National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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 >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

66°F

19°C

Humidity 88%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 4 Jul 11:50 pm CDT
Extended Forecast for

6 Miles WSW Fort Atkinson WI

  • Overnight

    Overnight: Patchy fog before 4am. Otherwise, mostly cloudy, with a low around 63. North wind around 5 mph.

    Low: 63 °F

    Patchy Fog

  • Sunday

    Sunday: Mostly cloudy, with a high near 81. Northeast wind 5 to 10 mph.

    High: 81 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59. Northeast wind 5 to 10 mph.

    Low: 59 °F

    Mostly Clear

  • Monday

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

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85. Calm wind.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 64. South wind around 5 mph becoming calm.

    Low: 64 °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 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    Showers

Detailed Forecast

Overnight
Patchy fog before 4am. Otherwise, mostly cloudy, with a low around 63. North wind around 5 mph.
Sunday
Mostly cloudy, with a high near 81. Northeast wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 59. Northeast wind 5 to 10 mph.
Monday
Sunny, with a high near 82. Northeast wind around 5 mph.
Monday Night
Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 85. Calm wind.
Tuesday Night
Partly cloudy, with a low around 64. 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 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles WSW Fort Atkinson WI
 42.88°N 88.93°W (Elev. 774 ft)
Last Update:
11:16 pm CDT Jul 4, 2026
Forecast Valid:
12am CDT Jul 5, 2026-6pm CDT Jul 11, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation