Weather WorldAffton, MO 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Affton, MO Weather Forecast
Affton, MO Weather Forecast Date: 147 AM CDT Tue Sep 08 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... Mostly clear. Lows in the lower 60s. East winds around 5 mph.
Tuesday... Mostly sunny. Highs in the mid 90s. Southeast winds around 5 mph.
Tuesday Night... Mostly clear. Not as cool with lows in the lower 70s. South winds around 5 mph.
Wednesday... Partly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph, becoming west in the afternoon. Chance of rain 50%. Heat index values up to 106.
Wednesday Night... Showers and thunderstorms likely in the evening, then showers with a chance of thunderstorms after midnight. Locally heavy rainfall possible after midnight. Humid with lows around 70. West winds around 5 mph. Chance of rain near 100%.
Thursday... A slight chance of thunderstorms. Showers, mainly in the morning. Much cooler with highs around 80. Chance of rain near 100%.
Thursday Night... Partly cloudy. Lows in the lower 60s. Highs in the mid 80s.
Friday... Partly cloudy. Lows in the lower 60s. Highs in the mid 80s.
Friday Night... Mostly clear. A slight chance of showers after midnight. Lows in the upper 60s. Chance of rain 20%.
Saturday... Partly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50%.
Saturday Night... Partly cloudy with a 40% chance of showers. Lows in the upper 60s.
Sunday... Mostly sunny. A chance of showers in the morning. Highs in the upper 80s. Chance of rain 30%.
Sunday Night... Partly cloudy with a 20% chance of showers. Lows in the upper 60s.
POP = Probability of Precipitation
Affton Radar Loop
Use the map search tool if you want to place a location marker on the radar map...