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.

Partly Cloudy

30°F

-1°C

Humidity 55%
Wind Speed NE 6 mph
Barometer 30.50 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 1 Mar 11:45 am CST
Extended Forecast for

Roscoe IL

  • This Afternoon

    This Afternoon: Increasing clouds, with a high near 34. East northeast wind around 5 mph.

    High: 34 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 21. East southeast wind 5 to 10 mph.

    Low: 21 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 44. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 44 °F

    Sunny

  • Monday Night

    Monday Night: Scattered showers, mainly after 3am. Mostly cloudy, with a low around 31. East southeast wind around 5 mph. Chance of precipitation is 30%.

    Low: 31 °F

    Mostly Cloudy
    then
    Scattered
    Showers

  • Tuesday

    Tuesday: Showers likely, mainly before noon. Mostly cloudy, with a high near 44. East wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 60%.

    High: 44 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then a chance of showers after midnight. Mostly cloudy, with a low around 34. Chance of precipitation is 40%.

    Low: 34 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 48. Chance of precipitation is 50%.

    High: 48 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after midnight. Cloudy, with a low around 39.

    Low: 39 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers. Mostly cloudy, with a high near 55.

    High: 55 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Increasing clouds, with a high near 34. East northeast wind around 5 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 21. East southeast wind 5 to 10 mph.
Monday
Sunny, with a high near 44. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Monday Night
Scattered showers, mainly after 3am. Mostly cloudy, with a low around 31. East southeast wind around 5 mph. Chance of precipitation is 30%.
Tuesday
Showers likely, mainly before noon. Mostly cloudy, with a high near 44. East wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 60%.
Tuesday Night
A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then a chance of showers after midnight. Mostly cloudy, with a low around 34. Chance of precipitation is 40%.
Wednesday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 48. Chance of precipitation is 50%.
Wednesday Night
Showers likely, mainly after midnight. Cloudy, with a low around 39.
Thursday
A chance of showers. Mostly cloudy, with a high near 55.
Thursday Night
A chance of showers after midnight. Mostly cloudy, with a low around 41.
Friday
Showers. Mostly cloudy, with a high near 66.
Friday Night
Showers likely. Mostly cloudy, with a low around 36.
Saturday
Partly sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.43°N 89.02°W
Last Update:
12:21 pm CST Mar 1, 2026
Forecast Valid:
12pm CST Mar 1, 2026-6pm CST Mar 7, 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