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

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

36°F

2°C

Humidity 56%
Wind Speed W 13 G 22 mph
Barometer 29.49 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 24 Feb 5:45 pm CST
Extended Forecast for

Roscoe IL

  • Tonight

    Tonight: Scattered rain and snow showers, mainly before 7pm. Cloudy during the early evening, then gradual clearing, with a low around 21. West northwest wind 10 to 15 mph. Chance of precipitation is 30%.

    Low: 21 °F

    Scattered
    Rain/Snow
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 31. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 31 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18. West northwest wind around 5 mph becoming calm in the evening.

    Low: 18 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 40. South southeast wind 5 to 10 mph becoming southwest in the afternoon.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 25. Southwest wind around 5 mph, with gusts as high as 15 mph.

    Low: 25 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57. Breezy.

    High: 57 °F

    Sunny then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 36.

    High: 36 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Scattered rain and snow showers, mainly before 7pm. Cloudy during the early evening, then gradual clearing, with a low around 21. West northwest wind 10 to 15 mph. Chance of precipitation is 30%.
Wednesday
Sunny, with a high near 31. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 18. West northwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 40. South southeast wind 5 to 10 mph becoming southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 25. Southwest wind around 5 mph, with gusts as high as 15 mph.
Friday
Sunny, with a high near 57. Breezy.
Friday Night
Partly cloudy, with a low around 27.
Saturday
A chance of snow. Mostly cloudy, with a high near 36.
Saturday Night
Mostly cloudy, with a low around 16.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 18.
Monday
Partly sunny, with a high near 33.
Monday Night
Mostly cloudy, with a low around 22.
Tuesday
A chance of rain and snow. Partly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.41°N 89.02°W
Last Update:
6:01 pm CST Feb 24, 2026
Forecast Valid:
6pm CST Feb 24, 2026-6pm CST Mar 3, 2026
 
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