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Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

70°F

21°C

Humidity 94%
Wind Speed Calm
Barometer 29.91 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 16 Jul 1:10 am CDT
Extended Forecast for

Janesville WI

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 88. South wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 88 °F

    Patchy Fog
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 62. Southwest wind around 10 mph becoming northwest after midnight. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    T-storms then
    Slight Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers between 7am and 1pm. Mostly cloudy, with a high near 70. North wind around 10 mph. Chance of precipitation is 20%.

    High: 70 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 52. Northeast wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 76. Calm wind becoming east around 5 mph in the morning.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59. Southeast wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Partly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southeast wind around 5 mph becoming southwest in the afternoon.

    High: 80 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.

    Low: 63 °F

    Chance
    Showers

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 69. Calm wind.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 88. South wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 62. Southwest wind around 10 mph becoming northwest after midnight. Chance of precipitation is 50%.
Thursday
A slight chance of showers between 7am and 1pm. Mostly cloudy, with a high near 70. North wind around 10 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 52. Northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 76. Calm wind becoming east around 5 mph in the morning.
Friday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59. Southeast wind around 5 mph becoming calm in the evening.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southeast wind around 5 mph becoming southwest in the afternoon.
Saturday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Sunday
A 20 percent chance of showers. Partly sunny, with a high near 80.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 60.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 81.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Tuesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.69°N 89.01°W (Elev. 863 ft)
Last Update:
1:38 am CDT Jul 16, 2025
Forecast Valid:
1am CDT Jul 16, 2025-6pm CDT Jul 22, 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