National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Fire Weather Concerns West; Thunderstorms in the Upper Midwest

Dry and breezy conditions will enhance fire weather concerns across portions of the northern and central High Plains through Saturday, where fuels remain largely receptive. Severe thunderstorms are possible across portions of central Nebraska to the Upper Midwest this Friday afternoon into tonight. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fog/Mist

67°F

19°C

Humidity 100%
Wind Speed Calm
Barometer 29.97 in (1014.6 mb)
Dewpoint 67°F (19°C)
Visibility 6.00 mi
Last update 11 Sep 2:53 am CDT
Extended Forecast for

Affton MO

  • Overnight

    Overnight: Patchy fog. Otherwise, cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Patchy Fog

  • Friday

    Friday: A 30 percent chance of showers, mainly between 11am and 3pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 83. Light and variable wind.

    High: 83 °F

    Chance
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.

    High: 91 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, cloudy, with a low around 69. Calm wind.
Friday
A 30 percent chance of showers, mainly between 11am and 3pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 83. Light and variable wind.
Friday Night
Partly cloudy, with a low around 70. Calm wind.
Saturday
Mostly sunny, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 70. Calm wind.
Sunday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 72.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Wednesday
A 50 percent chance of showers. Mostly sunny, with a high near 89.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Affton MO
 38.56°N 90.32°W (Elev. 564 ft)
Last Update:
10:01 pm CDT Sep 10, 2026
Forecast Valid:
3am CDT Sep 11, 2026-6pm CDT Sep 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation