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.

A Few Clouds with Haze

70°F

21°C

Humidity 83%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 64°F (18°C)
Visibility 6.00 mi
Last update 14 Aug 8:45 am CDT
Extended Forecast for

Janesville WI

  • Today

    Today: Sunny, with a high near 82. Calm wind becoming southeast around 5 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Light south wind increasing to 5 to 10 mph in the morning.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 69. South wind around 5 mph.

    Low: 69 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 88. South wind 5 to 10 mph.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 87. South wind 5 to 10 mph becoming southeast in the afternoon. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68. East wind around 5 mph.

    Low: 68 °F

    Chance
    T-storms

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 82. Calm wind becoming southeast around 5 mph.
Tonight
Mostly clear, with a low around 62. Calm wind.
Friday
Sunny, with a high near 85. Light south wind increasing to 5 to 10 mph in the morning.
Friday Night
Partly cloudy, with a low around 69. South wind around 5 mph.
Saturday
Mostly sunny, with a high near 88. South wind 5 to 10 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 87. South wind 5 to 10 mph becoming southeast in the afternoon. Chance of precipitation is 30%.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68. East wind around 5 mph.
Monday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Tuesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.69°N 89.03°W (Elev. 860 ft)
Last Update:
6:59 am CDT Aug 14, 2025
Forecast Valid:
9am CDT Aug 14, 2025-6pm CDT Aug 20, 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