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

63°F

17°C

Humidity 56%
Wind Speed SW 7 mph
Barometer 29.60 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 21 Mar 9:15 pm CDT
Extended Forecast for

5 Miles SSW Janesville WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 44. Southwest wind 5 to 10 mph becoming northeast after midnight.

    Low: 44 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of sprinkles between 11am and 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 46. Northeast wind around 15 mph.

    High: 46 °F

    Chance
    Sprinkles

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27. North wind 5 to 15 mph.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 47. North wind around 5 mph.

    High: 47 °F

    Sunny

  • Monday Night

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

    Low: 30 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54. South wind 5 to 10 mph.

    High: 54 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37. Southeast wind 5 to 10 mph.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 56. Southeast wind around 10 mph.

    High: 56 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 44. Southwest wind 5 to 10 mph becoming northeast after midnight.
Sunday
A chance of sprinkles between 11am and 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 46. Northeast wind around 15 mph.
Sunday Night
Partly cloudy, with a low around 27. North wind 5 to 15 mph.
Monday
Sunny, with a high near 47. North wind around 5 mph.
Monday Night
Increasing clouds, with a low around 30. Calm wind becoming southeast around 5 mph in the evening.
Tuesday
Mostly cloudy, with a high near 54. South wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 37. Southeast wind 5 to 10 mph.
Wednesday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 56. Southeast wind around 10 mph.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
A 20 percent chance of rain before 1pm. Partly sunny, with a high near 59.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 44.
Friday Night
Mostly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Janesville WI
 42.63°N 89.04°W (Elev. 804 ft)
Last Update:
8:32 pm CDT Mar 21, 2026
Forecast Valid:
9pm CDT Mar 21, 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