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.

Fog/Mist

48°F

9°C

Humidity 98%
Wind Speed NE 5 mph
Barometer 30.25 in
Dewpoint 47°F (8°C)
Visibility 4.00 mi
Wind Chill46°F (8°C)
Last update 24 Dec 3:35 am CST
Extended Forecast for

Vandalia IL

Dense Fog Advisory December 24, 03:52am until December 24, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory December 24, 03:52am until December 24, 09:00am

    NOW until 9:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 41 °F

    Dense Fog

  • Wednesday

    Wednesday: Patchy drizzle after 11am. Areas of dense fog before 9am. Otherwise, cloudy, with a high near 58. East wind 5 to 7 mph becoming southeast in the afternoon.

    High: 58 °F

    Patchy
    Drizzle and
    Areas Dense
    Fog

  • Wednesday Night

    Wednesday Night: Patchy drizzle before 7pm. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 52. South wind 5 to 7 mph becoming calm after midnight.

    Low: 52 °F

    Patchy
    Drizzle and
    Patchy Fog
    then Patchy
    Fog

  • Christmas Day

    Christmas Day: A slight chance of drizzle between noon and 1pm, then a slight chance of rain after 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 61. Calm wind becoming east around 5 mph. Chance of precipitation is 20%.

    High: 61 °F

    Patchy Fog
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 54. Light and variable wind becoming south 5 to 8 mph in the evening.

    Low: 54 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Widespread dense fog, mainly before 5am. Otherwise, mostly cloudy, with a low around 41. Northeast wind 3 to 5 mph.
Wednesday
Patchy drizzle after 11am. Areas of dense fog before 9am. Otherwise, cloudy, with a high near 58. East wind 5 to 7 mph becoming southeast in the afternoon.
Wednesday Night
Patchy drizzle before 7pm. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 52. South wind 5 to 7 mph becoming calm after midnight.
Christmas Day
A slight chance of drizzle between noon and 1pm, then a slight chance of rain after 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 61. Calm wind becoming east around 5 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 54. Light and variable wind becoming south 5 to 8 mph in the evening.
Friday
Mostly sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 45.
Saturday
Mostly cloudy, with a high near 65.
Saturday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 45.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 51.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Sunny, with a high near 24.
Monday Night
Partly cloudy, with a low around 14.
Tuesday
Partly sunny, with a high near 30.
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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:
3:16 am CST Dec 24, 2025
Forecast Valid:
3am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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