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

39°F

4°C

Humidity 90%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 10 Jan 2:15 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Overnight

    Overnight: A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 38. Light north wind.

    Low: 38 °F

    Chance Rain

  • Saturday

    Saturday: A 40 percent chance of rain, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 47. Northwest wind 6 to 16 mph, with gusts as high as 25 mph.

    High: 47 °F

    Chance Rain
    then Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 27. West wind 10 to 15 mph, with gusts as high as 26 mph.

    Low: 27 °F

    Gradual
    Clearing

  • Sunday

    Sunday: Sunny, with a high near 39. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.

    High: 39 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 27. Southwest wind 3 to 6 mph.

    Low: 27 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 38. Light north wind.
Saturday
A 40 percent chance of rain, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 47. Northwest wind 6 to 16 mph, with gusts as high as 25 mph.
Saturday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 27. West wind 10 to 15 mph, with gusts as high as 26 mph.
Sunday
Sunny, with a high near 39. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 27. Southwest wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 44.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 38.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 44.
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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:
1:06 am CST Jan 10, 2026
Forecast Valid:
2am CST Jan 10, 2026-6pm CST Jan 16, 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