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.

Overcast

64°F

18°C

Humidity 57%
Wind Speed SW 9 mph
Barometer 30.06 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 22 Apr 4:35 am CDT
Extended Forecast for

Vandalia IL

  • Today

    Today: Mostly sunny, with a high near 77. Southwest wind 7 to 10 mph.

    High: 77 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. South wind around 6 mph.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 78. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 62. South wind 11 to 13 mph, with gusts as high as 21 mph.

    Low: 62 °F

    Partly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 73. South wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.

    High: 73 °F

    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 77. Southwest wind 7 to 10 mph.
Tonight
Mostly clear, with a low around 55. South wind around 6 mph.
Thursday
Sunny, with a high near 78. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 62. South wind 11 to 13 mph, with gusts as high as 21 mph.
Friday
Showers and possibly a thunderstorm. High near 73. South wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Friday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 50.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Monday
Showers and possibly a thunderstorm. High near 75. Breezy. Chance of precipitation is 80%.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 67.
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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:
4:11 am CDT Apr 22, 2026
Forecast Valid:
5am CDT Apr 22, 2026-6pm CDT Apr 28, 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