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

59°F

15°C

Humidity 59%
Wind Speed NW 3 mph
Barometer 29.57 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 22 Mar 12:55 am CDT
Extended Forecast for

5 Miles SSW Janesville WI

  • Overnight

    Overnight: Partly cloudy, with a low around 43. West wind 5 to 10 mph becoming northeast.

    Low: 43 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of sprinkles with a slight chance of rain before 9am, then a chance of sprinkles between 9am and 4pm. Mostly cloudy, with a temperature falling to around 42 by 5pm. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 46 °F⇓

    Slight Chance
    Rain then
    Mostly Cloudy

  • 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. Calm wind becoming north around 5 mph in the morning.

    High: 46 °F

    Sunny

  • Monday Night

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

    Low: 30 °F

    Mostly Cloudy

  • Tuesday

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

    High: 55 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. Southeast wind around 5 mph.

    Low: 39 °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: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 43. West wind 5 to 10 mph becoming northeast.
Sunday
A chance of sprinkles with a slight chance of rain before 9am, then a chance of sprinkles between 9am and 4pm. Mostly cloudy, with a temperature falling to around 42 by 5pm. 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. Calm wind becoming north around 5 mph in the morning.
Monday Night
Mostly cloudy, with a low around 30. Calm wind becoming south around 5 mph in the evening.
Tuesday
Mostly cloudy, with a high near 55. Southwest wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 39. Southeast wind around 5 mph.
Wednesday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 56. Southeast wind around 10 mph.
Wednesday Night
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 43.
Thursday
A 30 percent chance of rain, mainly before 1pm. Mostly cloudy, with a high near 63.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 43.
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:
5 Miles SSW Janesville WI
 42.63°N 89.04°W (Elev. 804 ft)
Last Update:
12:31 am CDT Mar 22, 2026
Forecast Valid:
1am CDT Mar 22, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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