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.

Mostly Cloudy

73°F

23°C

Humidity 61%
Wind Speed Vrbl 7 mph
Barometer 30.14 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 16 Oct 11:50 am CDT
Extended Forecast for

Carlinville IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 80. Southeast wind around 8 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 58. Southeast wind 7 to 10 mph, with gusts as high as 23 mph.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny during the morning, then cloudy during the afternoon, with a high near 81. South wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 81 °F

    Becoming
    Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of showers after 1am. Mostly cloudy, then gradually becoming clear, with a low around 62. South wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 10am. High near 79. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 79 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 47. Chance of precipitation is 80%.

    Low: 47 °F

    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Sunny, with a high near 64.

    High: 64 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 80. Southeast wind around 8 mph.
Tonight
Mostly clear, with a low around 58. Southeast wind 7 to 10 mph, with gusts as high as 23 mph.
Friday
Mostly sunny during the morning, then cloudy during the afternoon, with a high near 81. South wind 8 to 13 mph, with gusts as high as 20 mph.
Friday Night
A 20 percent chance of showers after 1am. Mostly cloudy, then gradually becoming clear, with a low around 62. South wind 8 to 11 mph, with gusts as high as 22 mph.
Saturday
Showers, with thunderstorms also possible after 10am. High near 79. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 47. Chance of precipitation is 80%.
Sunday
A 20 percent chance of showers before 1pm. Sunny, with a high near 64.
Sunday Night
Clear, with a low around 41.
Monday
Sunny, with a high near 70.
Monday Night
A 30 percent chance of showers, mainly after 1am. Partly cloudy, with a low around 49.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 71.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carlinville IL
 39.27°N 89.89°W (Elev. 614 ft)
Last Update:
12:06 pm CDT Oct 16, 2025
Forecast Valid:
12pm CDT Oct 16, 2025-6pm CDT Oct 22, 2025
 
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