National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Light Rain

70°F

21°C

Humidity 78%
Wind Speed SW 14 G 22 mph
Barometer 29.78 in
Dewpoint 63°F (17°C)
Visibility 6.00 mi
Last update 12 Apr 4:45 pm CDT
Extended Forecast for

Roscoe IL

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm. Cloudy, with a steady temperature around 69. Breezy, with a south southwest wind around 20 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Showers
    Likely and
    Breezy

  • Tonight

    Tonight: Showers and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 1am. Low around 60. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Showers and
    Breezy then
    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 75. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 75 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 80 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms. Low around 59. Chance of precipitation is 80%.

    Low: 59 °F

    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms. High near 72. Chance of precipitation is 80%.

    High: 72 °F

    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Showers
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm. Cloudy, with a steady temperature around 69. Breezy, with a south southwest wind around 20 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 1am. Low around 60. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 75. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 25 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Southwest wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Showers and thunderstorms. Low around 59. Chance of precipitation is 80%.
Wednesday
Showers and thunderstorms. High near 72. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 55.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 81.
Friday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 52.
Saturday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 63.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 55.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.41°N 88.99°W
Last Update:
3:36 pm CDT Apr 12, 2026
Forecast Valid:
5pm CDT Apr 12, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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