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

10°F

-12°C

Humidity 79%
Wind Speed NW 8 mph
Barometer 30.03 in
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Wind Chill-2°F (-19°C)
Last update 17 Mar 3:15 am CDT
Extended Forecast for

5 Miles SSW Janesville WI

  • Overnight

    Overnight: Partly cloudy, with a low around 1. Wind chill values between -5 and -10. Northwest wind 10 to 15 mph.

    Low: 1 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 22. Wind chill values between -5 and -15. Northwest wind around 10 mph becoming southwest in the afternoon.

    High: 22 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow, mainly before 5am. Low around 17. South wind 10 to 15 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.

    Low: 17 °F

    Snow

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 41. Southwest wind around 10 mph.

    High: 41 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 31. Southwest wind around 5 mph.

    Low: 31 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 45. South wind around 5 mph becoming north in the afternoon.

    High: 45 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. North wind around 5 mph becoming southwest after midnight.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 53. Southwest wind 5 to 10 mph.

    High: 53 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 1. Wind chill values between -5 and -10. Northwest wind 10 to 15 mph.
Tuesday
Increasing clouds, with a high near 22. Wind chill values between -5 and -15. Northwest wind around 10 mph becoming southwest in the afternoon.
Tuesday Night
Snow, mainly before 5am. Low around 17. South wind 10 to 15 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
Wednesday
Mostly cloudy, with a high near 41. Southwest wind around 10 mph.
Wednesday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 31. Southwest wind around 5 mph.
Thursday
Mostly sunny, with a high near 45. South wind around 5 mph becoming north in the afternoon.
Thursday Night
Mostly cloudy, with a low around 33. North wind around 5 mph becoming southwest after midnight.
Friday
Mostly cloudy, with a high near 53. Southwest wind 5 to 10 mph.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 61.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Mostly cloudy, with a high near 53.
Sunday Night
Mostly cloudy, with a low around 28.
Monday
Mostly sunny, with a high near 43.
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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:
3:32 am CDT Mar 17, 2026
Forecast Valid:
3am CDT Mar 17, 2026-6pm CDT Mar 23, 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