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

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

19°F

-7°C

Humidity 61%
Wind Speed NW 7 mph
Barometer 30.11 in
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 15 Jan 4:55 am CST
Extended Forecast for

Carlinville IL

  • Today

    Today: Increasing clouds, with a high near 31. Northwest wind 7 to 9 mph becoming south in the afternoon.

    High: 31 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Snow likely before 1am, then scattered flurries after 5am. Mostly cloudy, with a low around 26. South wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Snow Likely
    then Chance
    Snow

  • Friday

    Friday: Partly sunny, with a high near 41. West wind 11 to 17 mph, with gusts as high as 26 mph.

    High: 41 °F

    Partly Sunny

  • Friday Night

    Friday Night: Scattered snow showers. Mostly cloudy, with a low around 18. West wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    Low: 18 °F

    Scattered
    Snow Showers

  • Saturday

    Saturday: Partly sunny, with a high near 22. West wind 11 to 16 mph, with gusts as high as 23 mph.

    High: 22 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 8.

    Low: 8 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 10.

    Low: 10 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 21.

    High: 21 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 31. Northwest wind 7 to 9 mph becoming south in the afternoon.
Tonight
Snow likely before 1am, then scattered flurries after 5am. Mostly cloudy, with a low around 26. South wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday
Partly sunny, with a high near 41. West wind 11 to 17 mph, with gusts as high as 26 mph.
Friday Night
Scattered snow showers. Mostly cloudy, with a low around 18. West wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 22. West wind 11 to 16 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 8.
Sunday
Mostly sunny, with a high near 24.
Sunday Night
Partly cloudy, with a low around 10.
M.L.King Day
Mostly sunny, with a high near 21.
Monday Night
Mostly clear, with a low around 6.
Tuesday
Sunny, with a high near 26.
Tuesday Night
Partly cloudy, with a low around 16.
Wednesday
Mostly sunny, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carlinville IL
 39.27°N 89.89°W (Elev. 614 ft)
Last Update:
4:26 am CST Jan 15, 2026
Forecast Valid:
5am CST Jan 15, 2026-6pm CST Jan 21, 2026
 
Forecast Discussion
 
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Additional Resources

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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