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

50°F

10°C

Humidity 58%
Wind Speed SE 10 mph
Barometer 29.91 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 7 Jan 5:45 pm CST
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: Increasing clouds, with a low around 45. Southeast wind around 9 mph.

    Low: 45 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Rain and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 65. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.

    High: 65 °F

    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Cloudy, then gradually becoming partly cloudy, with a low around 50. South wind 10 to 18 mph becoming west after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 70%.

    Low: 50 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 56. West wind 7 to 10 mph becoming north in the afternoon.

    High: 56 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 38. North wind 5 to 8 mph.

    Low: 38 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before noon. Partly sunny, with a high near 44.

    High: 44 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 45. Southeast wind around 9 mph.
Thursday
Rain and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 65. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm. Cloudy, then gradually becoming partly cloudy, with a low around 50. South wind 10 to 18 mph becoming west after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 70%.
Friday
Partly sunny, with a high near 56. West wind 7 to 10 mph becoming north in the afternoon.
Friday Night
A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 38. North wind 5 to 8 mph.
Saturday
A 20 percent chance of rain before noon. Partly sunny, with a high near 44.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 35.
Sunday Night
Mostly clear, with a low around 24.
Monday
Sunny, with a high near 47.
Monday Night
Mostly clear, with a low around 32.
Tuesday
Mostly sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
5:21 pm CST Jan 7, 2026
Forecast Valid:
6pm CST Jan 7, 2026-6pm CST Jan 14, 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