Areas of Heavy to Excessive Rainfall and Hot Temperatures This Week

Heavy to excessive rainfall could bring areas of flooding at times Monday through Thursday across parts of the central Plains into the Midwest as well as southern Arizona and New Mexico. Hot temperatures and high humidity will continue across much of east Texas into the lower and mid-Mississippi Valley through at least midweek. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

72°F

22°C

Humidity 59%
Wind Speed N 8 mph
Barometer 30.11 in (1019.2 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 13 Sep 9:53 pm CDT
Extended Forecast for

Affton MO

  • Tonight

    Tonight: Partly cloudy, with a low around 66. Northeast wind around 7 mph.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers between 11am and noon.  Sunny, with a high near 87. East wind 7 to 9 mph.  Chance of precipitation is 20%.

    High: 87 °F

    Slight Chance
    Showers then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. Southeast wind 7 to 9 mph.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm.  Sunny and hot, with a high near 98. Heat index values as high as 106. Southwest wind 5 to 8 mph.

    High: 98 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 74. Light and variable wind.

    Low: 74 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after 1pm.  Mostly sunny, with a high near 95. Chance of precipitation is 20%.

    High: 95 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 66. Northeast wind around 7 mph.
Monday
A slight chance of showers between 11am and noon. Sunny, with a high near 87. East wind 7 to 9 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 74. Southeast wind 7 to 9 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 98. Heat index values as high as 106. Southwest wind 5 to 8 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 74. Light and variable wind.
Wednesday
Mostly sunny, with a high near 95.
Wednesday Night
Partly cloudy, with a low around 75.
Thursday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 95. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 73.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.
Friday Night
Partly cloudy, with a low around 71.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 90.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Affton MO
 38.56°N 90.32°W (Elev. 564 ft)
9:11 pm CDT Sep 13, 2026
10pm CDT Sep 13, 2026-6pm CDT Sep 20, 2026
 
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Additional Resources

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Hourly Weather Forecast

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