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

Chicago / West Chicago, Dupage Airport (KDPA)

Lat: 41.9°NLon: 88.25°WElev: 758ft.

Fair

70°F

21°C

Humidity 53%
Wind Speed Calm
Barometer 30.01 in (1015.9 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 29 Jul 8:52 pm CDT
Extended Forecast for

Saint Charles IL

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, clear, with a low around 60. East northeast wind around 5 mph becoming calm.

    Low: 60 °F

    Clear then
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely, then showers and possibly a thunderstorm after 4pm. High near 78. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.

    High: 78 °F

    Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 62. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%.

    Low: 62 °F

    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms after 10am. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, clear, with a low around 60. East northeast wind around 5 mph becoming calm.
Thursday
Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
Friday
Showers likely, then showers and possibly a thunderstorm after 4pm. High near 78. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm. Low around 62. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%.
Saturday
Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms after 10am. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Mostly clear, with a low around 59.
Monday
Sunny, with a high near 80.
Monday Night
Mostly clear, with a low around 63.
Tuesday
Sunny, with a high near 84.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles IL
 41.92°N 88.29°W
Last Update:
8:31 pm CDT Jul 29, 2026
Forecast Valid:
9pm CDT Jul 29, 2026-6pm CDT Aug 5, 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