National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

Salem, Salem-Leckrone Airport (KSLO)

Lat: 38.64°NLon: 88.96°WElev: 574ft.

Overcast

72°F

22°C

Humidity 88%
Wind Speed NA
Barometer 29.79 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 2 Aug 9:35 am CDT
Extended Forecast for

4 Miles N Vandalia IL

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 79. North wind 10 to 15 mph, with gusts as high as 22 mph.

    High: 79 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 63. North wind 5 to 9 mph becoming light after midnight.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 82. Northeast wind 3 to 5 mph.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 62. Calm wind.

    Low: 62 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. Calm wind.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 83.

    High: 83 °F

    Chance
    Showers

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 79. North wind 10 to 15 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 63. North wind 5 to 9 mph becoming light after midnight.
Monday
Sunny, with a high near 82. Northeast wind 3 to 5 mph.
Monday Night
Clear, with a low around 62. Calm wind.
Tuesday
Sunny, with a high near 84. Calm wind.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 86.
Wednesday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67.
Thursday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 83.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Vandalia IL
 39.05°N 89.1°W (Elev. 650 ft)
Last Update:
9:41 am CDT Aug 2, 2026
Forecast Valid:
9am CDT Aug 2, 2026-6pm CDT Aug 8, 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