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

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

88°F

31°C

Humidity 75%
Wind Speed Vrbl 6 mph
Barometer 29.96 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 1 Sep 12:45 pm CDT
Extended Forecast for

Edgerton WI

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, mainly before 4pm, then a chance of rain and thunderstorms after 5pm. Partly sunny and hot, with a high near 90. Heat index values as high as 96. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 90 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of sprinkles before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Chance
    Sprinkles

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 91. Heat index values as high as 97. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 91 °F

    Hot

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 88. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 40%.

    High: 88 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. South wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 87. Southeast wind around 5 mph becoming southwest in the afternoon. Chance of precipitation is 50%.

    High: 87 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm.

    Low: 67 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 85.

    High: 85 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, mainly before 4pm, then a chance of rain and thunderstorms after 5pm. Partly sunny and hot, with a high near 90. Heat index values as high as 96. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
Tonight
A chance of sprinkles before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny and hot, with a high near 91. Heat index values as high as 97. Light southwest wind increasing to 5 to 10 mph in the morning.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.
Thursday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 88. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 40%.
Thursday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. South wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 87. Southeast wind around 5 mph becoming southwest in the afternoon. Chance of precipitation is 50%.
Friday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm.
Saturday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 85.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 83.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 63.
Labor Day
A 20 percent chance of showers. Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Edgerton WI
 42.84°N 89.06°W (Elev. 892 ft)
Last Update:
1:41 pm CDT Sep 1, 2026
Forecast Valid:
1pm CDT Sep 1, 2026-6pm CDT Sep 7, 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