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

60°F

16°C

Humidity 90%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 Apr 11:15 pm CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: Mostly clear, with a low around 58. South wind 3 to 5 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly after 4am. Increasing clouds, with a low around 62. South wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    Low: 62 °F

    Partly Cloudy
    then T-storms
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 73. South wind around 10 mph becoming west in the afternoon. Chance of precipitation is 80%.

    High: 73 °F

    T-storms then
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 53. North wind around 7 mph.

    Low: 53 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 54.

    Low: 54 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.

    Low: 62 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 58. South wind 3 to 5 mph.
Thursday
Sunny, with a high near 84. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
Thursday Night
Showers and thunderstorms likely, mainly after 4am. Increasing clouds, with a low around 62. South wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Friday
Showers and possibly a thunderstorm. High near 73. South wind around 10 mph becoming west in the afternoon. Chance of precipitation is 80%.
Friday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 53. North wind around 7 mph.
Saturday
Sunny, with a high near 76.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 54.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Monday
Showers and possibly a thunderstorm. High near 79. Breezy. Chance of precipitation is 80%.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 52.
Tuesday
Mostly sunny, with a high near 71.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 69.
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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:
10:31 pm CDT Apr 22, 2026
Forecast Valid:
11pm CDT Apr 22, 2026-6pm CDT Apr 29, 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