Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast across parts of the Upper Midwest into the Great Lakes, the Northeast, and the central High Plains. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

82°F

28°C

Humidity 70%
Wind Speed SW 12 mph
Barometer 29.96 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 1 Jul 8:45 am CDT
Extended Forecast for

Beloit WI

Extreme Heat Warning July 1, 10:26am until July 1, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 1, 10:26am until July 1, 07:00pm

    NOW until 7:00pm Wed

    Extreme Heat Warning

  • Today

    High: 93 °F

    Hot

  • Tonight

    Tonight: A chance of showers before 3am, then a chance of showers after 4am.  Partly cloudy, with a low around 76. Southwest wind 10 to 15 mph.  Chance of precipitation is 30%.

    Low: 76 °F

    Mostly Clear
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms after 1pm.  Mostly sunny and hot, with a high near 91. Heat index values as high as 101. Southwest wind 10 to 15 mph.  Chance of precipitation is 30%.

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 71. Southwest wind 5 to 10 mph.

    Low: 71 °F

    Chance
    T-storms

  • Friday

    Friday: Showers and possibly a thunderstorm.  High near 90. Southwest 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.

    High: 90 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 71. Southwest wind 5 to 10 mph becoming light  after midnight.  Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Showers
    Likely

  • Independence Day

    Independence Day: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Partly sunny, with a high near 86. Light southwest wind increasing to 5 to 10 mph in the morning.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 86 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 67. Northeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly sunny and hot, with a high near 93. Heat index values as high as 102. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
A chance of showers before 3am, then a chance of showers after 4am. Partly cloudy, with a low around 76. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 101. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southwest wind 5 to 10 mph.
Friday
Showers and possibly a thunderstorm. High near 90. Southwest 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.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Southwest wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Independence Day
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. Light southwest wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 30%.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 65.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 87.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Beloit WI
 42.52°N 89.02°W (Elev. 745 ft)
8:52 am CDT Jul 1, 2026
10am CDT Jul 1, 2026-6pm CDT Jul 7, 2026
 
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Additional Resources

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