National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

73°F

23°C

Humidity 17%
Wind Speed W 13 mph
Barometer 29.83 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 27 Feb 4:50 pm CST
Extended Forecast for

2 Miles NNE Bethalto IL

Red Flag Warning February 27, 04:54pm until February 27, 06:00pm
Click here for hazard details and duration
...
  •  
    Red Flag Warning February 27, 04:54pm until February 27, 06:00pm

    NOW until 6:00pm Fri

    Red Flag Warning

  • Tonight

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of rain between 3pm and 5pm. Mostly sunny, with a high near 63. Northeast wind 6 to 10 mph becoming south in the afternoon. Chance of precipitation is 20%.

    High: 63 °F

    Sunny then
    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29. South wind 6 to 13 mph becoming north in the evening. Winds could gust as high as 21 mph.

    Low: 29 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of rain after noon, mixing with snow after 3pm. Mostly cloudy, with a high near 45. Northeast wind around 11 mph. Chance of precipitation is 20%.

    High: 45 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow before 3am, then rain, snow, and freezing rain likely. Low around 31. East wind around 10 mph. Chance of precipitation is 80%. Little or no ice accumulation expected. New snow accumulation of less than one inch possible.

    Low: 31 °F

    Wintry Mix

  • Monday

    Monday: A chance of rain, snow, and freezing rain before noon, then a slight chance of rain. Cloudy, with a high near 43. Chance of precipitation is 40%.

    High: 43 °F

    Chance Wintry
    Mix then
    Slight Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly after midnight. Cloudy, with a low around 37. Chance of precipitation is 70%.

    Low: 37 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 56. Chance of precipitation is 80%.

    High: 56 °F

    Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 36. Southwest wind 6 to 9 mph becoming northeast after midnight.
Saturday
A slight chance of rain between 3pm and 5pm. Mostly sunny, with a high near 63. Northeast wind 6 to 10 mph becoming south in the afternoon. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 29. South wind 6 to 13 mph becoming north in the evening. Winds could gust as high as 21 mph.
Sunday
A slight chance of rain after noon, mixing with snow after 3pm. Mostly cloudy, with a high near 45. Northeast wind around 11 mph. Chance of precipitation is 20%.
Sunday Night
Rain and snow before 3am, then rain, snow, and freezing rain likely. Low around 31. East wind around 10 mph. Chance of precipitation is 80%. Little or no ice accumulation expected. New snow accumulation of less than one inch possible.
Monday
A chance of rain, snow, and freezing rain before noon, then a slight chance of rain. Cloudy, with a high near 43. Chance of precipitation is 40%.
Monday Night
Rain likely, mainly after midnight. Cloudy, with a low around 37. Chance of precipitation is 70%.
Tuesday
Rain and possibly a thunderstorm. High near 56. Chance of precipitation is 80%.
Tuesday Night
Rain likely, with thunderstorms also possible after midnight. Cloudy, with a low around 46. Chance of precipitation is 70%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 63. Chance of precipitation is 70%.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Thursday
Rain likely. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 51.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Bethalto IL
 38.92°N 90.02°W (Elev. 512 ft)
Last Update:
1:36 pm CST Feb 27, 2026
Forecast Valid:
4pm CST Feb 27, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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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