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.

Partly Cloudy

90°F

32°C

Humidity 55%
Wind Speed SE 6 mph
Barometer 30.01 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 2 Jul 2:45 pm CDT
Extended Forecast for

Roscoe IL

Extreme Heat Warning July 2, 03:46pm until July 3, 12:00am
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 2, 03:46pm until July 3, 12:00am

    NOW until 12:00am Fri

    Extreme Heat Warning

  • This Afternoon

    High: 93 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly after 7pm. Mostly cloudy, with a low around 71. Southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 50%.

    Low: 71 °F

    Scattered
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely, mainly between 3pm and 5pm. Partly sunny, with a high near 88. Heat index values as high as 95. Southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 88 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. Southwest wind around 5 mph becoming calm in the evening. Winds could gust as high as 10 mph. Chance of precipitation is 70%.

    Low: 69 °F

    Chance
    T-storms then
    Showers
    Likely

  • Independence Day

    Independence Day: Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 84. East southeast wind 5 to 10 mph becoming south southwest in the afternoon. Chance of precipitation is 70%.

    High: 84 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.

    Low: 65 °F

    Chance
    T-storms then
    Showers
    Likely

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 30%.

    High: 82 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 102. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Scattered showers and thunderstorms, mainly after 7pm. Mostly cloudy, with a low around 71. Southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 50%.
Friday
Showers and thunderstorms likely, mainly between 3pm and 5pm. Partly sunny, with a high near 88. Heat index values as high as 95. Southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. Southwest wind around 5 mph becoming calm in the evening. Winds could gust as high as 10 mph. Chance of precipitation is 70%.
Independence Day
Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 84. East southeast wind 5 to 10 mph becoming south southwest in the afternoon. Chance of precipitation is 70%.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Roscoe IL
 42.41°N 88.99°W
Last Update:
3:17 pm CDT Jul 2, 2026
Forecast Valid:
3pm CDT Jul 2, 2026-6pm CDT Jul 8, 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