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.

Fair

16°F

-9°C

Humidity 67%
Wind Speed N 10 mph
Barometer 29.96 in
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 2 Jan 8:45 am CST
Extended Forecast for

5 Miles SW Fort Atkinson WI

  • Today

    Today: Mostly sunny, with a high near 22. Northwest wind around 5 mph.

    High: 22 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 14. North wind around 5 mph.

    Low: 14 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 24. Calm wind becoming west around 5 mph in the afternoon.

    High: 24 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 8. West wind around 5 mph becoming calm after midnight.

    Low: 8 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 27. Calm wind becoming south around 5 mph in the afternoon.

    High: 27 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A 40 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 22. South wind 5 to 10 mph.

    Low: 22 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

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

    High: 39 °F

    Mostly 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 41.

    High: 41 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 22. Northwest wind around 5 mph.
Tonight
Mostly cloudy, with a low around 14. North wind around 5 mph.
Saturday
Mostly cloudy, with a high near 24. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 8. West wind around 5 mph becoming calm after midnight.
Sunday
Increasing clouds, with a high near 27. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
A 40 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 22. South wind 5 to 10 mph.
Monday
Mostly 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 41.
Tuesday Night
Mostly cloudy, with a low around 26.
Wednesday
Partly sunny, with a high near 40.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Fort Atkinson WI
 42.88°N 88.9°W (Elev. 814 ft)
Last Update:
7:36 am CST Jan 2, 2026
Forecast Valid:
9am CST Jan 2, 2026-6pm CST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation