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.

Overcast

43°F

6°C

Humidity 81%
Wind Speed W 6 mph
Barometer 30.08 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 7 Mar 10:50 pm CDT
Extended Forecast for

Aviston IL

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 64. Light west wind becoming southwest 5 to 10 mph in the morning.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 43. South wind 6 to 8 mph.

    Low: 43 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 74. South wind 7 to 16 mph, with gusts as high as 23 mph.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. South wind 8 to 13 mph, with gusts as high as 21 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Chance of precipitation is 50%.

    High: 78 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 57. Breezy. Chance of precipitation is 90%.

    Low: 57 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before noon, then showers likely. High near 67. Breezy. Chance of precipitation is 100%.

    High: 67 °F

    Breezy.
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before midnight. Partly cloudy, with a low around 32.

    Low: 32 °F

    Chance
    Showers then
    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 37. Northwest wind 5 to 7 mph becoming calm after midnight.
Sunday
Sunny, with a high near 64. Light west wind becoming southwest 5 to 10 mph in the morning.
Sunday Night
Clear, with a low around 43. South wind 6 to 8 mph.
Monday
Sunny, with a high near 74. South wind 7 to 16 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 60. South wind 8 to 13 mph, with gusts as high as 21 mph.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Chance of precipitation is 50%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 57. Breezy. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm before noon, then showers likely. High near 67. Breezy. Chance of precipitation is 100%.
Wednesday Night
A 30 percent chance of showers before midnight. Partly cloudy, with a low around 32.
Thursday
Sunny, with a high near 51.
Thursday Night
Mostly cloudy, with a low around 41.
Friday
Partly sunny, with a high near 65. Breezy.
Friday Night
Mostly cloudy, with a low around 39.
Saturday
Mostly cloudy, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Aviston IL
 38.62°N 89.61°W (Elev. 482 ft)
Last Update:
9:21 pm CST Mar 7, 2026
Forecast Valid:
10pm CST Mar 7, 2026-6pm CDT Mar 14, 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