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

65°F

18°C

Humidity 40%
Wind Speed S 5 mph
Barometer 30.23 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 20 Apr 6:15 pm CDT
Extended Forecast for

Vandalia IL

  • Tonight

    Tonight: Mostly clear, with a low around 48. Southeast wind 5 to 7 mph.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76. Southwest wind 7 to 16 mph, with gusts as high as 23 mph.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Mostly clear, with a low around 55. Southwest wind 8 to 10 mph.

    Low: 55 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 74. Southwest wind 6 to 8 mph.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56. South wind around 6 mph.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 90%.

    High: 74 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 48. Southeast wind 5 to 7 mph.
Tuesday
Sunny, with a high near 76. Southwest wind 7 to 16 mph, with gusts as high as 23 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 55. Southwest wind 8 to 10 mph.
Wednesday
Sunny, with a high near 74. Southwest wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 56. South wind around 6 mph.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61.
Friday
Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 90%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Saturday
A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 72.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 70.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 53.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vandalia IL
 38.96°N 89.11°W (Elev. 531 ft)
Last Update:
5:51 pm CDT Apr 20, 2026
Forecast Valid:
6pm CDT Apr 20, 2026-6pm CDT Apr 27, 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