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.

Mostly Cloudy

34°F

1°C

Humidity 87%
Wind Speed W 12 G 16 mph
Barometer 30.02 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 5 Apr 5:10 am CDT
Extended Forecast for

Roscoe IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 52. West northwest wind around 15 mph, with gusts as high as 25 mph.

    High: 52 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: A chance of showers between 10pm and 1am. Mostly cloudy, with a low around 35. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 35 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 46. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 25 mph.

    High: 46 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 22. North northeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 22 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 42. Northeast wind around 5 mph becoming south southeast in the afternoon. Winds could gust as high as 10 mph.

    High: 42 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain and snow showers before 4am, then a chance of rain showers. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.

    Low: 33 °F

    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 20 percent chance of showers. Partly sunny, with a high near 64. Breezy.

    High: 64 °F

    Slight Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 49. Breezy.

    Low: 49 °F

    Chance
    Showers and
    Breezy

  • Thursday

    Thursday: A chance of showers. Partly sunny, with a high near 64.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 52. West northwest wind around 15 mph, with gusts as high as 25 mph.
Tonight
A chance of showers between 10pm and 1am. Mostly cloudy, with a low around 35. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Monday
Partly sunny, with a high near 46. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 22. North northeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 42. Northeast wind around 5 mph becoming south southeast in the afternoon. Winds could gust as high as 10 mph.
Tuesday Night
A chance of rain and snow showers before 4am, then a chance of rain showers. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 64. Breezy.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 49. Breezy.
Thursday
A chance of showers. Partly sunny, with a high near 64.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 40.
Friday
A chance of showers. Mostly cloudy, with a high near 58.
Friday Night
A chance of showers. Mostly cloudy, with a low around 40.
Saturday
A chance of showers. Mostly cloudy, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.41°N 89.02°W
Last Update:
3:56 am CDT Apr 5, 2026
Forecast Valid:
5am CDT Apr 5, 2026-6pm CDT Apr 11, 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