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

30°F

-1°C

Humidity 83%
Wind Speed Calm
Barometer 30.32 in
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 12 Feb 12:55 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 54. Southeast wind 3 to 8 mph.

    High: 54 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. Southeast wind 5 to 7 mph.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 58. South wind 5 to 8 mph.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37. Southeast wind around 5 mph becoming calm in the evening.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: Rain likely, mainly after noon. Cloudy, with a high near 52. Chance of precipitation is 60%.

    High: 52 °F

    Chance Rain
    then Rain
    Likely

  • Saturday Night

    Saturday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.

    Low: 42 °F

    Rain Likely

  • Sunday

    Sunday: A 20 percent chance of rain before noon. Mostly sunny, with a high near 59.

    High: 59 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 32. Calm wind.
Thursday
Mostly cloudy, with a high near 54. Southeast wind 3 to 8 mph.
Thursday Night
Mostly cloudy, with a low around 33. Southeast wind 5 to 7 mph.
Friday
Sunny, with a high near 58. South wind 5 to 8 mph.
Friday Night
Mostly cloudy, with a low around 37. Southeast wind around 5 mph becoming calm in the evening.
Saturday
Rain likely, mainly after noon. Cloudy, with a high near 52. Chance of precipitation is 60%.
Saturday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.
Sunday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 59.
Sunday Night
Mostly clear, with a low around 35.
Washington's Birthday
Mostly sunny, with a high near 61.
Monday Night
Mostly cloudy, with a low around 45.
Tuesday
Mostly cloudy, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 67.
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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:
12:26 am CST Feb 12, 2026
Forecast Valid:
1am CST Feb 12, 2026-6pm CST Feb 18, 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