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

Salem, Salem-Leckrone Airport (KSLO)

Lat: 38.64°NLon: 88.96°WElev: 574ft.

Fog/Mist

70°F

21°C

Humidity 100%
Wind Speed NA
Barometer 30.04 in
Dewpoint 70°F (21°C)
Visibility 4.00 mi
Last update 15 Oct 6:35 am CDT
Extended Forecast for

Vandalia IL

  • Today

    Today: Showers and thunderstorms likely, mainly before 1pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 79. Light and variable wind becoming south 5 to 10 mph in the morning. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then scattered showers between 1am and 4am. Increasing clouds, with a low around 46. Southwest wind 9 to 15 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 70%.

    Low: 46 °F

    Showers
    Likely

  • Friday

    Friday: Cloudy through mid morning, then becoming mostly sunny, with a high near 57. Northwest wind 16 to 18 mph, with gusts as high as 26 mph.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. North wind 9 to 14 mph, with gusts as high as 21 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 60. North wind around 6 mph becoming calm in the afternoon.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 35.

    Low: 35 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and thunderstorms likely, mainly before 1pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 79. Light and variable wind becoming south 5 to 10 mph in the morning. Chance of precipitation is 70%.
Tonight
Showers and thunderstorms likely before 1am, then scattered showers between 1am and 4am. Increasing clouds, with a low around 46. Southwest wind 9 to 15 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 70%.
Friday
Cloudy through mid morning, then becoming mostly sunny, with a high near 57. Northwest wind 16 to 18 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 37. North wind 9 to 14 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 60. North wind around 6 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 35.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 37.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vandalia IL
 38.98°N 89.1°W (Elev. 499 ft)
Last Update:
5:11 am CDT Oct 15, 2026
Forecast Valid:
6am CDT Oct 15, 2026-6pm CDT Oct 21, 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