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

Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

28°F

-2°C

Humidity 74%
Wind Speed SW 8 mph
Barometer 30.10 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 12 Jan 8:45 am CST
Extended Forecast for

2 Miles NW Janesville WI

  • Today

    Today: Sunny, with a high near 44. Southwest wind 10 to 15 mph.

    High: 44 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 32. Southwest wind around 10 mph.

    Low: 32 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain. Partly sunny, with a high near 46. West wind around 15 mph.

    High: 46 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 23. West wind 10 to 15 mph.

    Low: 23 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of snow. Mostly cloudy, with a high near 29. Blustery, with a north wind around 20 mph, with gusts as high as 30 mph.

    High: 29 °F

    Chance Snow
    and Blustery

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 11. North wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 11 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 24. Northwest wind 5 to 10 mph becoming southwest in the afternoon.

    High: 24 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 19. South wind 5 to 10 mph. Chance of precipitation is 60%.

    Low: 19 °F

    Snow Likely

  • Friday

    Friday: Snow likely, mainly after noon. Mostly cloudy, with a high near 31. Chance of precipitation is 70%.

    High: 31 °F

    Snow Likely

Detailed Forecast

Today
Sunny, with a high near 44. Southwest wind 10 to 15 mph.
Tonight
A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 32. Southwest wind around 10 mph.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 46. West wind around 15 mph.
Tuesday Night
Mostly cloudy, with a low around 23. West wind 10 to 15 mph.
Wednesday
A 50 percent chance of snow. Mostly cloudy, with a high near 29. Blustery, with a north wind around 20 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 11. North wind 10 to 15 mph, with gusts as high as 30 mph.
Thursday
Mostly sunny, with a high near 24. Northwest wind 5 to 10 mph becoming southwest in the afternoon.
Thursday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 19. South wind 5 to 10 mph. Chance of precipitation is 60%.
Friday
Snow likely, mainly after noon. Mostly cloudy, with a high near 31. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 14.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 18.
Saturday Night
Mostly cloudy, with a low around 2.
Sunday
Partly sunny, with a high near 16.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Janesville WI
 42.71°N 89.03°W (Elev. 768 ft)
Last Update:
7:37 am CST Jan 12, 2026
Forecast Valid:
9am CST Jan 12, 2026-6pm CST Jan 18, 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