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.

Fog/Mist

39°F

4°C

Humidity 100%
Wind Speed NE 16 mph
Barometer 29.87 in
Dewpoint 39°F (4°C)
Visibility 2.00 mi
Wind Chill30°F (-1°C)
Last update 10 Mar 8:45 am CDT
Extended Forecast for

2 Miles N Janesville WI

Dense Fog Advisory until March 10, 11:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until March 10, 11:00am

    NOW until 11:00am Tue

    Dense Fog Advisory

  • Today

    High: 52 °F

    Dense Fog
    then Chance
    Rain

  • Tonight

    Tonight: Rain and thunderstorms before 2am, then a chance of showers and thunderstorms between 2am and 4am, then a chance of showers after 4am. Patchy fog. Low around 33. Northeast wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 33 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Rain and snow showers, becoming all snow after noon. High near 37. Northwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 37 °F

    Rain/Snow
    then Snow
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 23. Northwest wind 5 to 15 mph.

    Low: 23 °F

    Gradual
    Clearing

  • Thursday

    Thursday: Increasing clouds, with a high near 46. Southwest wind 5 to 15 mph.

    High: 46 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Rain likely before 4am, then rain likely, possibly mixed with snow. Cloudy, with a low around 35. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain Likely
    then
    Rain/Snow
    Likely and
    Breezy

  • Friday

    Friday: A 10 percent chance of snow before 7am. Mostly cloudy, with a high near 45. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 45 °F

    Breezy.
    Slight Chance
    Snow then
    Partly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 27. Northwest wind 5 to 10 mph becoming east after midnight.

    Low: 27 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Today
A chance of rain, with thunderstorms also possible after 4pm. Widespread dense fog, mainly before 10am. Otherwise, mostly cloudy, with a high near 52. Northeast wind 10 to 15 mph. Chance of precipitation is 50%.
Tonight
Rain and thunderstorms before 2am, then a chance of showers and thunderstorms between 2am and 4am, then a chance of showers after 4am. Patchy fog. Low around 33. Northeast wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Rain and snow showers, becoming all snow after noon. High near 37. Northwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 23. Northwest wind 5 to 15 mph.
Thursday
Increasing clouds, with a high near 46. Southwest wind 5 to 15 mph.
Thursday Night
Rain likely before 4am, then rain likely, possibly mixed with snow. Cloudy, with a low around 35. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Friday
A 10 percent chance of snow before 7am. Mostly cloudy, with a high near 45. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 27. Northwest wind 5 to 10 mph becoming east after midnight.
Saturday
A chance of snow before 1pm, then a chance of rain and snow. Cloudy, with a high near 45. Chance of precipitation is 40%.
Saturday Night
Rain likely, possibly mixed with snow, mainly after 1am. Cloudy, with a low around 31. Chance of precipitation is 70%.
Sunday
Rain and snow. High near 38. Breezy. Chance of precipitation is 80%.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 14.
Monday
A 20 percent chance of snow. Mostly cloudy, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Janesville WI
 42.71°N 89°W (Elev. 892 ft)
Last Update:
9:22 am CDT Mar 10, 2026
Forecast Valid:
9am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
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