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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Light Rain Fog/Mist

65°F

18°C

Humidity 100%
Wind Speed Calm
Barometer 29.95 in (1013.5 mb)
Dewpoint 65°F (18°C)
Visibility 2.50 mi
Last update 19 Sep 6:51 pm CDT
Extended Forecast for

Woodstock IL

Flood Watch September 19, 07:10pm until September 20, 07:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch September 19, 07:10pm until September 20, 07:00am

    NOW until 7:00am Sun

    Flood Watch

  • Tonight

    Low: 61 °F

    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 10am, then a chance of showers. Cloudy, with a high near 65. Northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 65 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A slight chance of showers before 7pm, then a slight chance of showers after 1am. Mostly cloudy, with a low around 55. East northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers, mainly before 1pm. Cloudy, with a high near 63. East northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly after 1am. Cloudy, with a low around 51. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 61.

    High: 61 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm. Low around 61. East wind around 5 mph becoming north northeast after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Sunday
Showers likely and possibly a thunderstorm before 10am, then a chance of showers. Cloudy, with a high near 65. Northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A slight chance of showers before 7pm, then a slight chance of showers after 1am. Mostly cloudy, with a low around 55. East northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday
A 40 percent chance of showers, mainly before 1pm. Cloudy, with a high near 63. East northeast wind around 15 mph, with gusts as high as 25 mph.
Monday Night
A 30 percent chance of showers, mainly after 1am. Cloudy, with a low around 51. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 61.
Tuesday Night
Mostly cloudy, with a low around 50.
Wednesday
Partly sunny, with a high near 63.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Partly sunny, with a high near 66.
Thursday Night
Mostly cloudy, with a low around 53.
Friday
Partly sunny, with a high near 70.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Woodstock IL
 42.32°N 88.44°W
Last Update:
4:01 pm CDT Sep 19, 2026
Forecast Valid:
7pm CDT Sep 19, 2026-6pm CDT Sep 26, 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