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

62°F

17°C

Humidity 84%
Wind Speed S 14 mph
Barometer 29.76 in
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 15 Nov 5:35 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Mostly sunny, with a high near 78. South wind 8 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 43. North wind 6 to 10 mph, with gusts as high as 21 mph.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 59. North wind 5 to 7 mph.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. Light and variable wind.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 59. Light east wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 59 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Showers likely before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.

    Low: 46 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 61.

    High: 61 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 78. South wind 8 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Tonight
Mostly clear, with a low around 43. North wind 6 to 10 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 59. North wind 5 to 7 mph.
Sunday Night
Mostly clear, with a low around 37. Light and variable wind.
Monday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 59. Light east wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
Showers likely before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.
Tuesday
Partly sunny, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 43.
Wednesday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 61.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Thursday
Rain. High near 63. Chance of precipitation is 80%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 64.
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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:
3:16 am CST Nov 15, 2025
Forecast Valid:
5am CST Nov 15, 2025-6pm CST Nov 21, 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