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

73°F

23°C

Humidity 57%
Wind Speed NW 10 mph
Barometer 29.68 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 15 Nov 5:15 pm CST
Extended Forecast for

Vandalia IL

  • Tonight

    Tonight: Clear, with a low around 40. North wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: 40 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 56. Northwest wind 5 to 9 mph.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 30. Light northwest wind.

    Low: 30 °F

    Clear

  • Monday

    Monday: A 20 percent chance of showers after 3pm. Increasing clouds, with a high near 57. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 57 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 44. Southeast wind 6 to 8 mph. Chance of precipitation is 70%.

    Low: 44 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 66. Chance of precipitation is 30%.

    High: 66 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 61.

    High: 61 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain

Detailed Forecast

Tonight
Clear, with a low around 40. North wind 7 to 9 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 56. Northwest wind 5 to 9 mph.
Sunday Night
Clear, with a low around 30. Light northwest wind.
Monday
A 20 percent chance of showers after 3pm. Increasing clouds, with a high near 57. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Monday Night
Showers likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 44. Southeast wind 6 to 8 mph. Chance of precipitation is 70%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 66. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 43.
Wednesday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 61.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 47.
Thursday
Rain. High near 63. Chance of precipitation is 80%.
Thursday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.
Friday
Rain likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 41.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 54.
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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:
4:46 pm CST Nov 15, 2025
Forecast Valid:
5pm CST Nov 15, 2025-6pm CST Nov 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