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

Danville, Vermilion County Airport (KDNV)

Lat: 40.2°NLon: 87.6°WElev: 696ft.

Fair

90°F

32°C

Humidity 25%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 50°F (10°C)
Visibility 7.00 mi
Heat Index87°F (31°C)
Last update 18 Sep 5:15 pm CDT
Extended Forecast for

Potomac IL

  • Tonight

    Tonight: Mostly clear, with a low around 59. Light east wind.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 89. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 89 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. Light southeast wind. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 87. Calm wind becoming south around 6 mph in the afternoon.

    High: 87 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 84. Calm wind becoming south southwest 5 to 7 mph in the morning. Chance of precipitation is 50%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Showers likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 63. South southwest wind 3 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 59. Light east wind.
Friday
Increasing clouds, with a high near 89. Calm wind becoming south 5 to 7 mph in the afternoon.
Friday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. Light southeast wind. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 87. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 62. Calm wind.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 84. Calm wind becoming south southwest 5 to 7 mph in the morning. Chance of precipitation is 50%.
Sunday Night
Showers likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 63. South southwest wind 3 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.
Monday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 62.
Tuesday
A 40 percent chance of showers after 1pm. Mostly cloudy, with a high near 79.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 61.
Wednesday
A chance of showers. Partly sunny, with a high near 77.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 58.
Thursday
A chance of showers. Partly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Potomac IL
 40.3°N 87.79°W (Elev. 673 ft)
Last Update:
4:40 pm CDT Sep 18, 2025
Forecast Valid:
5pm CDT Sep 18, 2025-6pm CDT Sep 25, 2025
 
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