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.

Light Rain

46°F

8°C

Humidity 93%
Wind Speed NE 9 mph
Barometer 29.93 in
Dewpoint 45°F (7°C)
Visibility 5.00 mi
Wind Chill41°F (5°C)
Last update 14 Feb 5:50 pm CST
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: Rain, mainly before 3am. Low around 44. East wind around 8 mph. Chance of precipitation is 100%.

    Low: 44 °F

    Rain

  • Sunday

    Sunday: A 20 percent chance of rain before 7am. Cloudy through mid morning, then gradual clearing, with a high near 59. Northeast wind 5 to 10 mph.

    High: 59 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38. Light and variable wind.

    Low: 38 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 63. Light south wind increasing to 6 to 11 mph in the morning.

    High: 63 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44. South wind 6 to 8 mph.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 67.

    High: 67 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
Rain, mainly before 3am. Low around 44. East wind around 8 mph. Chance of precipitation is 100%.
Sunday
A 20 percent chance of rain before 7am. Cloudy through mid morning, then gradual clearing, with a high near 59. Northeast wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 38. Light and variable wind.
Washington's Birthday
Mostly sunny, with a high near 63. Light south wind increasing to 6 to 11 mph in the morning.
Monday Night
Mostly cloudy, with a low around 44. South wind 6 to 8 mph.
Tuesday
Mostly cloudy, with a high near 67.
Tuesday Night
Mostly cloudy, with a low around 59.
Wednesday
Sunny, with a high near 71.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
A 30 percent chance of rain, mainly after noon. Mostly sunny, with a high near 69.
Thursday Night
A 20 percent chance of rain. Partly cloudy, with a low around 39.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 53.
Friday Night
A 20 percent chance of snow. Partly cloudy, with a low around 31.
Saturday
Mostly sunny, with a high near 50.
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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:
4:46 pm CST Feb 14, 2026
Forecast Valid:
6pm CST Feb 14, 2026-6pm CST Feb 21, 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