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

50°F

10°C

Humidity 100%
Wind Speed N 3 mph
Barometer 29.74 in
Dewpoint 50°F (10°C)
Visibility 0.15 mi
Last update 10 Mar 4:15 am CDT
Extended Forecast for

4 Miles WNW Beloit WI

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

    NOW until 11:00am Tue

    Dense Fog Advisory

  • Overnight

    Low: 43 °F

    Dense Fog

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Widespread dense fog, mainly before 10am. Otherwise, mostly cloudy, with a high near 53. Northeast wind 10 to 15 mph.

    High: 53 °F

    Dense Fog
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms before 4am, then a chance of showers. Patchy fog. Low around 34. Northeast wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 34 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Rain showers before noon, then snow showers, possibly mixed with rain between noon and 1pm, then a chance of snow showers after 1pm. High near 38. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 38 °F

    Showers then
    Rain/Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 24. Northwest wind 5 to 15 mph.

    Low: 24 °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, mainly after 1am. Mostly cloudy, with a low around 35. Windy, with a south wind 15 to 25 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Rain Likely
    and Windy

  • Friday

    Friday: Partly sunny, with a high near 46. Windy, with a west wind 20 to 25 mph, with gusts as high as 35 mph.

    High: 46 °F

    Partly Sunny
    and Windy

Detailed Forecast

Overnight
Widespread dense fog. Otherwise, cloudy, with a low around 43. East wind around 5 mph.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Widespread dense fog, mainly before 10am. Otherwise, mostly cloudy, with a high near 53. Northeast wind 10 to 15 mph.
Tuesday Night
Showers and thunderstorms before 4am, then a chance of showers. Patchy fog. Low around 34. Northeast wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Rain showers before noon, then snow showers, possibly mixed with rain between noon and 1pm, then a chance of snow showers after 1pm. High near 38. Breezy, with a northwest wind 15 to 20 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 24. Northwest wind 5 to 15 mph.
Thursday
Increasing clouds, with a high near 46. Southwest wind 5 to 15 mph.
Thursday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 35. Windy, with a south wind 15 to 25 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Partly sunny, with a high near 46. Windy, with a west wind 20 to 25 mph, with gusts as high as 35 mph.
Friday Night
Mostly cloudy, with a low around 27.
Saturday
A chance of snow before 1pm, then a chance of rain and snow. Cloudy, with a high near 46. Chance of precipitation is 30%.
Saturday Night
Rain and snow likely. Cloudy, with a low around 32. Chance of precipitation is 60%.
Sunday
Rain and snow. High near 39. Breezy. Chance of precipitation is 80%.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 14. Blustery.
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:
4 Miles WNW Beloit WI
 42.54°N 89.1°W (Elev. 889 ft)
Last Update:
3:57 am CDT Mar 10, 2026
Forecast Valid:
4am 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