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

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fog

N/A

Humidity NA
Wind Speed Calm
Barometer 30.44 in
Dewpoint N/A
Visibility 0.15 mi
Last update 1 Dec 3:35 am CST
Extended Forecast for

Roscoe IL

Winter Weather Advisory December 1, 02:00pm until December 2, 12:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 6. Calm wind.

    Low: 6 °F

    Patchy Fog

  • Monday

    Monday: Snow, mainly after 2pm. High near 27. Calm wind becoming south southwest around 5 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    High: 27 °F

    Cloudy then
    Snow

  • Monday Night

    Monday Night: Snow, mainly before 10pm. Low around 11. Calm wind becoming west northwest around 5 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.

    Low: 11 °F

    Snow then
    Slight Chance
    Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 23. West northwest wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 23 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 15. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 15 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of snow. Cloudy, with a high near 31.

    High: 31 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow before midnight. Partly cloudy, with a low around -6.

    Low: -6 °F

    Slight Chance
    Snow then
    Mostly Clear

  • Thursday

    Thursday: Sunny and cold, with a high near 10.

    High: 10 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -7.

    Low: -7 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 6. Calm wind.
Monday
Snow, mainly after 2pm. High near 27. Calm wind becoming south southwest around 5 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Monday Night
Snow, mainly before 10pm. Low around 11. Calm wind becoming west northwest around 5 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
Tuesday
Partly sunny, with a high near 23. West northwest wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Mostly cloudy, with a low around 15. South southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
A 50 percent chance of snow. Cloudy, with a high near 31.
Wednesday Night
A 20 percent chance of snow before midnight. Partly cloudy, with a low around -6.
Thursday
Sunny and cold, with a high near 10.
Thursday Night
Partly cloudy, with a low around -7.
Friday
Partly sunny, with a high near 21.
Friday Night
Mostly cloudy, with a low around 13.
Saturday
Mostly cloudy, with a high near 28.
Saturday Night
Mostly cloudy, with a low around 13.
Sunday
Mostly cloudy, with a high near 24.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.43°N 88.99°W
Last Update:
3:35 am CST Dec 1, 2025
Forecast Valid:
3am CST Dec 1, 2025-6pm CST Dec 7, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation