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.

Fair

37°F

3°C

Humidity 81%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 19 Mar 11:15 pm CDT
Extended Forecast for

Beloit WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. Calm wind becoming southwest around 5 mph after midnight.

    Low: 40 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 58. Southwest wind around 10 mph becoming north in the afternoon.

    High: 58 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 39. North wind around 5 mph becoming southeast after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 65. South wind 5 to 10 mph.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 48. Southwest wind 5 to 10 mph.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain. Mostly cloudy, with a high near 56. Northeast wind 10 to 15 mph.

    High: 56 °F

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 29. North wind 10 to 15 mph.

    Low: 29 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 47. North wind 5 to 10 mph.

    High: 47 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 32.

    Low: 32 °F

    Increasing
    Clouds

Detailed Forecast

Tonight
Mostly cloudy, with a low around 40. Calm wind becoming southwest around 5 mph after midnight.
Friday
Mostly cloudy, with a high near 58. Southwest wind around 10 mph becoming north in the afternoon.
Friday Night
Mostly cloudy, with a low around 39. North wind around 5 mph becoming southeast after midnight.
Saturday
Mostly sunny, with a high near 65. South wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 48. Southwest wind 5 to 10 mph.
Sunday
A 20 percent chance of rain. Mostly cloudy, with a high near 56. Northeast wind 10 to 15 mph.
Sunday Night
Mostly cloudy, with a low around 29. North wind 10 to 15 mph.
Monday
Mostly sunny, with a high near 47. North wind 5 to 10 mph.
Monday Night
Increasing clouds, with a low around 32.
Tuesday
Mostly cloudy, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 53.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 40.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 59.
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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:
11:22 pm CDT Mar 19, 2026
Forecast Valid:
11pm CDT Mar 19, 2026-6pm CDT Mar 26, 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