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

50°F

10°C

Humidity 54%
Wind Speed SW 14 mph
Barometer 29.69 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 9 Mar 2:15 am CDT
Extended Forecast for

Roscoe IL

  • Overnight

    Overnight: Mostly clear, with a low around 44. South southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 71. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 71 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46. West southwest wind around 5 mph becoming east northeast after midnight.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 59. East wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 59 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 34. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    Low: 34 °F

    Showers

  • Wednesday

    Wednesday: Rain likely, possibly mixed with snow before 4pm, then a chance of snow. Cloudy, with a high near 41. Breezy. Chance of precipitation is 60%.

    High: 41 °F

    Rain/Snow
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 35. Breezy.

    Low: 35 °F

    Rain Likely
    and Breezy

Detailed Forecast

Overnight
Mostly clear, with a low around 44. South southwest wind around 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 71. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 46. West southwest wind around 5 mph becoming east northeast after midnight.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 59. East wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Showers and possibly a thunderstorm. Low around 34. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Wednesday
Rain likely, possibly mixed with snow before 4pm, then a chance of snow. Cloudy, with a high near 41. Breezy. Chance of precipitation is 60%.
Wednesday Night
Mostly clear, with a low around 25.
Thursday
Mostly sunny, with a high near 45.
Thursday Night
Rain likely. Mostly cloudy, with a low around 35. Breezy.
Friday
Mostly sunny, with a high near 46. Breezy.
Friday Night
Mostly cloudy, with a low around 28.
Saturday
A chance of snow. Cloudy, with a high near 44.
Saturday Night
A chance of rain and snow. Cloudy, with a low around 32.
Sunday
Rain and snow likely. Cloudy, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.43°N 89.02°W
Last Update:
2:36 am CDT Mar 9, 2026
Forecast Valid:
2am CDT Mar 9, 2026-6pm CDT Mar 15, 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