National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tracking Winter Weather and Frigid Temperatures This Weekend

Another clipper will drop into the Northern Plains and Upper Midwest into Sunday with snow and gusty winds contributing to some areas of blizzard conditions and snow squalls. Impactful snowfall will occur up and down the East Coast Sunday extending from the western Florida Panhandle to Maine. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Partly Cloudy

5°F

-15°C

Humidity 85%
Wind Speed W 9 mph
Barometer 30.01 in
Dewpoint 1°F (-17°C)
Visibility 7.00 mi
Wind Chill-9°F (-23°C)
Last update 18 Jan 4:15 am CST
Extended Forecast for

Janesville WI

Cold Weather Advisory January 19, 03:00am until January 19, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • Today

    Today: Snow, mainly after 3pm. High near 15. Wind chill values between -10 and zero. Southwest wind 10 to 15 mph. Chance of precipitation is 90%. Total daytime snow accumulation of less than one inch possible.

    High: 15 °F

    Mostly Cloudy
    then Snow

  • Tonight

    Tonight: Snow, mainly before 10pm. Patchy blowing snow after 11pm. Low around -3. Wind chill values between -15 and -25. Windy, with a southwest wind 10 to 15 mph becoming northwest 20 to 25 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: -3 °F

    Snow and
    Patchy
    Blowing Snow

  • M.L.King Day

    M.L.King Day: Patchy blowing snow before 9am. Mostly sunny and cold, with a high near 4. Wind chill values between -15 and -25. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 4 °F

    Patchy
    Blowing Snow
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around -4. Wind chill values between -10 and -15. West wind 5 to 10 mph.

    Low: -4 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 15. Southwest wind around 5 mph.

    High: 15 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of snow. Mostly cloudy, with a temperature falling to near 10 by 8pm, then rising to around 19 during the remainder of the night. South wind around 5 mph becoming west after midnight.

    Low: 10 °F⇑

    Chance Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 23. West wind 5 to 15 mph.

    High: 23 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 4. West wind 5 to 10 mph.

    Low: 4 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 16.

    High: 16 °F

    Mostly Sunny

Detailed Forecast

Today
Snow, mainly after 3pm. High near 15. Wind chill values between -10 and zero. Southwest wind 10 to 15 mph. Chance of precipitation is 90%. Total daytime snow accumulation of less than one inch possible.
Tonight
Snow, mainly before 10pm. Patchy blowing snow after 11pm. Low around -3. Wind chill values between -15 and -25. Windy, with a southwest wind 10 to 15 mph becoming northwest 20 to 25 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
M.L.King Day
Patchy blowing snow before 9am. Mostly sunny and cold, with a high near 4. Wind chill values between -15 and -25. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph.
Monday Night
Partly cloudy, with a low around -4. Wind chill values between -10 and -15. West wind 5 to 10 mph.
Tuesday
Sunny, with a high near 15. Southwest wind around 5 mph.
Tuesday Night
A 50 percent chance of snow. Mostly cloudy, with a temperature falling to near 10 by 8pm, then rising to around 19 during the remainder of the night. South wind around 5 mph becoming west after midnight.
Wednesday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 23. West wind 5 to 15 mph.
Wednesday Night
Partly cloudy, with a low around 4. West wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 16.
Thursday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 7.
Friday
A 20 percent chance of snow. Mostly cloudy, with a high near 20.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around -1.
Saturday
A 30 percent chance of snow. Partly sunny and cold, with a high near 8.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.69°N 89.01°W (Elev. 863 ft)
Last Update:
3:07 am CST Jan 18, 2026
Forecast Valid:
4am CST Jan 18, 2026-6pm CST Jan 24, 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