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.

Overcast

50°F

10°C

Humidity 71%
Wind Speed S 5 mph
Barometer 30.01 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 9 Apr 3:30 am CDT
Extended Forecast for

Beloit WI

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm before 4am, then scattered showers. Mostly cloudy, with a low around 47. West wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers
    Likely

  • Thursday

    Thursday: Increasing clouds, with a high near 63. West wind around 10 mph.

    High: 63 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Showers, mainly after 8pm. Low around 43. West wind around 5 mph becoming northeast after midnight. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 43 °F

    Showers

  • Friday

    Friday: A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 57. North wind 5 to 10 mph.

    High: 57 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 34. North wind around 5 mph becoming calm in the evening.

    Low: 34 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers after 1pm. Increasing clouds, with a high near 58. Southeast wind 5 to 10 mph.

    High: 58 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Southeast wind 10 to 15 mph. Chance of precipitation is 50%.

    Low: 49 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 73. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.

    High: 73 °F

    Breezy.
    Slight Chance
    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 61. Chance of precipitation is 70%.

    Low: 61 °F

    Showers
    Likely

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 4am, then scattered showers. Mostly cloudy, with a low around 47. West wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Increasing clouds, with a high near 63. West wind around 10 mph.
Thursday Night
Showers, mainly after 8pm. Low around 43. West wind around 5 mph becoming northeast after midnight. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Friday
A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 57. North wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 34. North wind around 5 mph becoming calm in the evening.
Saturday
A 20 percent chance of showers after 1pm. Increasing clouds, with a high near 58. Southeast wind 5 to 10 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Southeast wind 10 to 15 mph. Chance of precipitation is 50%.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 73. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
Sunday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 61. Chance of precipitation is 70%.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 30%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Tuesday
Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 48. Chance of precipitation is 80%.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Beloit WI
 42.52°N 89.05°W (Elev. 751 ft)
Last Update:
3:32 am CDT Apr 9, 2026
Forecast Valid:
3am CDT Apr 9, 2026-6pm CDT Apr 15, 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