... Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 20%. Heat index values up to 105.
Tuesday Night... Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 50%. Heat index values up to 105 early in the evening.
Wednesday... Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 20%. Heat index values up to 105 in the afternoon.
Wednesday Night... Partly cloudy. Lows in the lower 70s. Heat index values up to 100 early in the evening.
Thursday... Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20%. Heat index values up to 100.
Thursday Night... A chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows around 70. Chance of rain 30%.
Friday... Mostly sunny with a 20% chance of showers. Highs in the upper 80s.
Friday Night... Partly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the mid 60s. Chance of rain 30%.
POP = Probability of Precipitation
Long Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...