National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Salem, Salem-Leckrone Airport (KSLO)

Lat: 38.64°NLon: 88.96°WElev: 574ft.

Rain

49°F

9°C

Humidity 82%
Wind Speed Calm
Barometer 29.89 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 18 Apr 8:35 am CDT
Extended Forecast for

Vandalia IL

  • Today

    Today: A 30 percent chance of showers, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 55. Northwest wind 15 to 17 mph, with gusts as high as 24 mph.

    High: 55 °F

    Chance
    Showers then
    Mostly Sunny

  • Tonight

    Tonight: Clear, with a low around 37. Northwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Areas of frost before 7am. Otherwise, sunny, with a high near 64. Light west wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 22 mph.

    High: 64 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. Northwest wind 5 to 8 mph becoming light and variable after midnight.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 62. Calm wind becoming east around 5 mph in the morning.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 56.

    Low: 56 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

Today
A 30 percent chance of showers, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 55. Northwest wind 15 to 17 mph, with gusts as high as 24 mph.
Tonight
Clear, with a low around 37. Northwest wind 5 to 10 mph becoming light and variable after midnight.
Sunday
Areas of frost before 7am. Otherwise, sunny, with a high near 64. Light west wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly clear, with a low around 37. Northwest wind 5 to 8 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 62. Calm wind becoming east around 5 mph in the morning.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 76. Chance of precipitation is 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:
5:41 am CDT Apr 18, 2026
Forecast Valid:
8am CDT Apr 18, 2026-6pm CDT Apr 24, 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