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

32°F

0°C

Humidity 80%
Wind Speed Calm
Barometer 29.91 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 16 Feb 3:35 am CST
Extended Forecast for

5 Miles SSW Janesville WI

  • Overnight

    Overnight: Partly cloudy, with a low around 34. South wind 5 to 10 mph.

    Low: 34 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 63. West wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 37. Calm wind becoming east around 5 mph after midnight.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54. Southeast wind 5 to 15 mph.

    High: 54 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 47. Southeast wind around 15 mph becoming south after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Rain Likely

  • Wednesday

    Wednesday: A 20 percent chance of rain before noon. Sunny, with a high near 60. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 60 °F

    Breezy.
    Slight Chance
    Rain then
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 34. West wind 5 to 10 mph.

    Low: 34 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 53. West wind 5 to 15 mph becoming east in the morning.

    High: 53 °F

    Partly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain likely before midnight, then rain and snow likely. Mostly cloudy, with a low around 32. Chance of precipitation is 60%.

    Low: 32 °F

    Rain Likely
    then
    Rain/Snow
    Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 34. South wind 5 to 10 mph.
Washington's Birthday
Mostly sunny, with a high near 63. West wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 37. Calm wind becoming east around 5 mph after midnight.
Tuesday
Mostly cloudy, with a high near 54. Southeast wind 5 to 15 mph.
Tuesday Night
A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 47. Southeast wind around 15 mph becoming south after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 20 percent chance of rain before noon. Sunny, with a high near 60. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 34. West wind 5 to 10 mph.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 53. West wind 5 to 15 mph becoming east in the morning.
Thursday Night
Rain likely before midnight, then rain and snow likely. Mostly cloudy, with a low around 32. Chance of precipitation is 60%.
Friday
A chance of rain and snow before noon, then a chance of snow. Partly sunny, with a high near 39. Chance of precipitation is 40%.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 25.
Saturday
A 20 percent chance of snow. Partly sunny, with a high near 36.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 19.
Sunday
A 20 percent chance of snow. Mostly sunny, with a high near 29.
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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:
3:39 am CST Feb 16, 2026
Forecast Valid:
3am CST Feb 16, 2026-6pm CST Feb 22, 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