Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

80°F

27°C

Humidity 87%
Wind Speed S 6 mph
Barometer 29.93 in
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 10 Jun 1:15 am CDT
Extended Forecast for

3 Miles SSE Carlinville IL

  • Overnight

    Overnight: Mostly clear, with a low around 71. South wind around 6 mph.

    Low: 71 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 91. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 91 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am.  Mostly cloudy, with a low around 72. South wind 7 to 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 93. Heat index values as high as 101. South wind 8 to 17 mph, with gusts as high as 28 mph.

    High: 93 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 7pm, then showers and possibly a thunderstorm between 7pm and 1am.  Low around 62. Southwest wind 6 to 14 mph becoming northwest after midnight. Winds could gust as high as 23 mph.  Chance of precipitation is 90%.

    Low: 62 °F

    Showers

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly before 1pm.  Mostly sunny, with a high near 86.

    High: 86 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 66. Chance of precipitation is 70%.

    Low: 66 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 71. South wind around 6 mph.
Wednesday
Mostly sunny, with a high near 91. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 72. South wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 93. Heat index values as high as 101. South wind 8 to 17 mph, with gusts as high as 28 mph.
Thursday Night
A chance of showers and thunderstorms before 7pm, then showers and possibly a thunderstorm between 7pm and 1am. Low around 62. Southwest wind 6 to 14 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 61.
Saturday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 86.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 58.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 75.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 55.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Carlinville IL
 39.25°N 89.86°W (Elev. 551 ft)
1:26 am CDT Jun 10, 2026
1am CDT Jun 10, 2026-6pm CDT Jun 16, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database