National Weather Service Forecast for: Affton MO
Issued by: National Weather Service Saint Louis, MO
Updated: 7:26 am CDT May 26, 2026
 
Today

Today: A 20 percent chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 80. Calm wind becoming east around 6 mph in the afternoon.
Mostly Cloudy
then Slight
Chance
T-storms
 Tonight

Tonight: A chance of showers and thunderstorms before midnight, then a chance of showers between midnight and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Chance
Showers

 Wednesday

Wednesday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 10am, then a slight chance of showers and thunderstorms after 10am. Partly sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 20%.
Slight Chance
T-storms

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 65. Light east wind.
Partly Cloudy

 Thursday

Thursday: Partly sunny, with a high near 85. Northeast wind 3 to 8 mph.
Partly Sunny

 Thursday
Night
Thursday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 65.
Mostly Cloudy
then Slight
Chance
Showers
 Friday

Friday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 81.
Slight Chance
Showers

 Friday
Night
Friday Night: Mostly cloudy, with a low around 62.
Mostly Cloudy

 Saturday

Saturday: Partly sunny, with a high near 82.
Partly Sunny
Hi 80 °F Lo 64 °F Hi 83 °F Lo 65 °F Hi 85 °F Lo 65 °F Hi 81 °F Lo 62 °F Hi 82 °F

Hazardous Weather Outlook
 

Today
 
 A 20 percent chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 80. Calm wind becoming east around 6 mph in the afternoon.
Tonight
 
 A chance of showers and thunderstorms before midnight, then a chance of showers between midnight and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Wednesday
 
 A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 10am, then a slight chance of showers and thunderstorms after 10am. Partly sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
 
 Partly cloudy, with a low around 65. Light east wind.
Thursday
 
 Partly sunny, with a high near 85. Northeast wind 3 to 8 mph.
Thursday Night
 
 A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 65.
Friday
 
 A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 81.
Friday Night
 
 Mostly cloudy, with a low around 62.
Saturday
 
 Partly sunny, with a high near 82.
Saturday Night
 
 Partly cloudy, with a low around 61.
Sunday
 
 Mostly sunny, with a high near 81.
Sunday Night
 
 Partly cloudy, with a low around 60.
Monday
 
 Mostly sunny, with a high near 82.

 

Forecast from NOAA-NWS for Affton MO.