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Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fog/Mist

37°F

3°C

Humidity 100%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 37°F (3°C)
Visibility 0.75 mi
Last update 5 Mar 3:35 am CST
Extended Forecast for

Janesville WI

Dense Fog Advisory March 5, 03:59am until March 5, 12:00pm
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory March 5, 03:59am until March 5, 12:00pm

    NOW until 12:00pm Thu

    Dense Fog Advisory

  • Overnight

    Low: 39 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before 9am. Patchy fog before 3pm, then patchy fog after 4pm. Otherwise, cloudy, with a high near 49. Northeast wind around 5 mph.

    High: 49 °F

    Chance Rain
    and Patchy
    Fog then
    Patchy Fog

  • Thursday Night

    Thursday Night: Patchy fog. Otherwise, cloudy, with a low around 40. East wind around 5 mph becoming southeast after midnight.

    Low: 40 °F

    Patchy Fog

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 67. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 67 °F

    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 48. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 56. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 56 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 33. Northwest wind 5 to 10 mph becoming southwest after midnight.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 60. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 60 °F

    Sunny

Detailed Forecast

Overnight
A 20 percent chance of rain. Patchy fog after 4am. Otherwise, cloudy, with a low around 39. Northeast wind around 5 mph.
Thursday
A 30 percent chance of rain, mainly before 9am. Patchy fog before 3pm, then patchy fog after 4pm. Otherwise, cloudy, with a high near 49. Northeast wind around 5 mph.
Thursday Night
Patchy fog. Otherwise, cloudy, with a low around 40. East wind around 5 mph becoming southeast after midnight.
Friday
Showers and possibly a thunderstorm. High near 67. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and possibly a thunderstorm. Low around 48. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 20 percent chance of showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 56. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Mostly clear, with a low around 33. Northwest wind 5 to 10 mph becoming southwest after midnight.
Sunday
Sunny, with a high near 60. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 69.
Monday Night
A 20 percent chance of rain. Mostly clear, with a low around 44.
Tuesday
Rain likely. Mostly sunny, with a high near 64. Chance of precipitation is 70%.
Tuesday Night
Rain. Low around 35. Chance of precipitation is 80%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 49. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.67°N 89.04°W (Elev. 774 ft)
Last Update:
3:34 am CST Mar 5, 2026
Forecast Valid:
3am CST Mar 5, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation