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.

Fair

72°F

22°C

Humidity 33%
Wind Speed S 8 mph
Barometer 30.01 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 14 May 4:50 pm CDT
Extended Forecast for

Carlinville IL

  • Tonight

    Tonight: A chance of showers, then showers likely and possibly a thunderstorm after 4am. Increasing clouds, with a low around 51. Southeast wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 51 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers and thunderstorms likely before 10am, then a slight chance of showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 78. South wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 62. South wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Partly sunny, with a high near 82. Southwest wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61. South wind 7 to 9 mph.

    Low: 61 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 87. Breezy.

    High: 87 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Breezy.

    High: 87 °F

    Chance
    T-storms and
    Breezy

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Breezy.

    Low: 67 °F

    Chance
    T-storms and
    Breezy

Detailed Forecast

Tonight
A chance of showers, then showers likely and possibly a thunderstorm after 4am. Increasing clouds, with a low around 51. Southeast wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely before 10am, then a slight chance of showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 78. South wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 62. South wind 9 to 11 mph, with gusts as high as 20 mph.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Partly sunny, with a high near 82. Southwest wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Saturday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61. South wind 7 to 9 mph.
Sunday
Sunny, with a high near 87. Breezy.
Sunday Night
Mostly clear, with a low around 65.
Monday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Breezy.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Breezy.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 76.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Thursday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Carlinville IL
 39.3°N 89.89°W (Elev. 623 ft)
Last Update:
3:01 pm CDT May 14, 2026
Forecast Valid:
5pm CDT May 14, 2026-6pm CDT May 21, 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