National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Partly Cloudy

18°F

-8°C

Humidity 73%
Wind Speed NW 10 mph
Barometer 29.89 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill6°F (-14°C)
Last update 2 Jan 4:50 am CST
Extended Forecast for

5 Miles SSW Janesville WI

  • Today

    Today: Mostly sunny, with a high near 23. Northwest wind 5 to 10 mph.

    High: 23 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 15. Northwest wind around 5 mph becoming calm in the evening.

    Low: 15 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 26. Calm wind becoming west around 5 mph in the afternoon.

    High: 26 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 9. West wind around 5 mph becoming calm in the evening.

    Low: 9 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 28. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 28 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 23. South wind around 10 mph.

    Low: 23 °F

    Chance Snow
    then Partly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 39. Southwest wind 5 to 10 mph.

    High: 39 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm.

    Low: 29 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Partly sunny, with a high near 42.

    High: 42 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 23. Northwest wind 5 to 10 mph.
Tonight
Mostly cloudy, with a low around 15. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Mostly cloudy, with a high near 26. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 9. West wind around 5 mph becoming calm in the evening.
Sunday
Increasing clouds, with a high near 28. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Sunday Night
A 30 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 23. South wind around 10 mph.
Monday
Partly sunny, with a high near 39. Southwest wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm.
Tuesday
A 20 percent chance of rain after noon. Partly sunny, with a high near 42.
Tuesday Night
Mostly cloudy, with a low around 26.
Wednesday
Partly sunny, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 47.
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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:
4:47 am CST Jan 2, 2026
Forecast Valid:
5am CST Jan 2, 2026-6pm CST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation