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.

Fog/Mist

36°F

2°C

Humidity 87%
Wind Speed N 16 mph
Barometer 30.10 in
Dewpoint 32°F (0°C)
Visibility 4.00 mi
Wind Chill26°F (-3°C)
Last update 7 Dec 12:50 pm CST
Extended Forecast for

Carlinville IL

  • This Afternoon

    This Afternoon: Cloudy, with a high near 37. North wind 11 to 14 mph, with gusts as high as 21 mph.

    High: 37 °F

    Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 16. North wind 5 to 10 mph becoming light after midnight.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 30. Light and variable wind.

    High: 30 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a temperature rising to around 29 by 2am. Light south wind increasing to 5 to 10 mph in the evening. Winds could gust as high as 20 mph.

    Low: 24 °F⇑

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 47. Southwest wind 11 to 13 mph, with gusts as high as 20 mph.

    High: 47 °F

    Partly Sunny

  • Tuesday Night

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

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy
    then Chance
    Snow

  • Thursday

    Thursday: A 40 percent chance of snow. Mostly cloudy, with a high near 33.

    High: 33 °F

    Chance Snow

Detailed Forecast

This Afternoon
Cloudy, with a high near 37. North wind 11 to 14 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, with a low around 16. North wind 5 to 10 mph becoming light after midnight.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 30. Light and variable wind.
Monday Night
Partly cloudy, with a temperature rising to around 29 by 2am. Light south wind increasing to 5 to 10 mph in the evening. Winds could gust as high as 20 mph.
Tuesday
Partly sunny, with a high near 47. Southwest wind 11 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 44.
Wednesday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 24.
Thursday
A 40 percent chance of snow. Mostly cloudy, with a high near 33.
Thursday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 12.
Friday
Mostly sunny, with a high near 21.
Friday Night
Mostly cloudy, with a low around 1.
Saturday
Partly sunny and cold, with a high near 17.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carlinville IL
 39.27°N 89.89°W (Elev. 614 ft)
Last Update:
11:06 am CST Dec 7, 2025
Forecast Valid:
1pm CST Dec 7, 2025-6pm CST Dec 13, 2025
 
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