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.

Fair

77°F

25°C

Humidity 89%
Wind Speed SE 6 mph
Barometer 29.94 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 3 Sep 9:55 pm CDT
Extended Forecast for

Rockton IL

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 73. South southeast wind around 5 mph, with gusts as high as 10 mph.

    Low: 73 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 10am. Mostly sunny, with a high near 91. Heat index values as high as 98. East wind 5 to 10 mph becoming west southwest in the afternoon.

    High: 91 °F

    Chance
    T-storms then
    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm.

    Low: 67 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 85. Light northeast wind increasing to 5 to 10 mph in the morning.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61. East northeast wind 5 to 10 mph becoming light after midnight.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 61.

    Low: 61 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 73. South southeast wind around 5 mph, with gusts as high as 10 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 10am. Mostly sunny, with a high near 91. Heat index values as high as 98. East wind 5 to 10 mph becoming west southwest in the afternoon.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm.
Saturday
Mostly sunny, with a high near 85. Light northeast wind increasing to 5 to 10 mph in the morning.
Saturday Night
Partly cloudy, with a low around 61. East northeast wind 5 to 10 mph becoming light after midnight.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 58.
Labor Day
Mostly sunny, with a high near 81.
Monday Night
Mostly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 69.
Wednesday
Partly sunny, with a high near 87.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 64.
Thursday
Mostly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockton IL
 42.43°N 89.05°W
Last Update:
9:21 pm CDT Sep 3, 2026
Forecast Valid:
10pm CDT Sep 3, 2026-6pm CDT Sep 10, 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