Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Current conditions at

Danville, Vermilion County Airport (KDNV)

Lat: 40.2°NLon: 87.6°WElev: 696ft.

Overcast

76°F

24°C

Humidity 97%
Wind Speed SE 7 mph
Barometer 29.99 in
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index75°F (24°C)
Last update 29 Jun 4:35 am CDT
Extended Forecast for

Potomac IL

Heat Advisory June 29, 11:00am until July 3, 12:00am
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Partly sunny, with a high near 92. Heat index values as high as 106. South wind 7 to 13 mph, with gusts as high as 20 mph.

    High: 92 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 75. South wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 94. Heat index values as high as 107. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.

    High: 94 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 73. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Southwest wind 5 to 11 mph, with gusts as high as 17 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 74. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.

    Low: 74 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 95. South southwest wind 5 to 10 mph, with gusts as high as 17 mph.

    High: 95 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 91.

    High: 91 °F

    Chance
    T-storms

Detailed Forecast

Today
Partly sunny, with a high near 92. Heat index values as high as 106. South wind 7 to 13 mph, with gusts as high as 20 mph.
Tonight
Partly cloudy, with a low around 75. South wind 7 to 10 mph, with gusts as high as 18 mph.
Tuesday
Mostly sunny, with a high near 94. Heat index values as high as 107. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
Clear, with a low around 73. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 94. Southwest wind 5 to 11 mph, with gusts as high as 17 mph.
Wednesday Night
Clear, with a low around 74. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Thursday
Sunny and hot, with a high near 95. South southwest wind 5 to 10 mph, with gusts as high as 17 mph.
Thursday Night
Mostly clear, with a low around 74.
Friday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Friday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Potomac IL
 40.3°N 87.79°W (Elev. 673 ft)
2:46 am CDT Jun 29, 2026
5am CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database