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.

Partly Cloudy

73°F

23°C

Humidity 65%
Wind Speed Vrbl 5 mph
Barometer 30.13 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 18 Jul 12:45 pm CDT
Extended Forecast for

Janesville WI

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. South wind around 5 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 65. South wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly before 3pm. Mostly cloudy, with a high near 83. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 83 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 1am, then a slight chance of showers after 4am. Mostly cloudy, with a low around 64. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers. Partly sunny, with a high near 77. East wind 5 to 10 mph.

    High: 77 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly after 1am. Partly cloudy, with a low around 59. East wind around 5 mph.

    Low: 59 °F

    Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers. Partly sunny, with a high near 79. Southeast wind 5 to 10 mph.

    High: 79 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Southeast wind 5 to 10 mph.

    Low: 65 °F

    Chance
    T-storms

  • Tuesday

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

    High: 85 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. South wind around 5 mph.
Tonight
A 10 percent chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 65. South wind around 5 mph becoming calm in the evening.
Saturday
Showers and thunderstorms likely, mainly before 3pm. Mostly cloudy, with a high near 83. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
A slight chance of showers and thunderstorms before 1am, then a slight chance of showers after 4am. Mostly cloudy, with a low around 64. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Sunday
A 20 percent chance of showers. Partly sunny, with a high near 77. East wind 5 to 10 mph.
Sunday Night
A 30 percent chance of showers, mainly after 1am. Partly cloudy, with a low around 59. East wind around 5 mph.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 79. Southeast wind 5 to 10 mph.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Southeast wind 5 to 10 mph.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 85.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Wednesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.67°N 89.04°W (Elev. 774 ft)
Last Update:
11:54 am CDT Jul 18, 2025
Forecast Valid:
12pm CDT Jul 18, 2025-6pm CDT Jul 24, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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