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

53°F

12°C

Humidity 83%
Wind Speed Calm
Barometer 30.33 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 11 Apr 12:15 am CDT
Extended Forecast for

Vandalia IL

  • Overnight

    Overnight: Partly cloudy, with a low around 49. East wind around 6 mph.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 69. East wind around 7 mph.

    High: 69 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58. Southeast wind 6 to 8 mph.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 79. Breezy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 79 °F

    Mostly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Southwest wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.

    High: 81 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66.

    Low: 66 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 83.

    High: 83 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 49. East wind around 6 mph.
Saturday
A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 69. East wind around 7 mph.
Saturday Night
Partly cloudy, with a low around 58. Southeast wind 6 to 8 mph.
Sunday
Partly sunny, with a high near 79. Breezy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 28 mph.
Sunday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Southwest wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 83.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 77.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
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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:
10:26 pm CDT Apr 10, 2026
Forecast Valid:
12am CDT Apr 11, 2026-6pm CDT Apr 17, 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