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

61°F

16°C

Humidity 27%
Wind Speed SW 3 mph
Barometer 29.86 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 27 Feb 6:50 pm CST
Extended Forecast for

5 Miles E Carlinville IL

  • Tonight

    Tonight: Mostly clear, with a low around 33. Southwest wind 6 to 8 mph becoming northeast after midnight.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 61. Northeast wind 7 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 33. Southwest wind 6 to 8 mph becoming northeast after midnight.
Saturday
Mostly sunny, with a high near 61. Northeast wind 7 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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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Carlinville IL
 39.27°N 89.8°W (Elev. 650 ft)
Last Update:
5:06 pm CST Feb 27, 2026
Forecast Valid:
7pm CST Feb 27, 2026-6pm CST Mar 6, 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