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 73%
Wind Speed NW 5 mph
Barometer 29.89 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill12°F (-11°C)
Last update 1 Jan 10:30 pm CST
Extended Forecast for

3 Miles NNW Afton WI

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 11. West wind around 5 mph.

    Low: 11 °F

    Decreasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 21. Wind chill values between zero and 10. Northwest wind around 5 mph.

    High: 21 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 13. Northwest wind around 5 mph becoming calm.

    Low: 13 °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 10. West wind around 5 mph becoming calm after midnight.

    Low: 10 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 27. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 27 °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 40. Southwest wind 5 to 10 mph.

    High: 40 °F

    Partly Sunny

  • Monday Night

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

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 11. West wind around 5 mph.
Friday
Mostly sunny, with a high near 21. Wind chill values between zero and 10. Northwest wind around 5 mph.
Friday Night
Mostly cloudy, with a low around 13. 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 10. West wind around 5 mph becoming calm after midnight.
Sunday
Increasing clouds, with a high near 27. 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 40. Southwest wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 30.
Tuesday
Mostly cloudy, with a high near 42.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Partly cloudy, with a low around 29.
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 NNW Afton WI
 42.74°N 89.12°W (Elev. 948 ft)
Last Update:
10:41 pm CST Jan 1, 2026
Forecast Valid:
10pm CST Jan 1, 2026-6pm CST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation