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.

Mostly Cloudy and Breezy

68°F

20°C

Humidity 73%
Wind Speed SW 21 G 30 mph
Barometer 29.87 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 12 Apr 10:45 am CDT
Extended Forecast for

Rockton IL

  • Today

    Today: Showers likely and possibly a thunderstorm, mainly after 4pm. Cloudy, with a high near 71. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Showers
    Likely and
    Breezy

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 10pm, then scattered showers between 10pm and midnight. Low around 60. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Showers and
    Breezy then
    Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 76. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 76 °F

    Cloudy then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 7pm. 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 slight chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 79. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 79 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Low around 59. Chance of precipitation is 80%.

    Low: 59 °F

    T-storms then
    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers and thunderstorms likely after 7am. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.

    High: 74 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 56.

    Low: 56 °F

    T-storms
    Likely

  • Thursday

    Thursday: A chance of showers. Mostly sunny, with a high near 74.

    High: 74 °F

    Chance
    Showers

Detailed Forecast

Today
Showers likely and possibly a thunderstorm, mainly after 4pm. Cloudy, with a high near 71. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 10pm, then scattered showers between 10pm and midnight. Low around 60. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation 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 76. 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 7pm. Mostly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 25 mph.
Tuesday
A slight chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 79. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Low around 59. Chance of precipitation is 80%.
Wednesday
A chance of showers, then showers and thunderstorms likely after 7am. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Wednesday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 56.
Thursday
A chance of showers. Mostly sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 55.
Friday
A chance of showers. Partly sunny, with a high near 79.
Friday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 52.
Saturday
A chance of showers. Partly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rockton IL
 42.45°N 89.05°W
Last Update:
10:41 am CDT Apr 12, 2026
Forecast Valid:
11am CDT Apr 12, 2026-6pm CDT Apr 18, 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