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

69°F

21°C

Humidity 35%
Wind Speed W 6 mph
Barometer 29.66 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 18 Feb 4:55 pm CST
Extended Forecast for

Vandalia IL

  • Tonight

    Tonight: Increasing clouds, with a low around 51. Calm wind becoming south around 6 mph after midnight.

    Low: 51 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Rain and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 66. South wind 6 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    High: 66 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 37. Southwest wind 10 to 17 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 48. West wind 8 to 18 mph, with gusts as high as 26 mph.

    High: 48 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28. Northwest wind around 6 mph.

    Low: 28 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of rain and snow after noon. Mostly sunny, with a high near 43. Chance of precipitation is 20%.

    High: 43 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 19.

    Low: 19 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 51. Calm wind becoming south around 6 mph after midnight.
Thursday
Rain and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 66. South wind 6 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 37. Southwest wind 10 to 17 mph, with gusts as high as 25 mph.
Friday
Sunny, with a high near 48. West wind 8 to 18 mph, with gusts as high as 26 mph.
Friday Night
Partly cloudy, with a low around 28. Northwest wind around 6 mph.
Saturday
A slight chance of rain and snow after noon. Mostly sunny, with a high near 43. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 23.
Sunday
Mostly sunny, with a high near 36.
Sunday Night
Mostly clear, with a low around 19.
Monday
Sunny, with a high near 36.
Monday Night
Mostly clear, with a low around 19.
Tuesday
Partly sunny, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vandalia IL
 38.96°N 89.11°W (Elev. 531 ft)
Last Update:
2:41 pm CST Feb 18, 2026
Forecast Valid:
5pm CST Feb 18, 2026-6pm CST Feb 25, 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