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 92%
Wind Speed S 13 mph
Barometer 29.90 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 10 Mar 2:55 am CDT
Extended Forecast for

Vandalia IL

  • Overnight

    Overnight: Partly cloudy, with a low around 61. South wind around 9 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 78. South wind 8 to 15 mph, with gusts as high as 28 mph.

    High: 78 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, mainly after 4am. Mostly cloudy, with a low around 57. Southwest wind 14 to 18 mph, with gusts as high as 37 mph. Chance of precipitation is 70%.

    Low: 57 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then showers likely between 1pm and 2pm, then rain likely after 2pm. Temperature falling to around 48 by 5pm. Breezy, with a southwest wind 15 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.

    High: 67 °F⇓

    Breezy.
    T-storms then
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32. Northwest wind 7 to 17 mph, with gusts as high as 26 mph.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 42. Breezy.

    Low: 42 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Friday

    Friday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 61. South wind around 9 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 78. South wind 8 to 15 mph, with gusts as high as 28 mph.
Tuesday Night
Showers and thunderstorms likely, mainly after 4am. Mostly cloudy, with a low around 57. Southwest wind 14 to 18 mph, with gusts as high as 37 mph. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm before 1pm, then showers likely between 1pm and 2pm, then rain likely after 2pm. Temperature falling to around 48 by 5pm. Breezy, with a southwest wind 15 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 32. Northwest wind 7 to 17 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 52.
Thursday Night
Mostly cloudy, with a low around 42. Breezy.
Friday
Mostly cloudy, with a high near 60.
Friday Night
Mostly cloudy, with a low around 37.
Saturday
Partly sunny, with a high near 64.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 49.
Sunday
Rain. High near 59. Breezy. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 22. Blustery. Chance of precipitation is 40%.
Monday
A 20 percent chance of snow. Partly sunny, with a high near 35.
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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:
1:25 am CDT Mar 10, 2026
Forecast Valid:
3am CDT Mar 10, 2026-6pm CDT Mar 16, 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