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.

Partly Cloudy

32°F

0°C

Humidity 69%
Wind Speed SW 8 mph
Barometer 30.11 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 12 Jan 9:45 am CST
Extended Forecast for

5 Miles SW Fort Atkinson WI

  • Today

    Today: Sunny, with a high near 43. Southwest wind 10 to 15 mph.

    High: 43 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 32. Southwest wind 10 to 15 mph.

    Low: 32 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain. Partly sunny, with a high near 45. West wind around 15 mph.

    High: 45 °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 28. Blustery, with a north wind around 20 mph, with gusts as high as 30 mph.

    High: 28 °F

    Chance Snow
    and Blustery

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 10. Blustery, with a north wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 10 °F

    Mostly Cloudy
    and Blustery
    then 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 43. Southwest wind 10 to 15 mph.
Tonight
A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 32. Southwest wind 10 to 15 mph.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 45. 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 28. Blustery, with a north wind around 20 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 10. Blustery, with a north wind 10 to 20 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 19.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 3.
Sunday
Partly sunny, with a high near 16.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Fort Atkinson WI
 42.88°N 88.9°W (Elev. 814 ft)
Last Update:
7:37 am CST Jan 12, 2026
Forecast Valid:
10am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation