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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast

50°F

10°C

Humidity 88%
Wind Speed NW 13 mph
Barometer 30.34 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 16 Oct 6:45 pm CDT
Extended Forecast for

6 Miles ESE Chesterfield IL

Frost Advisory October 17, 01:00am until October 17, 09:00am
Click here for hazard details and duration
Frost Advisory

  • Tonight

    Tonight: A 20 percent chance of showers before 9pm. Patchy frost after 4am. Otherwise, mostly cloudy during the early evening, then gradual clearing, with a low around 34. North wind 6 to 15 mph, with gusts as high as 22 mph.

    Low: 34 °F

    Slight Chance
    Showers then
    Patchy Frost

  • Saturday

    Saturday: Areas of frost before 9am. Otherwise, sunny, with a high near 60. North wind around 5 mph becoming calm in the morning.

    High: 60 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 32. Calm wind.

    Low: 32 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 66. Calm wind becoming south 5 to 7 mph in the morning.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 35. Calm wind.

    Low: 35 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers before 9pm. Patchy frost after 4am. Otherwise, mostly cloudy during the early evening, then gradual clearing, with a low around 34. North wind 6 to 15 mph, with gusts as high as 22 mph.
Saturday
Areas of frost before 9am. Otherwise, sunny, with a high near 60. North wind around 5 mph becoming calm in the morning.
Saturday Night
Clear, with a low around 32. Calm wind.
Sunday
Sunny, with a high near 66. Calm wind becoming south 5 to 7 mph in the morning.
Sunday Night
Clear, with a low around 35. Calm wind.
Monday
Sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 39.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Clear, with a low around 42.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 46.
Friday
Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Chesterfield IL
 39.21°N 89.98°W (Elev. 568 ft)
Last Update:
5:01 pm CDT Oct 16, 2026
Forecast Valid:
7pm CDT Oct 16, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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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