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

57°F

14°C

Humidity 63%
Wind Speed S 10 mph
Barometer 30.13 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 21 Apr 7:50 am CDT
Extended Forecast for

5 Miles E Carlinville IL

  • Today

    Today: Sunny, with a high near 77. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 29 mph.

    High: 77 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Tonight

    Tonight: A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 55. Southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76. Southwest wind 8 to 10 mph.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. South wind around 7 mph.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 80. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 80 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 80%.

    High: 74 °F

    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 52. Chance of precipitation is 20%.

    Low: 52 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 77. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 29 mph.
Tonight
A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 55. Southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 76. Southwest wind 8 to 10 mph.
Wednesday Night
Mostly clear, with a low around 55. South wind around 7 mph.
Thursday
Mostly sunny, with a high near 80. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.
Thursday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Friday
Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 80%.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 52. Chance of precipitation is 20%.
Saturday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 71.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 48.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 72.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Carlinville IL
 39.27°N 89.8°W (Elev. 650 ft)
Last Update:
5:56 am CDT Apr 21, 2026
Forecast Valid:
8am CDT Apr 21, 2026-6pm CDT Apr 27, 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