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 >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Partly Cloudy

1°F

-17°C

Humidity 55%
Wind Speed W 18 G 24 mph
Barometer 30.22 in
Dewpoint -11°F (-24°C)
Visibility 10.00 mi
Wind Chill-20°F (-29°C)
Last update 19 Jan 11:45 am CST
Extended Forecast for

4 Miles WNW Beloit WI

  • M.L.King Day

    M.L.King Day: Patchy blowing snow before 3pm. Mostly sunny and cold, with a high near 4. Wind chill values between -15 and -20. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 4 °F

    Patchy
    Blowing Snow
    and Breezy

  • Tonight

    Tonight: 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 17. Wind chill values between -5 and -15. West wind 5 to 10 mph.

    High: 17 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow.  Low around 10. South wind around 5 mph becoming west after midnight.  Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 10 °F

    Snow

  • Wednesday

    Wednesday: A 20 percent chance of snow.  Mostly cloudy, with a high near 25. West wind 10 to 15 mph.

    High: 25 °F

    Slight Chance
    Snow

  • Wednesday Night

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

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -6. West wind 10 to 15 mph.

    Low: -6 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -1.

    High: -1 °F

    Cold

Detailed Forecast

M.L.King Day
Patchy blowing snow before 3pm. Mostly sunny and cold, with a high near 4. Wind chill values between -15 and -20. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.
Tonight
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 17. Wind chill values between -5 and -15. West wind 5 to 10 mph.
Tuesday Night
Snow. Low around 10. South wind around 5 mph becoming west after midnight. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Wednesday
A 20 percent chance of snow. Mostly cloudy, with a high near 25. West wind 10 to 15 mph.
Wednesday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 5. West wind around 15 mph.
Thursday
Mostly sunny, with a high near 15. West wind 10 to 15 mph.
Thursday Night
Mostly cloudy, with a low around -6. West wind 10 to 15 mph.
Friday
Mostly sunny and cold, with a high near -1.
Friday Night
Partly cloudy, with a low around -18.
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:
4 Miles WNW Beloit WI
 42.54°N 89.1°W (Elev. 889 ft)
12:08 pm CST Jan 19, 2026
12pm 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