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.

Overcast

69°F

21°C

Humidity 74%
Wind Speed S 8 mph
Barometer 29.96 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 13 Apr 3:15 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Overnight

    Overnight: Partly cloudy, with a low around 66. Southwest wind around 11 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 85. South wind 9 to 17 mph, with gusts as high as 24 mph.

    High: 85 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. South wind 11 to 17 mph, with gusts as high as 28 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 88 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 69 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.

    High: 82 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 63. Chance of precipitation is 80%.

    Low: 63 °F

    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 7am. Mostly sunny, with a high near 84. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 66. Southwest wind around 11 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 85. South wind 9 to 17 mph, with gusts as high as 24 mph.
Monday Night
Partly cloudy, with a low around 68. South wind 11 to 17 mph, with gusts as high as 28 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind 10 to 14 mph, with gusts as high as 22 mph.
Wednesday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 63. Chance of precipitation is 80%.
Thursday
A chance of showers, with thunderstorms also possible after 7am. Mostly sunny, with a high near 84. Chance of precipitation is 40%.
Thursday Night
Mostly clear, with a low around 62.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87.
Friday Night
Showers and thunderstorms. Low around 60. Chance of precipitation is 80%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 74.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 43.
Sunday
Sunny, with a high near 65.
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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:
1:26 am CDT Apr 13, 2026
Forecast Valid:
3am CDT Apr 13, 2026-6pm CDT Apr 19, 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