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

55°F

13°C

Humidity 77%
Wind Speed NW 15 G 21 mph
Barometer 30.12 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 16 Oct 4:35 am CDT
Extended Forecast for

Mount Clare IL

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

  • Today

    Today: A 20 percent chance of showers after 2pm. Mostly cloudy, with a high near 54. Breezy, with a northwest wind 18 to 20 mph, with gusts as high as 33 mph.

    High: 54 °F

    Breezy.
    Partly Sunny
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: Patchy frost after 5am. Otherwise, mostly cloudy during the early evening, then gradual clearing, with a low around 35. North wind 8 to 17 mph, with gusts as high as 26 mph.

    Low: 35 °F

    Mostly Cloudy
    then Patchy
    Frost

  • Saturday

    Saturday: Areas of frost before 9am. Otherwise, sunny, with a high near 59. North wind around 6 mph becoming calm in the afternoon.

    High: 59 °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: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers after 2pm. Mostly cloudy, with a high near 54. Breezy, with a northwest wind 18 to 20 mph, with gusts as high as 33 mph.
Tonight
Patchy frost after 5am. Otherwise, mostly cloudy during the early evening, then gradual clearing, with a low around 35. North wind 8 to 17 mph, with gusts as high as 26 mph.
Saturday
Areas of frost before 9am. Otherwise, sunny, with a high near 59. North wind around 6 mph becoming calm in the afternoon.
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
Mostly clear, with a low around 36.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Clare IL
 39.1°N 89.84°W (Elev. 656 ft)
Last Update:
4:21 am CDT Oct 16, 2026
Forecast Valid:
4am CDT Oct 16, 2026-6pm CDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation