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

63°F

17°C

Humidity 75%
Wind Speed W 7 mph
Barometer 29.89 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 31 May 12:35 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Overnight

    Overnight: Partly cloudy, with a low around 60. West wind 6 to 8 mph.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 86. Northwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. Northwest wind 5 to 8 mph becoming light and variable.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 83. Light and variable wind becoming northeast around 5 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59. Northeast wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 89.

    High: 89 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 60. West wind 6 to 8 mph.
Saturday
Mostly sunny, with a high near 86. Northwest wind 9 to 14 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 59. Northwest wind 5 to 8 mph becoming light and variable.
Sunday
Sunny, with a high near 83. Light and variable wind becoming northeast around 5 mph.
Sunday Night
Mostly clear, with a low around 59. Northeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 89.
Tuesday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 66. Chance of precipitation is 70%.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 78. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
10:07 pm CDT May 30, 2025
Forecast Valid:
12am CDT May 31, 2025-6pm CDT Jun 6, 2025
 
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