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.

Overcast

19°F

-7°C

Humidity 68%
Wind Speed NW 9 mph
Barometer 29.88 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 2 Jan 12:50 am CST
Extended Forecast for

3 Miles SW Fort Atkinson WI

  • Overnight

    Overnight: Mostly cloudy, with a low around 11. Calm wind becoming northwest around 5 mph.

    Low: 11 °F

    Mostly Cloudy

  • Friday

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

    High: 22 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 14. Northwest wind around 5 mph becoming calm.

    Low: 14 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 25. Calm wind becoming west around 5 mph in the afternoon.

    High: 25 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 9. West wind around 5 mph becoming calm.

    Low: 9 °F

    Partly Cloudy

  • 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 30 percent chance of snow, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 22. South wind 5 to 10 mph.

    Low: 22 °F

    Chance Snow

  • 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 30.

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 11. Calm wind becoming northwest around 5 mph.
Friday
Mostly sunny, with a high near 22. Northwest wind around 5 mph.
Friday Night
Mostly cloudy, with a low around 14. Northwest wind around 5 mph becoming calm.
Saturday
Mostly cloudy, with a high near 25. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 9. West wind around 5 mph becoming calm.
Sunday
Increasing clouds, with a high near 27. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
A 30 percent chance of snow, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 22. South wind 5 to 10 mph.
Monday
Partly sunny, with a high near 39. Southwest wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 30.
Tuesday
Mostly cloudy, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
Mostly sunny, with a high near 40.
Wednesday Night
Partly cloudy, with a low around 28.
Thursday
A 20 percent chance of rain. Partly sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Fort Atkinson WI
 42.9°N 88.9°W (Elev. 781 ft)
Last Update:
12:26 am CST Jan 2, 2026
Forecast Valid:
1am CST Jan 2, 2026-6pm CST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation