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.

Mostly Cloudy

61°F

16°C

Humidity 31%
Wind Speed SW 13 mph
Barometer 30.22 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 29 Mar 11:50 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 69. South wind around 14 mph, with gusts as high as 21 mph.

    High: 69 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. South wind around 11 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 84. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64. South wind around 14 mph, with gusts as high as 24 mph.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain, then a chance of rain and thunderstorms after 10am. Partly sunny, with a high near 86. South wind 13 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    High: 86 °F

    Slight Chance
    T-storms then
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 56. Chance of precipitation is 80%.

    Low: 56 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 67. Chance of precipitation is 80%.

    High: 67 °F

    Rain

  • Wednesday Night

    Wednesday Night: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Cloudy, with a low around 46. Chance of precipitation is 70%.

    Low: 46 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely and possibly a thunderstorm. Cloudy, with a high near 63. Chance of precipitation is 70%.

    High: 63 °F

    Rain Likely

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 69. South wind around 14 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, with a low around 57. South wind around 11 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 84. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 64. South wind around 14 mph, with gusts as high as 24 mph.
Tuesday
A slight chance of rain, then a chance of rain and thunderstorms after 10am. Partly sunny, with a high near 86. South wind 13 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 56. Chance of precipitation is 80%.
Wednesday
Rain and possibly a thunderstorm. High near 67. Chance of precipitation is 80%.
Wednesday Night
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Cloudy, with a low around 46. Chance of precipitation is 70%.
Thursday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 63. Chance of precipitation is 70%.
Thursday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Friday
A 40 percent chance of rain. Partly sunny, with a high near 75.
Friday Night
Rain and thunderstorms likely. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
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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:
11:56 am CDT Mar 29, 2026
Forecast Valid:
12pm CDT Mar 29, 2026-6pm CDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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