National Weather Service Forecast for: Affton MO
Issued by: National Weather Service Saint Louis, MO
Updated: 1:26 am CDT Apr 6, 2026
 
Overnight

Overnight: Clear, with a low around 40. West wind 3 to 5 mph.
Clear

 Monday

Monday: Sunny, with a high near 65. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Sunny

 Monday
Night
Monday Night: Increasing clouds, with a low around 38. Northeast wind 7 to 9 mph.
Increasing
Clouds

 Tuesday

Tuesday: Mostly cloudy, with a high near 55. Northeast wind 8 to 10 mph.
Mostly Cloudy

 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 40. Southeast wind around 7 mph.
Partly Cloudy

 Wednesday

Wednesday: Partly sunny, with a high near 73.
Partly Sunny

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 55.
Partly Cloudy

 Thursday

Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 71. Chance of precipitation is 30%.
Slight Chance
Showers then
Chance
T-storms
 Thursday
Night
Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Chance
T-storms
Lo 40 °F Hi 65 °F Lo 38 °F Hi 55 °F Lo 40 °F Hi 73 °F Lo 55 °F Hi 71 °F Lo 58 °F

 

Overnight
 
 Clear, with a low around 40. West wind 3 to 5 mph.
Monday
 
 Sunny, with a high near 65. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Monday Night
 
 Increasing clouds, with a low around 38. Northeast wind 7 to 9 mph.
Tuesday
 
 Mostly cloudy, with a high near 55. Northeast wind 8 to 10 mph.
Tuesday Night
 
 Partly cloudy, with a low around 40. Southeast wind around 7 mph.
Wednesday
 
 Partly sunny, with a high near 73.
Wednesday Night
 
 Partly cloudy, with a low around 55.
Thursday
 
 A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 71. Chance of precipitation is 30%.
Thursday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Friday
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 74.
Friday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Saturday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Saturday Night
 
 A 20 percent chance of showers. Partly cloudy, with a low around 62.
Sunday
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.

 

Forecast from NOAA-NWS for Affton MO.