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

46°F

8°C

Humidity 87%
Wind Speed Calm
Barometer 29.76 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 26 Mar 2:30 am CDT
Extended Forecast for

Beloit WI

  • Overnight

    Overnight: Partly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3pm. High near 65. Light east wind becoming northeast 10 to 15 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Mostly Sunny
    then Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 27. Northeast wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 27 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 44. Northwest wind 10 to 15 mph.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 23. Northwest wind 5 to 10 mph becoming light after midnight.

    Low: 23 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 48. Light west wind becoming southwest 10 to 15 mph in the morning.

    High: 48 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36. South wind around 10 mph.

    Low: 36 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 62. South wind 10 to 15 mph.

    High: 62 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 49. Calm wind.
Thursday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3pm. High near 65. Light east wind becoming northeast 10 to 15 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 30 percent chance of showers, mainly before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 27. Northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Friday
Mostly sunny, with a high near 44. Northwest wind 10 to 15 mph.
Friday Night
Mostly clear, with a low around 23. Northwest wind 5 to 10 mph becoming light after midnight.
Saturday
Sunny, with a high near 48. Light west wind becoming southwest 10 to 15 mph in the morning.
Saturday Night
Partly cloudy, with a low around 36. South wind around 10 mph.
Sunday
Mostly sunny, with a high near 62. South wind 10 to 15 mph.
Sunday Night
Partly cloudy, with a low around 46.
Monday
A 20 percent chance of rain and thunderstorms after 1pm. Mostly sunny, with a high near 70.
Monday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 45.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 62.
Tuesday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 49.
Wednesday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 67.
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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:
2:32 am CDT Mar 26, 2026
Forecast Valid:
2am CDT Mar 26, 2026-6pm CDT Apr 1, 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