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.

Overcast

68°F

20°C

Humidity 98%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 67°F (19°C)
Visibility 7.00 mi
Last update 24 Sep 5:35 am CDT
Extended Forecast for

Vandalia IL

  • Overnight

    Overnight: A 40 percent chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 65. Northeast wind around 5 mph.

    Low: 65 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 4pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 78. North wind 6 to 8 mph. Chance of precipitation is 40%.

    High: 78 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Cloudy, then gradual clearing toward daybreak, with a low around 57. North wind around 7 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly cloudy during the morning, then sunny during the afternoon, with a high near 77. North wind 6 to 9 mph, with gusts as high as 20 mph.

    High: 77 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. Northwest wind around 5 mph becoming calm in the evening.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 54.

    Low: 54 °F

    Clear

Detailed Forecast

Overnight
A 40 percent chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 65. Northeast wind around 5 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 4pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 78. North wind 6 to 8 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Cloudy, then gradual clearing toward daybreak, with a low around 57. North wind around 7 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Thursday
Mostly cloudy during the morning, then sunny during the afternoon, with a high near 77. North wind 6 to 9 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 51. Northwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 81.
Friday Night
Clear, with a low around 52.
Saturday
Sunny, with a high near 83.
Saturday Night
Clear, with a low around 54.
Sunday
Sunny, with a high near 85.
Sunday Night
Mostly clear, with a low around 56.
Monday
Sunny, with a high near 86.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vandalia IL
 38.98°N 89.1°W (Elev. 499 ft)
Last Update:
4:16 am CDT Sep 24, 2025
Forecast Valid:
5am CDT Sep 24, 2025-6pm CDT Sep 30, 2025
 
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