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

68°F

20°C

Humidity 56%
Wind Speed SE 5 mph
Barometer 30.11 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 10 Oct 10:50 am CDT
Extended Forecast for

Carlinville IL

  • Today

    Today: Mostly sunny, with a high near 82. Southeast wind around 7 mph.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 50. Southeast wind around 6 mph becoming calm in the evening.

    Low: 50 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 86. Calm wind.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 61. Calm wind becoming south around 5 mph.

    Low: 61 °F

    Increasing
    Clouds

  • Columbus Day

    Columbus Day: Sunny, with a high near 93. Southwest wind 5 to 11 mph.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 59.

    Low: 59 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 78. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly sunny, with a high near 82. Southeast wind around 7 mph.
Tonight
Partly cloudy, with a low around 50. Southeast wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 86. Calm wind.
Sunday Night
Increasing clouds, with a low around 61. Calm wind becoming south around 5 mph.
Columbus Day
Sunny, with a high near 93. Southwest wind 5 to 11 mph.
Monday Night
Clear, with a low around 68.
Tuesday
Sunny, with a high near 91.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 59.
Wednesday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 78. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 76.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 50.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 68.
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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:
11:46 am CDT Oct 10, 2026
Forecast Valid:
11am CDT Oct 10, 2026-6pm CDT Oct 16, 2026
 
Forecast Discussion
 
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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