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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fog/Mist

50°F

10°C

Humidity 96%
Wind Speed N 8 mph
Barometer 29.99 in (1015.5 mb)
Dewpoint 49°F (9°C)
Visibility 5.00 mi
Wind Chill47°F (8°C)
Last update 22 Nov 12:53 am CST
Extended Forecast for

Affton MO

  • Overnight

    Overnight: Patchy drizzle and fog. Cloudy, with a low around 46. North wind 3 to 6 mph.

    Low: 46 °F

    Patchy
    Drizzle and
    Patchy Fog

  • Saturday

    Saturday: Patchy drizzle before 7am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 56. North wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 56 °F

    Patchy
    Drizzle and
    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41. West wind 3 to 6 mph.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 61. Northwest wind around 6 mph becoming calm in the morning.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 44. Calm wind becoming southeast around 5 mph after midnight.

    Low: 44 °F

    Mostly Cloudy

  • Monday

    Monday: Rain, mainly after noon. High near 58. Chance of precipitation is 80%.

    High: 58 °F

    Chance Rain
    then Rain

  • Monday Night

    Monday Night: Rain, mainly before midnight. Low around 51. Chance of precipitation is 80%.

    Low: 51 °F

    Rain then
    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Partly sunny, with a high near 62.

    High: 62 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy drizzle and fog. Cloudy, with a low around 46. North wind 3 to 6 mph.
Saturday
Patchy drizzle before 7am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 56. North wind 5 to 7 mph becoming light and variable in the afternoon.
Saturday Night
Mostly clear, with a low around 41. West wind 3 to 6 mph.
Sunday
Sunny, with a high near 61. Northwest wind around 6 mph becoming calm in the morning.
Sunday Night
Mostly cloudy, with a low around 44. Calm wind becoming southeast around 5 mph after midnight.
Monday
Rain, mainly after noon. High near 58. Chance of precipitation is 80%.
Monday Night
Rain, mainly before midnight. Low around 51. Chance of precipitation is 80%.
Tuesday
A 20 percent chance of rain after noon. Partly sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 36.
Wednesday
Mostly sunny, with a high near 49.
Wednesday Night
Partly cloudy, with a low around 31.
Thanksgiving Day
Mostly sunny, with a high near 47.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 31.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Affton MO
 38.56°N 90.32°W (Elev. 564 ft)
Last Update:
11:26 pm CST Nov 21, 2025
Forecast Valid:
1am CST Nov 22, 2025-6pm CST Nov 28, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation