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Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Freezing Fog

30°F

-1°C

Humidity 100%
Wind Speed Calm
Barometer 30.20 in
Dewpoint 30°F (-1°C)
Visibility 0.15 mi
Last update 4 Mar 3:35 am CST
Extended Forecast for

2 Miles W Darien WI

Dense Fog Advisory March 4, 03:54am until March 4, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory March 4, 03:54am until March 4, 09:00am

    NOW until 9:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 28 °F

    Dense
    Freezing Fog

  • Wednesday

    Wednesday: Patchy dense fog between 8am and 9am. Widespread dense freezing fog before 8am. Otherwise, partly sunny, with a high near 53. Light east wind increasing to 5 to 10 mph in the morning.

    High: 53 °F

    Dense
    Freezing Fog
    and Patchy
    Dense Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain, mainly after 1am. Patchy fog after 2am. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm.

    Low: 38 °F

    Mostly Cloudy
    then Chance
    Rain and
    Patchy Fog

  • Thursday

    Thursday: Rain likely, mainly before noon. Patchy fog before noon. Otherwise, cloudy, with a high near 50. Northeast wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 50 °F

    Rain Likely
    and Patchy
    Fog then
    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after 3am. Mostly cloudy, with a low around 39. Calm wind becoming southeast around 5 mph after midnight.

    Low: 39 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Rain and possibly a thunderstorm. High near 66. Southeast wind 5 to 15 mph becoming south in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 66 °F

    Rain

  • Friday Night

    Friday Night: Rain before 9pm, then rain and possibly a thunderstorm between 9pm and 3am, then rain after 3am. Low around 42. South wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Rain

  • Saturday

    Saturday: A 20 percent chance of rain before noon. Mostly cloudy, then gradually becoming sunny, with a high near 51. Northwest wind 10 to 15 mph.

    High: 51 °F

    Slight Chance
    Rain then
    Mostly Sunny

Detailed Forecast

Overnight
Widespread dense freezing fog. Cloudy, with a low around 28. Calm wind.
Wednesday
Patchy dense fog between 8am and 9am. Widespread dense freezing fog before 8am. Otherwise, partly sunny, with a high near 53. Light east wind increasing to 5 to 10 mph in the morning.
Wednesday Night
A 50 percent chance of rain, mainly after 1am. Patchy fog after 2am. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm.
Thursday
Rain likely, mainly before noon. Patchy fog before noon. Otherwise, cloudy, with a high near 50. Northeast wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 20 percent chance of rain after 3am. Mostly cloudy, with a low around 39. Calm wind becoming southeast around 5 mph after midnight.
Friday
Rain and possibly a thunderstorm. High near 66. Southeast wind 5 to 15 mph becoming south in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Rain before 9pm, then rain and possibly a thunderstorm between 9pm and 3am, then rain after 3am. Low around 42. South wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 20 percent chance of rain before noon. Mostly cloudy, then gradually becoming sunny, with a high near 51. Northwest wind 10 to 15 mph.
Saturday Night
Mostly clear, with a low around 33.
Sunday
Mostly sunny, with a high near 59. Breezy.
Sunday Night
Mostly clear, with a low around 40.
Monday
Sunny, with a high near 68.
Monday Night
A 20 percent chance of rain and thunderstorms. Mostly clear, with a low around 49.
Tuesday
Rain likely. Partly sunny, with a high near 66. Breezy. Chance of precipitation is 70%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Darien WI
 42.59°N 88.75°W (Elev. 889 ft)
Last Update:
3:47 am CST Mar 4, 2026
Forecast Valid:
3am CST Mar 4, 2026-6pm CDT Mar 10, 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