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 33%
Wind Speed SW 7 mph
Barometer 29.89 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 27 Feb 8:50 pm CST
Extended Forecast for

5 Miles E Carlinville IL

  • Tonight

    Tonight: Mostly clear, with a low around 34. West wind 8 to 10 mph becoming northeast after midnight.

    Low: 34 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 61. Northeast wind 8 to 11 mph becoming south in the afternoon.

    High: 61 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26. Southeast wind 7 to 14 mph becoming northwest in the evening. Winds could gust as high as 22 mph.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 42. Northeast wind around 11 mph.

    High: 42 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain and snow likely before 3am, then snow and freezing rain likely. Cloudy, with a low around 29. East wind around 10 mph. Chance of precipitation is 70%. New ice accumulation of less than a 0.1 of an inch possible. New snow accumulation of around an inch possible.

    Low: 29 °F

    Wintry Mix
    Likely

  • Monday

    Monday: A chance of rain, snow, and freezing rain before noon, then a slight chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 30%.

    High: 42 °F

    Chance Wintry
    Mix then
    Slight Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly after midnight. Cloudy, with a low around 35. Chance of precipitation is 70%.

    Low: 35 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 54. Chance of precipitation is 80%.

    High: 54 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain likely, with thunderstorms also possible after midnight. Cloudy, with a low around 42. Chance of precipitation is 70%.

    Low: 42 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 34. West wind 8 to 10 mph becoming northeast after midnight.
Saturday
Mostly sunny, with a high near 61. Northeast wind 8 to 11 mph becoming south in the afternoon.
Saturday Night
Partly cloudy, with a low around 26. Southeast wind 7 to 14 mph becoming northwest in the evening. Winds could gust as high as 22 mph.
Sunday
Mostly cloudy, with a high near 42. Northeast wind around 11 mph.
Sunday Night
Rain and snow likely before 3am, then snow and freezing rain likely. Cloudy, with a low around 29. East wind around 10 mph. Chance of precipitation is 70%. New ice accumulation of less than a 0.1 of an inch possible. New snow accumulation of around an inch possible.
Monday
A chance of rain, snow, and freezing rain before noon, then a slight chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 30%.
Monday Night
Rain likely, mainly after midnight. Cloudy, with a low around 35. Chance of precipitation is 70%.
Tuesday
Rain and possibly a thunderstorm. High near 54. Chance of precipitation is 80%.
Tuesday Night
Rain likely, with thunderstorms also possible after midnight. Cloudy, with a low around 42. Chance of precipitation is 70%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 61. Chance of precipitation is 60%.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Thursday
Rain likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 49.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
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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:
7:56 pm CST Feb 27, 2026
Forecast Valid:
9pm CST Feb 27, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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