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

50°F

10°C

Humidity 76%
Wind Speed NW 5 mph
Barometer 29.88 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 13 May 3:55 am CDT
Extended Forecast for

Roscoe IL

  • Today

    Today: Partly sunny, with a high near 63. North northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 63 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. North wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.

    Low: 39 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 70. Calm wind becoming south around 5 mph in the afternoon.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers after 1am. Increasing clouds, with a low around 50. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 50 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 79. South southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 79 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 55. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 56.

    Low: 56 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Partly sunny, with a high near 63. North northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 39. North wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 70. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
A 50 percent chance of showers after 1am. Increasing clouds, with a low around 50. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 79. South southwest wind around 15 mph, with gusts as high as 25 mph.
Friday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 55. Chance of precipitation is 20%.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.
Saturday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 56.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Breezy.
Monday Night
Showers likely. Mostly cloudy, with a low around 58.
Tuesday
A chance of showers. Partly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.43°N 88.99°W
Last Update:
3:26 am CDT May 13, 2026
Forecast Valid:
4am CDT May 13, 2026-6pm CDT May 19, 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