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

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

61°F

16°C

Humidity 72%
Wind Speed SW 12 mph
Barometer 29.73 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 31 Mar 6:45 am CDT
Extended Forecast for

Beloit WI

  • Today

    Today: Showers and thunderstorms likely before 3pm, then showers and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Temperature rising to near 69 by noon, then falling to around 52 during the remainder of the day. South wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 69 °F⇓

    Chance
    T-storms then
    Showers

  • Tonight

    Tonight: Increasing clouds, with a low around 36. Northeast wind 5 to 10 mph.

    Low: 36 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A chance of showers, mainly between 1pm and 2pm, then a chance of rain after 2pm. Mostly cloudy, with a high near 42. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 42 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 36. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 36 °F

    Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 64. East wind around 15 mph becoming south in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 64 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm before 10pm, then rain likely between 10pm and 1am. Mostly cloudy, with a low around 43. West wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Rain Likely

  • Friday

    Friday: A 20 percent chance of rain after 1pm. Partly sunny, with a high near 64. West wind 5 to 10 mph becoming east in the afternoon.

    High: 64 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Low around 45. East wind around 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 45 °F

    Chance
    T-storms then
    Rain

  • Saturday

    Saturday: Rain likely. Mostly cloudy, with a high near 60. Breezy. Chance of precipitation is 70%.

    High: 60 °F

    Rain Likely
    and Breezy

Detailed Forecast

Today
Showers and thunderstorms likely before 3pm, then showers and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Temperature rising to near 69 by noon, then falling to around 52 during the remainder of the day. South wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Increasing clouds, with a low around 36. Northeast wind 5 to 10 mph.
Wednesday
A chance of showers, mainly between 1pm and 2pm, then a chance of rain after 2pm. Mostly cloudy, with a high near 42. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 36. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Thursday
Rain and possibly a thunderstorm. High near 64. East wind around 15 mph becoming south in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Rain likely and possibly a thunderstorm before 10pm, then rain likely between 10pm and 1am. Mostly cloudy, with a low around 43. West wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 20 percent chance of rain after 1pm. Partly sunny, with a high near 64. West wind 5 to 10 mph becoming east in the afternoon.
Friday Night
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Low around 45. East wind around 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Rain likely. Mostly cloudy, with a high near 60. Breezy. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of rain, mainly before 1am. Mostly cloudy, with a low around 35.
Sunday
Partly sunny, with a high near 47.
Sunday Night
Partly cloudy, with a low around 29.
Monday
Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Beloit WI
 42.52°N 89.02°W (Elev. 745 ft)
Last Update:
7:34 am CDT Mar 31, 2026
Forecast Valid:
7am CDT Mar 31, 2026-6pm CDT Apr 6, 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