Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

34°F

1°C

Humidity 81%
Wind Speed E 15 G 21 mph
Barometer 29.88 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 15 Mar 12:35 am CDT
Extended Forecast for

Janesville WI

Winter Storm Warning March 15, 07:00pm until March 16, 04:00pm
Click here for hazard details and duration
Winter Storm Warning
  • Overnight

    Overnight: A 30 percent chance of rain.  Cloudy, with a low around 32. East wind around 15 mph, with gusts as high as 35 mph.

    Low: 32 °F

    Chance Rain

  • Sunday

    Sunday: Rain and thunderstorms before 1pm, then rain between 1pm and 4pm, then rain and possibly a thunderstorm after 4pm.  High near 53. South wind around 15 mph, with gusts as high as 30 mph.  Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 53 °F

    Rain

  • Sunday Night

    Sunday Night: Rain, snow, and sleet before 9pm, then snow and sleet between 9pm and 10pm, then snow after 10pm. Some thunder is also possible.  Patchy blowing snow after 10pm. Low around 17. Windy, with a north wind 20 to 25 mph, with gusts as high as 45 mph.  Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 3 inches possible.

    Low: 17 °F

    Wintry Mix
    and Patchy
    Blowing Snow

  • Monday

    Monday: Snow likely, mainly before 1pm.  Areas of blowing snow. Cloudy, with a high near 21. Wind chill values between zero and 5. Windy, with a northwest wind 20 to 25 mph, with gusts as high as 45 mph.  Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    High: 21 °F

    Snow Likely
    and Areas
    Blowing Snow

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 5. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 5 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 24. Northwest wind 5 to 10 mph becoming southwest in the afternoon.

    High: 24 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow.  Low around 15. South wind 5 to 10 mph.  Chance of precipitation is 80%.

    Low: 15 °F

    Snow

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 42. Southwest wind 5 to 10 mph.

    High: 42 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of rain. Cloudy, with a low around 32. East wind around 15 mph, with gusts as high as 35 mph.
Sunday
Rain and thunderstorms before 1pm, then rain between 1pm and 4pm, then rain and possibly a thunderstorm after 4pm. High near 53. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Sunday Night
Rain, snow, and sleet before 9pm, then snow and sleet between 9pm and 10pm, then snow after 10pm. Some thunder is also possible. Patchy blowing snow after 10pm. Low around 17. Windy, with a north wind 20 to 25 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 3 inches possible.
Monday
Snow likely, mainly before 1pm. Areas of blowing snow. Cloudy, with a high near 21. Wind chill values between zero and 5. Windy, with a northwest wind 20 to 25 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 5. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 24. Northwest wind 5 to 10 mph becoming southwest in the afternoon.
Tuesday Night
Snow. Low around 15. South wind 5 to 10 mph. Chance of precipitation is 80%.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 42. Southwest wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Mostly cloudy, with a low around 33.
Friday
Partly sunny, with a high near 55.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Partly sunny, with a high near 57.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.67°N 89.04°W (Elev. 774 ft)
12:22 am CDT Mar 15, 2026
12am CDT Mar 15, 2026-6pm CDT Mar 21, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database