Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast

66°F

19°C

Humidity 78%
Wind Speed N 8 mph
Barometer 30.00 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 22 Jun 11:50 am CDT
Extended Forecast for

Carlinville IL

  • This Afternoon

    This Afternoon: Cloudy, with a high near 74. North wind 8 to 10 mph.

    High: 74 °F

    Cloudy

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 54. North wind around 5 mph becoming calm  in the evening.

    Low: 54 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Sunny, with a high near 79. Light northeast wind.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 58. Light east wind.

    Low: 58 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 80. South wind around 6 mph.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 60. Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 80.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Cloudy, with a high near 74. North wind 8 to 10 mph.
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 54. North wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 79. Light northeast wind.
Tuesday Night
Increasing clouds, with a low around 58. Light east wind.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80. South wind around 6 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 62.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
Carlinville IL
 39.27°N 89.89°W (Elev. 614 ft)
10:56 am CDT Jun 22, 2026
12pm CDT Jun 22, 2026-6pm CDT Jun 28, 2026
 
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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