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

45°F

7°C

Humidity 93%
Wind Speed E 7 mph
Barometer 29.89 in
Dewpoint 43°F (6°C)
Visibility 7.00 mi
Wind Chill41°F (5°C)
Last update 15 Feb 12:55 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Overnight

    Overnight: Rain, mainly before 3am. Patchy fog before 3am. Low around 44. East wind 6 to 9 mph. Chance of precipitation is 80%.

    Low: 44 °F

    Rain and
    Patchy Fog

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 57. North wind 5 to 10 mph.

    High: 57 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. Calm wind.

    Low: 34 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 61. Light south wind increasing to 6 to 11 mph in the morning.

    High: 61 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. South wind 6 to 8 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 63.

    High: 63 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Overnight
Rain, mainly before 3am. Patchy fog before 3am. Low around 44. East wind 6 to 9 mph. Chance of precipitation is 80%.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 57. North wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 34. Calm wind.
Washington's Birthday
Mostly sunny, with a high near 61. Light south wind increasing to 6 to 11 mph in the morning.
Monday Night
Mostly cloudy, with a low around 42. South wind 6 to 8 mph.
Tuesday
Mostly cloudy, with a high near 63.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
Partly sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
A 30 percent chance of rain, mainly after noon. Sunny, with a high near 71.
Thursday Night
A 20 percent chance of rain. Partly cloudy, with a low around 38.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 52.
Friday Night
Partly cloudy, with a low around 30.
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:
12:51 am CST Feb 15, 2026
Forecast Valid:
1am CST Feb 15, 2026-6pm CST Feb 21, 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