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.

Fair

31°F

-1°C

Humidity 47%
Wind Speed SW 7 mph
Barometer 30.14 in
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 15 Dec 9:35 pm CST
Extended Forecast for

Vandalia IL

  • Tonight

    Tonight: Mostly clear, with a low around 20. South wind around 7 mph.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 41. South wind 7 to 11 mph.

    High: 41 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31. Southwest wind 3 to 8 mph.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 48. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 48 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight. Mostly cloudy, with a temperature falling to near 37 by 8pm, then rising to around 48 during the remainder of the night. South wind 6 to 15 mph, with gusts as high as 24 mph.

    Low: 37 °F⇑

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. Temperature rising to near 53 by 9am, then falling to around 42 during the remainder of the day. Chance of precipitation is 90%.

    High: 53 °F⇓

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 20. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 41. South wind 7 to 11 mph.
Tuesday Night
Mostly cloudy, with a low around 31. Southwest wind 3 to 8 mph.
Wednesday
Sunny, with a high near 48. Calm wind becoming southeast around 6 mph in the afternoon.
Wednesday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a temperature falling to near 37 by 8pm, then rising to around 48 during the remainder of the night. South wind 6 to 15 mph, with gusts as high as 24 mph.
Thursday
Showers and possibly a thunderstorm. Temperature rising to near 53 by 9am, then falling to around 42 during the remainder of the day. Chance of precipitation is 90%.
Thursday Night
Partly cloudy, with a low around 18.
Friday
Mostly sunny, with a high near 34.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Partly sunny, with a high near 51.
Saturday Night
Mostly cloudy, with a low around 30.
Sunday
Mostly sunny, with a high near 45.
Sunday Night
Mostly cloudy, with a low around 33.
Monday
Partly sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vandalia IL
 38.98°N 89.1°W (Elev. 499 ft)
Last Update:
8:56 pm CST Dec 15, 2025
Forecast Valid:
9pm CST Dec 15, 2025-6pm CST Dec 22, 2025
 
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