Heat Expands for Center of the Nation; Severe Thunderstorms for Plains and Upper Midwest

Dangerous heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest. Critical fire weather for portions of the Intermountain West. Risk for severe thunderstorms and flash flooding across the Upper Midwest/Great Lakes, Ohio Valley, and portions of the mid-Atlantic. Active monsoonal moisture fuels thunderstorms over the Southwest. Hurricane Fausto in the Pacific, should weaken Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fog/Mist

75°F

24°C

Humidity 94%
Wind Speed SW 5 mph
Barometer 29.92 in
Dewpoint 73°F (23°C)
Visibility 4.00 mi
Last update 26 Jul 8:45 am CDT
Extended Forecast for

6 Miles SW Whitewater WI

Heat Advisory July 26, 12:00pm until July 26, 09:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Partly sunny and hot, with a high near 90. Heat index values as high as 102. Southwest wind 5 to 10 mph.

    High: 90 °F

    Hot

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly between 1am and 4am.  Partly cloudy, with a low around 71. Southwest wind around 5 mph.

    Low: 71 °F

    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms before 11am.  Mostly cloudy, then gradually becoming sunny and hot, with a high near 91. Heat index values as high as 100. Southwest wind 5 to 15 mph becoming northwest in the morning.

    High: 91 °F

    Chance
    T-storms then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 67. West wind 5 to 10 mph becoming north after midnight.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. North wind around 10 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. Northeast wind around 5 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. Calm wind becoming north around 5 mph in the morning.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. Northeast wind around 5 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny and hot, with a high near 90. Heat index values as high as 102. Southwest wind 5 to 10 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly between 1am and 4am. Partly cloudy, with a low around 71. Southwest wind around 5 mph.
Monday
A 50 percent chance of showers and thunderstorms before 11am. Mostly cloudy, then gradually becoming sunny and hot, with a high near 91. Heat index values as high as 100. Southwest wind 5 to 15 mph becoming northwest in the morning.
Monday Night
Partly cloudy, with a low around 67. West wind 5 to 10 mph becoming north after midnight.
Tuesday
Mostly sunny, with a high near 83. North wind around 10 mph.
Tuesday Night
Mostly clear, with a low around 59. Northeast wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 84. Calm wind becoming north around 5 mph in the morning.
Wednesday Night
Mostly clear, with a low around 59. Northeast wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 62.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SW Whitewater WI
 42.77°N 88.82°W (Elev. 948 ft)
8:37 am CDT Jul 26, 2026
9am CDT Jul 26, 2026-6pm CDT Aug 1, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database