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

54°F

12°C

Humidity 67%
Wind Speed W 12 mph
Barometer 29.76 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 20 Mar 8:45 am CDT
Extended Forecast for

Beloit WI

  • Today

    Today: Mostly cloudy, with a high near 63. West wind 5 to 10 mph becoming north in the afternoon.

    High: 63 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. North wind around 5 mph becoming east after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68. Southeast wind 5 to 15 mph becoming southwest in the afternoon.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 49. Southwest wind 5 to 10 mph becoming west after midnight.

    Low: 49 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 50. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 50 °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 33. East wind around 5 mph becoming south after midnight.

    Low: 33 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly cloudy, with a high near 63. West wind 5 to 10 mph becoming north in the afternoon.
Tonight
Mostly cloudy, with a low around 39. North wind around 5 mph becoming east after midnight.
Saturday
Mostly sunny, with a high near 68. Southeast wind 5 to 15 mph becoming southwest in the afternoon.
Saturday Night
Increasing clouds, with a low around 49. Southwest wind 5 to 10 mph becoming west after midnight.
Sunday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 50. Northeast wind 10 to 15 mph, with gusts as high as 25 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 33. East wind around 5 mph becoming south after midnight.
Tuesday
Mostly cloudy, with a high near 54.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Partly sunny, with a high near 52.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
A 20 percent chance of rain. Mostly sunny, 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:
8:37 am CDT Mar 20, 2026
Forecast Valid:
9am CDT Mar 20, 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