Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair with Haze and Windy

3°F

-16°C

Humidity 72%
Wind Speed W 26 G 33 mph
Barometer 29.97 in
Dewpoint -4°F (-20°C)
Visibility 2.00 mi
Wind Chill-20°F (-29°C)
Last update 19 Jan 4:15 am CST
Extended Forecast for

5 Miles SSW Janesville WI

Winter Weather Advisory January 19, 04:30am until January 19, 12:00pm
Cold Weather Advisory January 19, 04:30am until January 19, 12:00pm
Click here for hazard details and duration
Winter Weather Advisory
Cold Weather Advisory
  •  
    Winter Weather Advisory January 19, 04:30am until January 19, 12:00pm
    Cold Weather Advisory January 19, 04:30am until January 19, 12:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: -4 °F

    Isolated Snow
    Showers and
    Patchy
    Blowing Snow

  • M.L.King Day

    M.L.King Day: Isolated snow showers before 7am, then scattered flurries between 7am and 8am.  Patchy blowing snow before 3pm. Partly sunny and cold, with a high near 4. Wind chill values between -15 and -25. Windy, with a west wind 15 to 25 mph, with gusts as high as 40 mph.  Chance of precipitation is 20%.

    High: 4 °F

    Isolated Snow
    Showers and
    Patchy
    Blowing Snow

  • Monday Night

    Monday Night: Partly cloudy, with a low around -3. Wind chill values between -10 and -15. West wind 5 to 15 mph.

    Low: -3 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 16. Wind chill values between -5 and -15. West wind 5 to 10 mph becoming south in the afternoon.

    High: 16 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow.  Low around 9. South wind around 5 mph.  Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 9 °F

    Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow, mainly before noon.  Mostly cloudy, with a high near 25. West wind 5 to 15 mph.

    High: 25 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow before midnight.  Mostly cloudy, with a low around 5. West wind 10 to 15 mph.

    Low: 5 °F

    Chance Snow
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 15. West wind 10 to 15 mph.

    High: 15 °F

    Mostly Sunny

Detailed Forecast

Overnight
Isolated snow showers. Patchy blowing snow. Mostly cloudy, with a low around -4. Wind chill values between -20 and -25. Windy, with a west wind around 25 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
M.L.King Day
Isolated snow showers before 7am, then scattered flurries between 7am and 8am. Patchy blowing snow before 3pm. Partly sunny and cold, with a high near 4. Wind chill values between -15 and -25. Windy, with a west wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around -3. Wind chill values between -10 and -15. West wind 5 to 15 mph.
Tuesday
Increasing clouds, with a high near 16. Wind chill values between -5 and -15. West wind 5 to 10 mph becoming south in the afternoon.
Tuesday Night
Snow. Low around 9. South wind around 5 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Wednesday
A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 25. West wind 5 to 15 mph.
Wednesday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 5. West wind 10 to 15 mph.
Thursday
Mostly sunny, with a high near 15. West wind 10 to 15 mph.
Thursday Night
Mostly cloudy, with a low around -7.
Friday
Mostly sunny and cold, with a high near -1.
Friday Night
Partly cloudy, with a low around -19.
Saturday
Mostly sunny and cold, with a high near 0.
Saturday Night
A 20 percent chance of snow. Partly cloudy, with a low around -12.
Sunday
A 20 percent chance of snow. Mostly sunny and cold, with a high near 10.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Janesville WI
 42.63°N 89.04°W (Elev. 804 ft)
4:22 am CST Jan 19, 2026
4am CST Jan 19, 2026-6pm CST Jan 25, 2026
 
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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