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.

Light Rain

61°F

16°C

Humidity 77%
Wind Speed Calm
Barometer 29.74 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 31 Mar 3:50 am CDT
Extended Forecast for

4 Miles WNW Beloit WI

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Southwest wind around 15 mph.

    Low: 62 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and thunderstorms, mainly before 4pm. Temperature rising to near 70 by noon, then falling to around 52 during the remainder of the day. South wind around 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 70 °F⇓

    Chance
    T-storms then
    Showers

  • Tuesday Night

    Tuesday Night: A 10 percent chance of showers before 7pm. Mostly cloudy, with a low around 36. Northeast wind 10 to 15 mph.

    Low: 36 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain and snow showers before 7am, then a chance of rain. Mostly cloudy, with a high near 41. Breezy, with an east wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 41 °F

    Slight Chance
    Rain/Snow
    then Chance
    Rain and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 35. Breezy, with an east wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 35 °F

    Rain and
    Breezy

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 63. Breezy, with an east wind 15 to 20 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: 63 °F

    Rain and
    Breezy

  • 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 42. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 42 °F

    Rain Likely

  • Friday

    Friday: A 20 percent chance of rain after 1pm. Partly sunny, with a high near 63. West wind 5 to 10 mph becoming east in the afternoon.

    High: 63 °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. Chance of precipitation is 80%.

    Low: 45 °F

    Chance
    T-storms then
    Rain

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Southwest wind around 15 mph.
Tuesday
Showers and thunderstorms, mainly before 4pm. Temperature rising to near 70 by noon, then falling to around 52 during the remainder of the day. South wind around 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
A 10 percent chance of showers before 7pm. Mostly cloudy, with a low around 36. Northeast wind 10 to 15 mph.
Wednesday
A slight chance of rain and snow showers before 7am, then a chance of rain. Mostly cloudy, with a high near 41. Breezy, with an east wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 35. Breezy, with an east wind 15 to 20 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 63. Breezy, with an east wind 15 to 20 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 42. West wind 10 to 15 mph, with gusts as high as 25 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 63. 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. Chance of precipitation is 80%.
Saturday
Rain likely. Mostly cloudy, with a high near 59. Breezy. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 34.
Sunday
Partly sunny, with a high near 46.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Mostly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Beloit WI
 42.54°N 89.1°W (Elev. 889 ft)
Last Update:
3:34 am CDT Mar 31, 2026
Forecast Valid:
4am 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