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.

Thunderstorm Heavy Rain in Vicinity

60°F

16°C

Humidity 98%
Wind Speed SW 7 mph
Barometer 29.97 in
Dewpoint 60°F (16°C)
Visibility 7.00 mi
Last update 5 Mar 1:35 am CST
Extended Forecast for

Vandalia IL

Dense Fog Advisory until March 5, 06:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until March 5, 06:00am

    NOW until 6:00am Thu

    Dense Fog Advisory

  • Overnight

    Low: 55 °F

    Showers and
    Areas Dense
    Fog

  • Thursday

    Thursday: Showers and thunderstorms before 10am, then a slight chance of showers between 10am and noon. Patchy fog before 1pm. High near 66. West wind 5 to 9 mph becoming light and variable in the afternoon. Chance of precipitation is 80%.

    High: 66 °F

    Showers and
    Patchy Fog
    then Patchy
    Fog

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 55. Calm wind becoming south 5 to 8 mph after midnight.

    Low: 55 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of rain and thunderstorms. Partly sunny, with a high near 76. Breezy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 30%.

    High: 76 °F

    Chance Rain
    and Breezy

  • Friday Night

    Friday Night: A slight chance of rain before 9pm, then a slight chance of rain and thunderstorms between 9pm and midnight, then rain and possibly a thunderstorm after midnight. Low around 59. South wind 13 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    Low: 59 °F

    Slight Chance
    T-storms then
    Rain

  • Saturday

    Saturday: Rain likely, mainly before noon. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.

    High: 67 °F

    Rain Likely
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Areas of dense fog. Low around 55. South wind 5 to 7 mph. Chance of precipitation is 90%.
Thursday
Showers and thunderstorms before 10am, then a slight chance of showers between 10am and noon. Patchy fog before 1pm. High near 66. West wind 5 to 9 mph becoming light and variable in the afternoon. Chance of precipitation is 80%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 55. Calm wind becoming south 5 to 8 mph after midnight.
Friday
A chance of rain and thunderstorms. Partly sunny, with a high near 76. Breezy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 30%.
Friday Night
A slight chance of rain before 9pm, then a slight chance of rain and thunderstorms between 9pm and midnight, then rain and possibly a thunderstorm after midnight. Low around 59. South wind 13 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Saturday
Rain likely, mainly before noon. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Sunny, with a high near 61.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 72.
Monday Night
A 30 percent chance of rain and thunderstorms. Mostly clear, with a low around 57.
Tuesday
Rain and possibly a thunderstorm. High near 73. Chance of precipitation is 80%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 52. Chance of precipitation is 90%.
Wednesday
Rain. High near 60. Chance of precipitation is 80%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vandalia IL
 38.96°N 89.11°W (Elev. 531 ft)
Last Update:
12:26 am CST Mar 5, 2026
Forecast Valid:
1am CST Mar 5, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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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