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.

Fair

41°F

5°C

Humidity 36%
Wind Speed NE 13 mph
Barometer 30.44 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 23 Mar 12:45 pm CDT
Extended Forecast for

Roscoe IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 45. North wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 45 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 28. East northeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.

    Low: 28 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 51. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 51 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37. South southeast wind around 5 mph, with gusts as high as 15 mph.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 64. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 64 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers after 1pm. Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 45. North wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 28. East northeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.
Tuesday
Partly sunny, with a high near 51. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
Mostly cloudy, with a low around 37. South southeast wind around 5 mph, with gusts as high as 15 mph.
Wednesday
Partly sunny, with a high near 64. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
A 40 percent chance of showers after 1pm. Partly sunny, with a high near 71.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Mostly sunny, with a high near 42.
Friday Night
Mostly clear, with a low around 25.
Saturday
Sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
Partly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.43°N 88.99°W
Last Update:
12:36 pm CDT Mar 23, 2026
Forecast Valid:
1pm CDT Mar 23, 2026-6pm CDT Mar 29, 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