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.

Overcast

16°F

-9°C

Humidity 67%
Wind Speed NW 18 G 25 mph
Barometer 29.84 in
Dewpoint 7°F (-14°C)
Visibility 7.00 mi
Wind Chill0°F (-18°C)
Last update 18 Jan 11:55 pm CST
Extended Forecast for

4 Miles WNW Beloit WI

Winter Weather Advisory January 19, 12:16am until January 19, 12:00pm
Cold Weather Advisory January 19, 03:00am until January 19, 12:00pm
Click here for hazard details and duration
Winter Weather Advisory
Cold Weather Advisory
  •  
    Winter Weather Advisory January 19, 12:16am until January 19, 12:00pm

    NOW until 12:00pm Mon

    Winter Weather Advisory

  • Overnight

    Low: -3 °F

    Slight Chance
    Snow and
    Areas Blowing
    Snow

  • M.L.King Day

    M.L.King Day: Areas of blowing snow before noon. Mostly sunny and cold, with a high near 5. Wind chill values between -15 and -25. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 5 °F

    Areas Blowing
    Snow and
    Blustery then
    Partly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around -3. Wind chill values between -10 and -15. West wind 5 to 15 mph.

    Low: -3 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, 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

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow likely, mainly after midnight.  Mostly cloudy, with a temperature rising to around 20 by 4am. South wind 5 to 10 mph.  Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Low: 13 °F

    Snow Likely

  • Wednesday

    Wednesday: A 20 percent chance of snow.  Mostly cloudy, with a high near 23. West wind 10 to 15 mph.

    High: 23 °F

    Slight Chance
    Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow before midnight.  Mostly cloudy, with a low around 4. West wind 10 to 15 mph.

    Low: 4 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 14. West wind 10 to 15 mph.

    High: 14 °F

    Mostly Sunny

Detailed Forecast

Overnight
A 20 percent chance of snow before 4am. Areas of blowing snow. Mostly cloudy, with a low around -3. Wind chill values between -15 and -25. Windy, with a northwest wind 20 to 25 mph, with gusts as high as 40 mph.
M.L.King Day
Areas of blowing snow before noon. Mostly sunny and cold, with a high near 5. 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
Mostly cloudy, then gradually becoming mostly clear, with a low around -3. Wind chill values between -10 and -15. West wind 5 to 15 mph.
Tuesday
Mostly sunny, 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 likely, mainly after midnight. Mostly cloudy, with a temperature rising to around 20 by 4am. South wind 5 to 10 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Wednesday
A 20 percent chance of snow. Mostly cloudy, with a high near 23. West wind 10 to 15 mph.
Wednesday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 4. West wind 10 to 15 mph.
Thursday
Mostly sunny, with a high near 14. West wind 10 to 15 mph.
Thursday Night
Mostly cloudy, with a low around 0.
Friday
A 20 percent chance of snow. Partly sunny, with a high near 12.
Friday Night
A 20 percent chance of snow. Partly cloudy, with a low around -7.
Saturday
A 20 percent chance of snow. Partly sunny and cold, with a high near 4.
Saturday Night
A 30 percent chance of snow. Mostly cloudy, with a low around -10.
Sunday
A 20 percent chance of snow. Partly sunny and cold, with a high near 6.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Beloit WI
 42.54°N 89.1°W (Elev. 889 ft)
10:57 pm CST Jan 18, 2026
12am 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