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

Hazardous Weather Conditions

Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

Fair

90°F

32°C

Humidity 52%
Wind Speed S 9 G 18 mph
Barometer 29.91 in (1012.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 4 Sep 2:52 pm CDT
Extended Forecast for

Mount Prospect IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms before 4pm. Sunny, with a high near 91. Heat index values as high as 98. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 91 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between midnight and 3am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 74. West wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Chance
    T-storms and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 84 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 79. East northeast wind 5 to 10 mph.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Labor Day

    Labor Day: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 65.

    Low: 65 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 87.

    High: 87 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms before 4pm. Sunny, with a high near 91. Heat index values as high as 98. South wind 5 to 10 mph, with gusts as high as 15 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between midnight and 3am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 74. West wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
Partly cloudy, with a low around 66. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Sunny, with a high near 79. East northeast wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 64.
Labor Day
Mostly sunny, with a high near 81.
Monday Night
Mostly cloudy, with a low around 65.
Tuesday
Partly sunny, with a high near 87.
Tuesday Night
A chance of showers after 1am. Partly cloudy, with a low around 72.
Wednesday
Partly sunny, with a high near 90.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Prospect IL
 42.09°N 87.92°W
Last Update:
3:01 pm CDT Sep 4, 2026
Forecast Valid:
3pm CDT Sep 4, 2026-6pm CDT Sep 10, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation