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.

Fog/Mist

37°F

3°C

Humidity 98%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 37°F (3°C)
Visibility 2.00 mi
Last update 16 Feb 3:55 am CST
Extended Forecast for

Vandalia IL

  • Washington's Birthday

    Washington's Birthday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 61. Light southwest wind becoming south 5 to 10 mph in the morning.

    High: 61 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 41. South wind around 6 mph.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 60 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 55. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 31 mph.

    Low: 55 °F

    Breezy.
    Cloudy then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 70. Southwest wind 9 to 18 mph, with gusts as high as 28 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69. Chance of precipitation is 50%.

    High: 69 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 37.

    Low: 37 °F

    Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

Washington's Birthday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 61. Light southwest wind becoming south 5 to 10 mph in the morning.
Tonight
Partly cloudy, with a low around 41. South wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 60. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
A 20 percent chance of showers after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 55. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 31 mph.
Wednesday
Sunny, with a high near 70. Southwest wind 9 to 18 mph, with gusts as high as 28 mph.
Wednesday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 45.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69. Chance of precipitation is 50%.
Thursday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 37.
Friday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 50.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 30.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 46.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 27.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 39.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vandalia IL
 38.96°N 89.11°W (Elev. 531 ft)
Last Update:
3:36 am CST Feb 16, 2026
Forecast Valid:
4am CST Feb 16, 2026-6pm CST Feb 22, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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