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.

Light Rain

45°F

7°C

Humidity 93%
Wind Speed SE 9 mph
Barometer 29.96 in
Dewpoint 43°F (6°C)
Visibility 4.00 mi
Wind Chill40°F (4°C)
Last update 30 Apr 7:45 pm CDT
Extended Forecast for

5 Miles SSW Janesville WI

Frost Advisory May 1, 12:00am until May 1, 08:00am
Flood Warning April 30, 07:48pm until May 7, 01:00am
Click here for hazard details and duration
Frost Advisory
Flood Warning
  •  
    Flood Warning April 30, 07:48pm until May 7, 01:00am

    NOW until 1:00am Thu

    Flood Warning

  • Tonight

    Low: 34 °F

    Showers then
    Scattered
    Showers

  • Friday

    Friday: Isolated showers after 1pm. Areas of frost before 9am. Otherwise, partly sunny, with a high near 51. North wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 51 °F

    Areas Frost
    then Isolated
    Showers

  • Friday Night

    Friday Night: Widespread frost, mainly after 4am. Otherwise, partly cloudy, with a low around 32. North wind around 5 mph becoming calm in the evening.

    Low: 32 °F

    Mostly Cloudy
    then Frost

  • Saturday

    Saturday: Widespread frost, mainly before 8am. Otherwise, mostly sunny, with a high near 55. Light north wind becoming northwest 5 to 10 mph in the morning.

    High: 55 °F

    Frost then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39. Southwest wind 5 to 10 mph.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 64. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 64 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 44. Southwest wind 5 to 10 mph becoming light in the evening.

    Low: 44 °F

    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 72. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 72 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

Detailed Forecast

Tonight
Showers, mainly before 10pm. Patchy frost after 3am. Low around 34. Northeast wind around 5 mph becoming north after midnight. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Isolated showers after 1pm. Areas of frost before 9am. Otherwise, partly sunny, with a high near 51. North wind 5 to 10 mph. Chance of precipitation is 20%.
Friday Night
Widespread frost, mainly after 4am. Otherwise, partly cloudy, with a low around 32. North wind around 5 mph becoming calm in the evening.
Saturday
Widespread frost, mainly before 8am. Otherwise, mostly sunny, with a high near 55. Light north wind becoming northwest 5 to 10 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 39. Southwest wind 5 to 10 mph.
Sunday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 64. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 44. Southwest wind 5 to 10 mph becoming light in the evening.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 72. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Monday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 45. Chance of precipitation is 30%.
Tuesday
A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 62.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 41.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 56.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 38.
Thursday
Mostly sunny, with a high near 58.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Janesville WI
 42.63°N 89.04°W (Elev. 804 ft)
Last Update:
7:34 pm CDT Apr 30, 2026
Forecast Valid:
7pm CDT Apr 30, 2026-6pm CDT May 7, 2026
 
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