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.

Overcast

10°F

-12°C

Humidity 61%
Wind Speed SW 6 mph
Barometer 30.07 in
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 5 Dec 1:15 am CST
Extended Forecast for

Roscoe IL

  • Overnight

    Overnight: Patchy freezing fog before 3am. Mostly cloudy, with a low around -3. Wind chill values as low as -10. South southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: -3 °F

    Patchy
    Freezing Fog

  • Friday

    Friday: Partly sunny, with a high near 28. Wind chill values as low as -5. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 28 °F

    Partly Sunny

  • Friday Night

    Friday Night: Patchy snow and freezing rain before midnight. Mostly cloudy, with a steady temperature around 25. South southwest wind around 10 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 25 °F

    Patchy Wintry
    Mix then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 25. Northwest wind around 5 mph becoming calm in the afternoon. Winds could gust as high as 15 mph.

    High: 25 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 12. Calm wind becoming northeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 60%.

    Low: 12 °F

    Chance Snow
    then Snow
    Likely

  • Sunday

    Sunday: A 30 percent chance of snow before noon. Partly sunny, with a high near 20.

    High: 20 °F

    Chance Snow
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -3.

    Low: -3 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 20.

    High: 20 °F

    Partly Sunny

  • Monday Night

    Monday Night: Snow likely. Mostly cloudy, with a low around 12.

    Low: 12 °F

    Snow Likely

Detailed Forecast

Overnight
Patchy freezing fog before 3am. Mostly cloudy, with a low around -3. Wind chill values as low as -10. South southwest wind around 10 mph, with gusts as high as 15 mph.
Friday
Partly sunny, with a high near 28. Wind chill values as low as -5. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Patchy snow and freezing rain before midnight. Mostly cloudy, with a steady temperature around 25. South southwest wind around 10 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 25. Northwest wind around 5 mph becoming calm in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 12. Calm wind becoming northeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 60%.
Sunday
A 30 percent chance of snow before noon. Partly sunny, with a high near 20.
Sunday Night
Partly cloudy, with a low around -3.
Monday
Partly sunny, with a high near 20.
Monday Night
Snow likely. Mostly cloudy, with a low around 12.
Tuesday
Mostly cloudy, with a high near 29.
Tuesday Night
Snow likely. Cloudy, with a low around 18.
Wednesday
Snow likely. Mostly cloudy, with a high near 31.
Wednesday Night
Mostly cloudy, with a low around 6.
Thursday
Partly sunny, with a high near 21.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.43°N 88.99°W
Last Update:
12:16 am CST Dec 5, 2025
Forecast Valid:
1am CST Dec 5, 2025-6pm CST Dec 11, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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