Extreme Heat Across the Southern U.S.; Flash Flooding Threats in the Mid-Atlantic, Northeast, and Four Corners Region

Dangerous and extreme heat will remain across portions of the southern U.S. this week. Heavy rainfall may bring significant flash flooding across portions of the Mid-Atlantic and Northeast through the night, and additional flash flooding concerns across New England on Wednesday. Monsoonal thunderstorms will bring a flash flood risk to the Four Corners region, especially in burn scar areas Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

55°F

13°C

Humidity NA
Wind Speed NW 6 mph
Barometer 30.00 in
Dewpoint N/A
Visibility 10.00 mi
Wind Chill54°F (12°C)
Last update 29 Jul 5:45 am CDT
Extended Forecast for

Janesville WI

  • Today

    Today: Sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 87 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 63. South wind around 5 mph becoming calm  in the evening.

    Low: 63 °F

    Increasing
    Clouds

  • Friday

    Friday: Showers, with thunderstorms also possible after 4pm.  High near 75. South 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: 75 °F

    Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm.  Low around 61. East wind around 10 mph.  Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 61 °F

    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm.  Partly sunny, with a high near 77. Northeast wind 10 to 15 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. Northeast wind 5 to 10 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 60. Calm wind.
Thursday
Increasing clouds, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Increasing clouds, with a low around 63. South wind around 5 mph becoming calm in the evening.
Friday
Showers, with thunderstorms also possible after 4pm. High near 75. South 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 and possibly a thunderstorm. Low around 61. East wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 77. Northeast wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Partly cloudy, with a low around 59. Northeast wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Mostly clear, with a low around 59.
Monday
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 61.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.69°N 89.01°W (Elev. 863 ft)
4:36 am CDT Jul 29, 2026
6am CDT Jul 29, 2026-6pm CDT Aug 4, 2026
 
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Additional Resources

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Hourly Weather Forecast

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