Arctic Front Brings Winter Weather and Colder Temperatures to the Eastern U.S.

A series of cold fronts will bring heavy lake effect snow to the northern Great Lakes. The fronts will merge over the Ohio Valley and bring colder temperatures east of the Mississippi River later today into the end of the week. Additionally, wintry weather will develop over the Ohio Valley, Appalachians, and Northeast as rain switches over to snow tonight into Thursday morning. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

21°F

-6°C

Humidity 54%
Wind Speed N 20 G 29 mph
Barometer 30.00 in
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill6°F (-14°C)
Last update 14 Jan 4:45 pm CST
Extended Forecast for

5 Miles SSW Janesville WI

  • Tonight

    Tonight: Partly cloudy, with a low around 11. Wind chill values between zero and 5. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 11 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow after 4pm.  Increasing clouds, with a high near 25. Wind chill values between zero and 10. Northwest wind 5 to 15 mph becoming southwest in the afternoon.

    High: 25 °F

    Sunny then
    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: Snow.  Low around 21. Southwest wind around 10 mph.  Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 21 °F

    Snow

  • Friday

    Friday: Snow likely, mainly before noon.  Mostly cloudy, with a high near 35. West wind 10 to 15 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Snow Likely

  • Friday Night

    Friday Night: A 40 percent chance of snow.  Mostly cloudy, with a low around 10. West wind 10 to 15 mph.

    Low: 10 °F

    Chance Snow

  • Saturday

    Saturday: A 30 percent chance of snow.  Mostly cloudy, with a high near 16. West wind around 15 mph.

    High: 16 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 3. West wind 10 to 15 mph.

    Low: 3 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after noon.  Partly sunny, with a high near 15. Southwest wind 10 to 15 mph.

    High: 15 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 2.

    Low: 2 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 11. Wind chill values between zero and 5. North wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
A 20 percent chance of snow after 4pm. Increasing clouds, with a high near 25. Wind chill values between zero and 10. Northwest wind 5 to 15 mph becoming southwest in the afternoon.
Thursday Night
Snow. Low around 21. Southwest wind around 10 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Friday
Snow likely, mainly before noon. Mostly cloudy, with a high near 35. West wind 10 to 15 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 10. West wind 10 to 15 mph.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 16. West wind around 15 mph.
Saturday Night
Mostly cloudy, with a low around 3. West wind 10 to 15 mph.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 15. Southwest wind 10 to 15 mph.
Sunday Night
Mostly cloudy, with a low around 2.
M.L.King Day
Partly sunny and cold, with a high near 10.
Monday Night
Partly cloudy, with a low around -1.
Tuesday
Mostly sunny, with a high near 15.
Tuesday Night
Mostly cloudy, with a low around 6.
Wednesday
Partly sunny, with a high near 21.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Janesville WI
 42.63°N 89.04°W (Elev. 804 ft)
3:13 pm CST Jan 14, 2026
4pm CST Jan 14, 2026-6pm CST Jan 21, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database