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.

Fog/Mist

37°F

3°C

Humidity 97%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 36°F (2°C)
Visibility 1.00 mi
Last update 16 Feb 3:55 am CST
Extended Forecast for

5 Miles E Carlinville IL

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 61. South wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 61 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 41. South wind 7 to 9 mph.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 61. Breezy, with a south wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 61 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 53. Breezy, with a south wind 17 to 22 mph, with gusts as high as 31 mph.

    Low: 53 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 69. Breezy, with a west wind 10 to 20 mph, with gusts as high as 28 mph.

    High: 69 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68. Chance of precipitation is 40%.

    High: 68 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 35.

    Low: 35 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after noon. Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

Washington's Birthday
Partly sunny, with a high near 61. South wind 6 to 14 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 41. South wind 7 to 9 mph.
Tuesday
Mostly cloudy, with a high near 61. Breezy, with a south wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.
Tuesday Night
A 30 percent chance of showers after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 53. Breezy, with a south wind 17 to 22 mph, with gusts as high as 31 mph.
Wednesday
Sunny, with a high near 69. Breezy, with a west wind 10 to 20 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68. Chance of precipitation is 40%.
Thursday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 35.
Friday
A 20 percent chance of showers after noon. Partly sunny, with a high near 48.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 28.
Saturday
A 20 percent chance of showers. Partly sunny, with a high near 46.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 25.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Carlinville IL
 39.27°N 89.8°W (Elev. 650 ft)
Last Update:
3:36 am CST Feb 16, 2026
Forecast Valid:
4am CST Feb 16, 2026-6pm CST Feb 22, 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