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

57°F

14°C

Humidity 63%
Wind Speed Calm
Barometer 29.57 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 22 Mar 2:35 am CDT
Extended Forecast for

Beloit WI

  • Overnight

    Overnight: Partly cloudy, with a low around 44. West wind 5 to 10 mph becoming northeast.

    Low: 44 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of sprinkles with a slight chance of rain before 3pm, then a chance of sprinkles between 3pm and 4pm. Mostly cloudy, with a temperature falling to around 43 by 2pm. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 47 °F⇓

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 26. North wind 5 to 15 mph.

    Low: 26 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 46. North wind around 5 mph.

    High: 46 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 30. Calm wind becoming southeast around 5 mph in the evening.

    Low: 30 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 55. South wind 5 to 10 mph.

    High: 55 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. Southeast wind around 5 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 57. Southeast wind 5 to 10 mph.

    High: 57 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 44. West wind 5 to 10 mph becoming northeast.
Sunday
A chance of sprinkles with a slight chance of rain before 3pm, then a chance of sprinkles between 3pm and 4pm. Mostly cloudy, with a temperature falling to around 43 by 2pm. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 26. North wind 5 to 15 mph.
Monday
Sunny, with a high near 46. North wind around 5 mph.
Monday Night
Mostly cloudy, with a low around 30. Calm wind becoming southeast around 5 mph in the evening.
Tuesday
Mostly cloudy, with a high near 55. South wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 40. Southeast wind around 5 mph.
Wednesday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 57. Southeast wind 5 to 10 mph.
Wednesday Night
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 44.
Thursday
A 20 percent chance of rain. Partly sunny, with a high near 64.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 44.
Friday Night
Mostly clear, with a low around 26.
Saturday
Sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Beloit WI
 42.52°N 89.02°W (Elev. 745 ft)
Last Update:
2:32 am CDT Mar 22, 2026
Forecast Valid:
2am CDT Mar 22, 2026-6pm CDT Mar 28, 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