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

45°F

7°C

Humidity 57%
Wind Speed SW 10 mph
Barometer 30.02 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 12 Jan 3:45 pm CST
Extended Forecast for

Beloit WI

  • Tonight

    Tonight: Increasing clouds, with a low around 33. Southwest wind 5 to 10 mph.

    Low: 33 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 47. West wind around 15 mph, with gusts as high as 25 mph.

    High: 47 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22. West wind 10 to 15 mph.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 29. Blustery, with a north wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 29 °F

    Blustery.
    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 5 to 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 5 to 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 70%.

    High: 31 °F

    Snow Likely

  • Friday Night

    Friday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Chance Snow

Detailed Forecast

Tonight
Increasing clouds, with a low around 33. Southwest wind 5 to 10 mph.
Tuesday
Partly sunny, with a high near 47. West wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 22. West wind 10 to 15 mph.
Wednesday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 29. Blustery, with a north wind 15 to 20 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 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. Cloudy, with a high near 31. Southwest wind 10 to 15 mph becoming west in the afternoon. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 13.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 17.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 3.
Sunday
Partly sunny, with a high near 15.
Sunday Night
Mostly cloudy, with a low around 4.
M.L.King Day
Partly sunny, with a high near 18.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Beloit WI
 42.52°N 89.02°W (Elev. 745 ft)
Last Update:
3:13 pm CST Jan 12, 2026
Forecast Valid:
4pm CST Jan 12, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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