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.

Fair

37°F

3°C

Humidity 75%
Wind Speed SW 10 mph
Barometer 30.02 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 12 Jan 4:45 pm CST
Extended Forecast for

4 Miles WNW Beloit WI

  • Tonight

    Tonight: Increasing clouds, with a low around 33. Southwest wind 5 to 15 mph.

    Low: 33 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 46. West wind around 15 mph, with gusts as high as 25 mph.

    High: 46 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 21. Blustery, with a west wind 10 to 20 mph, with gusts as high as 25 mph.

    Low: 21 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Blustery

  • Wednesday

    Wednesday: A 20 percent chance of snow before noon. Partly sunny, with a high near 28. Windy, with a north wind 20 to 25 mph, with gusts as high as 30 mph.

    High: 28 °F

    Windy. Slight
    Chance Snow
    then Partly
    Sunny

  • Wednesday Night

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

    Low: 11 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 25. Northwest wind around 10 mph becoming southwest in the afternoon.

    High: 25 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 19 °F

    Snow Likely

  • Friday

    Friday: Snow likely. Cloudy, with a high near 31. Southwest wind 10 to 15 mph becoming west in the afternoon. Chance of precipitation is 60%.

    High: 31 °F

    Snow Likely

  • Friday Night

    Friday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 12.

    Low: 12 °F

    Chance Snow

Detailed Forecast

Tonight
Increasing clouds, with a low around 33. Southwest wind 5 to 15 mph.
Tuesday
Partly sunny, with a high near 46. West wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 21. Blustery, with a west wind 10 to 20 mph, with gusts as high as 25 mph.
Wednesday
A 20 percent chance of snow before noon. Partly sunny, with a high near 28. Windy, with a north wind 20 to 25 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 11. North wind 10 to 15 mph.
Thursday
Mostly sunny, with a high near 25. Northwest wind around 10 mph becoming southwest in the afternoon.
Thursday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 19. South wind around 10 mph. Chance of precipitation is 60%.
Friday
Snow likely. Cloudy, with a high near 31. Southwest wind 10 to 15 mph becoming west in the afternoon. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 12.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 16.
Saturday Night
Mostly cloudy, with a low around 2.
Sunday
Partly sunny, with a high near 14.
Sunday Night
Mostly cloudy, with a low around 3.
M.L.King Day
Partly sunny, with a high near 17.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Beloit WI
 42.54°N 89.1°W (Elev. 889 ft)
Last Update:
3:13 pm CST Jan 12, 2026
Forecast Valid:
5pm CST Jan 12, 2026-6pm CST Jan 19, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation