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Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Partly Cloudy

29°C

84°F

Humidity 40%
Wind Speed SW 15 km/h
Barometer 29.84 in
Dewpoint 14°C (57°F)
Visibility 16 km
Heat Index28°C (83°F)
Last update 20 Jun 5:45 pm CDT
Extended Forecast for

5 Miles SSW Janesville WI

Heat Advisory June 21, 12:00pm until June 23, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 23. South wind 20 to 25 km/h, with gusts as high as 40 km/h.

    Low: 23 °C

    Partly Cloudy

  • Saturday

    Saturday: Sunny and hot, with a high near 34. Heat index values as high as 39. Windy, with a southwest wind 25 to 30 km/h increasing to 35 to 40 km/h in the afternoon. Winds could gust as high as 65 km/h.

    High: 34 °C

    Hot and Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Breezy, with a southwest wind 30 to 35 km/h decreasing to 25 to 30 km/h after midnight. Winds could gust as high as 55 km/h.

    Low: 24 °C

    Mostly Clear
    and Breezy
    then Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 34. Heat index values as high as 39. Southwest wind 25 to 30 km/h, with gusts as high as 45 km/h.

    High: 34 °C

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 23. Southwest wind 20 to 30 km/h, with gusts as high as 40 km/h.

    Low: 23 °C

    Clear

  • Monday

    Monday: A 20 percent chance of showers after 1pm. Sunny and hot, with a high near 34. Southwest wind 20 to 25 km/h, with gusts as high as 40 km/h.

    High: 34 °C

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 21. Southwest wind 20 to 25 km/h decreasing to 10 to 15 km/h after midnight.

    Low: 21 °C

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 31. Northwest wind 10 to 15 km/h becoming southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    High: 31 °C

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 18. Chance of precipitation is 60%.

    Low: 18 °C

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 23. South wind 20 to 25 km/h, with gusts as high as 40 km/h.
Saturday
Sunny and hot, with a high near 34. Heat index values as high as 39. Windy, with a southwest wind 25 to 30 km/h increasing to 35 to 40 km/h in the afternoon. Winds could gust as high as 65 km/h.
Saturday Night
Mostly clear, with a low around 24. Breezy, with a southwest wind 30 to 35 km/h decreasing to 25 to 30 km/h after midnight. Winds could gust as high as 55 km/h.
Sunday
Sunny and hot, with a high near 34. Heat index values as high as 39. Southwest wind 25 to 30 km/h, with gusts as high as 45 km/h.
Sunday Night
Clear, with a low around 23. Southwest wind 20 to 30 km/h, with gusts as high as 40 km/h.
Monday
A 20 percent chance of showers after 1pm. Sunny and hot, with a high near 34. Southwest wind 20 to 25 km/h, with gusts as high as 40 km/h.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 21. Southwest wind 20 to 25 km/h decreasing to 10 to 15 km/h after midnight.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 31. Northwest wind 10 to 15 km/h becoming southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 18. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 31. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 19.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 29. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 18.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Janesville WI
 42.63°N 89.04°W (Elev. 804 m)
Last Update:
5:38 pm CDT Jun 20, 2025
Forecast Valid:
5pm CDT Jun 20, 2025-6pm CDT Jun 27, 2025
 
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