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

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

66°F

19°C

Humidity 49%
Wind Speed W 5 mph
Barometer 29.68 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 9 Mar 6:45 pm CDT
Extended Forecast for

Beloit WI

  • Tonight

    Tonight: Mostly clear, with a low around 43. Southwest wind around 5 mph becoming calm.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 52. Northeast wind 5 to 15 mph.

    High: 52 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Rain and thunderstorms before 1am, then rain likely and possibly a thunderstorm between 1am and 4am, then rain likely after 4am. Low around 35. North wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 35 °F

    Rain

  • Wednesday

    Wednesday: A chance of rain before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of snow after 1pm. Cloudy, with a high near 40. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.

    High: 40 °F

    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Northwest wind 5 to 10 mph.

    Low: 24 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Increasing clouds, with a high near 45. West wind 5 to 15 mph becoming southwest in the afternoon.

    High: 45 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Rain likely, mainly after 1am. Cloudy, with a low around 35. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Rain Likely
    and Breezy

  • Friday

    Friday: Partly sunny, with a high near 46. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 46 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 43. Southwest wind around 5 mph becoming calm.
Tuesday
A 30 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 52. Northeast wind 5 to 15 mph.
Tuesday Night
Rain and thunderstorms before 1am, then rain likely and possibly a thunderstorm between 1am and 4am, then rain likely after 4am. Low around 35. North wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A chance of rain before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of snow after 1pm. Cloudy, with a high near 40. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Northwest wind 5 to 10 mph.
Thursday
Increasing clouds, with a high near 45. West wind 5 to 15 mph becoming southwest in the afternoon.
Thursday Night
Rain likely, mainly after 1am. Cloudy, with a low around 35. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Partly sunny, with a high near 46. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 28.
Saturday
A 30 percent chance of snow before 1pm. Cloudy, with a high near 43.
Saturday Night
Rain and snow likely. Cloudy, with a low around 32. Chance of precipitation is 60%.
Sunday
Rain and snow likely. Cloudy, with a high near 41. Breezy. Chance of precipitation is 70%.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 16.
Monday
Mostly cloudy, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Beloit WI
 42.52°N 89.02°W (Elev. 745 ft)
Last Update:
5:57 pm CDT Mar 9, 2026
Forecast Valid:
7pm CDT Mar 9, 2026-6pm CDT Mar 16, 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