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.

Fair

19°C

67°F

Humidity 98%
Wind Speed Calm
Barometer 30.28 in
Dewpoint 19°C (67°F)
Visibility 11 km
Last update 20 Jun 5:55 am CDT
Extended Forecast for

Alton IL

  • Today

    Today: Mostly sunny, with a high near 34. Light south wind increasing to 6 to 11 km/h in the morning.

    High: 34 °C

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 23. Southeast wind 6 to 11 km/h becoming light south after midnight.

    Low: 23 °C

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 34. Light southwest wind increasing to 6 to 11 km/h in the morning.

    High: 34 °C

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 24. South wind 5 to 10 km/h becoming calm after midnight.

    Low: 24 °C

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 37. Southwest wind 5 to 10 km/h increasing to 11 to 16 km/h in the afternoon.

    High: 37 °C

    Hot

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 25.

    Low: 25 °C

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 34.

    High: 34 °C

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 22.

    Low: 22 °C

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 35.

    High: 35 °C

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 34. Light south wind increasing to 6 to 11 km/h in the morning.
Tonight
Mostly clear, with a low around 23. Southeast wind 6 to 11 km/h becoming light south after midnight.
Friday
Sunny, with a high near 34. Light southwest wind increasing to 6 to 11 km/h in the morning.
Friday Night
Mostly clear, with a low around 24. South wind 5 to 10 km/h becoming calm after midnight.
Saturday
Mostly sunny and hot, with a high near 37. Southwest wind 5 to 10 km/h increasing to 11 to 16 km/h in the afternoon.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 25.
Sunday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 34.
Sunday Night
Mostly clear, with a low around 22.
Monday
Sunny, with a high near 35.
Monday Night
Mostly clear, with a low around 23.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 38.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 25.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 35.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Alton IL
 38.91°N 90.16°W (Elev. 505 m)
Last Update:
3:52 am CDT Jun 20, 2024
Forecast Valid:
6am CDT Jun 20, 2024-6pm CDT Jun 26, 2024
 
Forecast Discussion
 
Get as KML Get as XML

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