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

90°F

32°C

Humidity 81%
Wind Speed NA
Barometer 29.95 in
Dewpoint 84°F (29°C)
Visibility 10.00 mi
Heat Index114°F (46°C)
Last update 26 Jul 12:35 pm CDT
Extended Forecast for

Vandalia IL

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

    NOW until 9:00pm Mon

    Extreme Heat Warning

  • This Afternoon

    High: 92 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Chance
    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 90. Northwest wind 5 to 9 mph.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 92. Heat index values as high as 113. Light and variable wind becoming southwest around 5 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 75. Calm wind.
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 90. Northwest wind 5 to 9 mph.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Clear, with a low around 63.
Thursday
Sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 66.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly 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:
11:21 am CDT Jul 26, 2026
Forecast Valid:
12pm CDT Jul 26, 2026-6pm CDT Aug 1, 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