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

11°F

-12°C

Humidity 71%
Wind Speed Calm
Barometer 30.43 in
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Last update 20 Jan 12:35 am CST
Extended Forecast for

Vandalia IL

  • Overnight

    Overnight: Mostly clear, with a low around 10. Light southwest wind.

    Low: 10 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 33. Light southwest wind becoming south 8 to 13 mph in the morning.

    High: 33 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a temperature rising to around 35 by 5am. South wind 9 to 16 mph, with gusts as high as 29 mph.

    Low: 30 °F⇑

    Increasing
    Clouds

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 42. West wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 42 °F

    Gradual
    Clearing

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 22. Southwest wind 6 to 8 mph becoming northwest after midnight.

    Low: 22 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 15.

    High: 15 °F

    Cold

  • Friday Night

    Friday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 0.

    Low: 0 °F

    Slight Chance
    Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 10. Light southwest wind.
Tuesday
Mostly sunny, with a high near 33. Light southwest wind becoming south 8 to 13 mph in the morning.
Tuesday Night
Increasing clouds, with a temperature rising to around 35 by 5am. South wind 9 to 16 mph, with gusts as high as 29 mph.
Wednesday
Cloudy through mid morning, then gradual clearing, with a high near 42. West wind 7 to 15 mph, with gusts as high as 24 mph.
Wednesday Night
Mostly clear, with a low around 22. Southwest wind 6 to 8 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
Mostly cloudy, with a low around 10.
Friday
Mostly cloudy and cold, with a high near 15.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 0.
Saturday
A 30 percent chance of snow, mainly after noon. Mostly cloudy and cold, with a high near 12.
Saturday Night
A 30 percent chance of snow. Partly cloudy, with a low around 3.
Sunday
A 20 percent chance of snow. Mostly sunny and cold, with a high near 20.
Sunday Night
Mostly clear, with a low around 8.
Monday
Sunny, with a high near 30.
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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:
10:51 pm CST Jan 19, 2026
Forecast Valid:
12am CST Jan 20, 2026-6pm CST Jan 26, 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