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

63°F

17°C

Humidity 73%
Wind Speed S 17 G 26 mph
Barometer 29.87 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 9 Mar 10:50 am CDT
Extended Forecast for

5 Miles W Carlinville IL

  • Today

    Today: Mostly sunny, with a high near 76. Breezy, with a south wind 17 to 20 mph.

    High: 76 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 58. South wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers between 3pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 79. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Chance of precipitation is 20%.

    High: 79 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 51. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.

    Low: 51 °F

    Showers
    Likely then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Temperature rising to near 59 by 10am, then falling to around 47 during the remainder of the day. Breezy, with a southwest wind 15 to 23 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.

    High: 59 °F⇓

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. Breezy.

    Low: 41 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 76. Breezy, with a south wind 17 to 20 mph.
Tonight
Partly cloudy, with a low around 58. South wind 10 to 14 mph, with gusts as high as 21 mph.
Tuesday
A slight chance of showers between 3pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 79. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Chance of precipitation is 20%.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 51. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Wednesday
Showers and possibly a thunderstorm. Temperature rising to near 59 by 10am, then falling to around 47 during the remainder of the day. Breezy, with a southwest wind 15 to 23 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Wednesday Night
Partly cloudy, with a low around 29.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Mostly cloudy, with a low around 41. Breezy.
Friday
Partly sunny, with a high near 59.
Friday Night
Mostly cloudy, with a low around 35.
Saturday
Partly sunny, with a high near 62.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 44.
Sunday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 64. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Carlinville IL
 39.3°N 89.97°W (Elev. 623 ft)
Last Update:
11:31 am CDT Mar 9, 2026
Forecast Valid:
11am CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation