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.

Partly Cloudy

95°F

35°C

Humidity 69%
Wind Speed NA
Barometer 29.89 in
Dewpoint 83°F (28°C)
Visibility 10.00 mi
Heat Index122°F (50°C)
Last update 26 Jul 3:55 pm CDT
Extended Forecast for

Vandalia IL

Extreme Heat Warning July 26, 04:31pm until July 27, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 26, 04:31pm until July 27, 09:00pm

    NOW until 9:00pm Mon

    Extreme Heat Warning

  • This Afternoon

    High: 92 °F

    Scattered
    T-storms

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 8pm. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 75. Calm wind. Chance of precipitation is 30%.

    Low: 75 °F

    Scattered
    T-storms then
    Patchy Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, sunny, with a high near 94. Heat index values as high as 112. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 94 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 76. South wind around 6 mph becoming west after midnight.

    Low: 76 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 89. North wind 6 to 9 mph.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

Detailed Forecast

This Afternoon
Scattered showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 115. West wind around 5 mph. Chance of precipitation is 30%.
Tonight
Scattered showers and thunderstorms, mainly before 8pm. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 75. Calm wind. Chance of precipitation is 30%.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 94. Heat index values as high as 112. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 76. South wind around 6 mph becoming west after midnight.
Tuesday
Sunny, with a high near 89. North wind 6 to 9 mph.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Clear, with a low around 65.
Thursday
Sunny, with a high near 86.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 67.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vandalia IL
 38.98°N 89.1°W (Elev. 499 ft)
Last Update:
2:26 pm CDT Jul 26, 2026
Forecast Valid:
4pm CDT Jul 26, 2026-6pm CDT Aug 2, 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