Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

64°F

18°C

Humidity 94%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 63°F (17°C)
Visibility 7.00 mi
Last update 5 Jul 4:50 am CDT
Extended Forecast for

3 Miles E Janesville WI

  • Today

    Today: Patchy fog before 9am.  Otherwise, mostly cloudy, with a high near 81. Northeast wind 5 to 10 mph.

    High: 81 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Mostly clear, with a low around 58. Northeast wind 5 to 10 mph becoming light  in the evening.

    Low: 58 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 82. Northeast wind 5 to 10 mph.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. Northeast wind around 5 mph becoming calm  in the evening.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. Calm wind becoming north around 5 mph.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 62. South wind around 5 mph becoming calm.

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers after 1pm.  Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.

    High: 85 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Mostly cloudy, with a low around 66. Southwest wind 5 to 10 mph.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm.  Mostly cloudy, with a high near 82. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 81. Northeast wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 58. Northeast wind 5 to 10 mph becoming light in the evening.
Monday
Sunny, with a high near 82. Northeast wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 57. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 84. Calm wind becoming north around 5 mph.
Tuesday Night
Partly cloudy, with a low around 62. South wind around 5 mph becoming calm.
Wednesday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82. Chance of precipitation is 40%.
Thursday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 59.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Janesville WI
 42.69°N 88.95°W (Elev. 850 ft)
4:11 am CDT Jul 5, 2026
5am CDT Jul 5, 2026-6pm CDT Jul 11, 2026
 
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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