National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Rain

56°F

13°C

Humidity 89%
Wind Speed NW 16 G 28 mph
Barometer 29.82 in
Dewpoint 53°F (12°C)
Visibility 7.00 mi
Last update 18 Apr 3:55 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Overnight

    Overnight: Showers likely, mainly before 5am. Cloudy, with a low around 48. West wind around 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    Low: 48 °F

    Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 58. Northwest wind around 17 mph, with gusts as high as 25 mph.

    High: 58 °F

    Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 41. Northwest wind 8 to 13 mph becoming light west after midnight.

    Low: 41 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67. Light west wind increasing to 11 to 16 mph in the morning. Winds could gust as high as 25 mph.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40. Northwest wind 5 to 9 mph becoming light and variable after midnight.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Showers likely, mainly before 5am. Cloudy, with a low around 48. West wind around 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Saturday
A 30 percent chance of showers, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 58. Northwest wind around 17 mph, with gusts as high as 25 mph.
Saturday Night
Clear, with a low around 41. Northwest wind 8 to 13 mph becoming light west after midnight.
Sunday
Sunny, with a high near 67. Light west wind increasing to 11 to 16 mph in the morning. Winds could gust as high as 25 mph.
Sunday Night
Mostly clear, with a low around 40. Northwest wind 5 to 9 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 57.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.
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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:
2:26 am CDT Apr 18, 2026
Forecast Valid:
4am CDT Apr 18, 2026-6pm CDT Apr 24, 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