Severe Thunderstorms and Heavy Rainfall Across the Midwest into the Great Lakes Region; Significant Heat in the Southwest

Strong to severe storms may produce damaging winds, isolated hail, and a few tornadoes from the Midwest into the lower Great Lakes. These storms may also produce areas of heavy rain and flash flooding. Significant heat will continue across parts of the Desert Southwest into western Texas and north Alaska. Dangerous heat will also build into the Eastern and Central U.S. and continue into next week. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Light Drizzle

72°F

22°C

Humidity 94%
Wind Speed E 8 mph
Barometer 29.81 in
Dewpoint 70°F (21°C)
Visibility 6.00 mi
Last update 18 Jun 10:45 am CDT
Extended Forecast for

Darien WI

  • Today

    Today: Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. Some of the storms could produce heavy rainfall.  Patchy fog after 2pm. High near 73. Northeast wind 5 to 10 mph.  Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    High: 73 °F

    Showers
    Likely then
    Heavy Rain
    and Patchy
    Fog

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly before 9pm, then a chance of showers and thunderstorms after 9pm. Some of the storms could produce heavy rainfall.  Patchy fog before 8pm. Low around 62. Northwest wind 5 to 10 mph.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Heavy Rain
    and Patchy
    Fog then
    Chance
    T-storms

  • Juneteenth

    Juneteenth: A slight chance of thunderstorms before 7am.  Mostly sunny, with a high near 81. Northwest wind 5 to 10 mph.  Chance of precipitation is 10%.

    High: 81 °F

    Slight Chance
    T-storms then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. Southwest wind around 5 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 84. Southwest wind 5 to 15 mph.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 71. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 71 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 92. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 92 °F

    Hot and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 74. Southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 74 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 93.

    High: 93 °F

    Hot

Detailed Forecast

Today
Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. Some of the storms could produce heavy rainfall. Patchy fog after 2pm. High near 73. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Tonight
Showers and possibly a thunderstorm, mainly before 9pm, then a chance of showers and thunderstorms after 9pm. Some of the storms could produce heavy rainfall. Patchy fog before 8pm. Low around 62. Northwest wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Juneteenth
A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 81. Northwest wind 5 to 10 mph. Chance of precipitation is 10%.
Thursday Night
Mostly clear, with a low around 62. Southwest wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Southwest wind 5 to 15 mph.
Friday Night
Mostly clear, with a low around 71. South wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Sunny and hot, with a high near 92. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Clear, with a low around 74. Southwest wind around 15 mph, with gusts as high as 25 mph.
Sunday
Sunny and hot, with a high near 93.
Sunday Night
Mostly clear, with a low around 73.
Monday
Sunny and hot, with a high near 92.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Darien WI
 42.61°N 88.71°W (Elev. 945 ft)
10:24 am CDT Jun 18, 2025
10am CDT Jun 18, 2025-6pm CDT Jun 24, 2025
 
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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