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

53°F

12°C

Humidity 89%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 11 Oct 12:35 am CDT
Extended Forecast for

2 Miles SW Alton IL

  • Overnight

    Overnight: Partly cloudy, with a low around 52. Calm wind.

    Low: 52 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 90. Calm wind becoming southwest around 5 mph.

    High: 90 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65. Southeast wind around 6 mph becoming southwest after midnight.

    Low: 65 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 95. Southwest wind 6 to 13 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 70. Southwest wind 8 to 10 mph.

    Low: 70 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly clear, with a low around 68. Chance of precipitation is 50%.

    Low: 68 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 85. Chance of precipitation is 80%.

    High: 85 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 52. Calm wind.
Sunday
Sunny, with a high near 90. Calm wind becoming southwest around 5 mph.
Sunday Night
Partly cloudy, with a low around 65. Southeast wind around 6 mph becoming southwest after midnight.
Columbus Day
Sunny, with a high near 95. Southwest wind 6 to 13 mph.
Monday Night
Clear, with a low around 70. Southwest wind 8 to 10 mph.
Tuesday
Sunny, with a high near 93.
Tuesday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly clear, with a low around 68. Chance of precipitation is 50%.
Wednesday
Showers and possibly a thunderstorm. High near 85. Chance of precipitation is 80%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Thursday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
10:26 pm CDT Oct 10, 2026
Forecast Valid:
1am CDT Oct 11, 2026-6pm CDT Oct 17, 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