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

73°F

23°C

Humidity 94%
Wind Speed E 18 mph
Barometer 30.00 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 4 Sep 8:45 am CDT
Extended Forecast for

Capron IL

Heat Advisory September 4, 09:44am until September 4, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 4, 09:44am until September 4, 10:00pm

    NOW until 10:00pm Fri

    Heat Advisory

  • Today

    High: 91 °F

    Chance
    T-storms then
    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 11pm and 4am. Mostly cloudy, then gradually becoming mostly clear, with a low around 70. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 84. Light northeast wind becoming north northeast 5 to 10 mph in the morning.

    High: 84 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy during the early evening, then becoming mostly clear, with a low around 63. Northeast wind 5 to 10 mph becoming light east northeast after midnight.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 81. Calm wind becoming east around 5 mph in the morning. Winds could gust as high as 10 mph.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61.

    Low: 61 °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 63.

    Low: 63 °F

    Mostly Cloudy

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly before 10am. Mostly sunny, with a high near 91. Heat index values as high as 103. Northeast wind 5 to 10 mph becoming southwest in the afternoon.
Tonight
A slight chance of showers and thunderstorms between 11pm and 4am. Mostly cloudy, then gradually becoming mostly clear, with a low around 70. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 84. Light northeast wind becoming north northeast 5 to 10 mph in the morning.
Saturday Night
Mostly cloudy during the early evening, then becoming mostly clear, with a low around 63. Northeast wind 5 to 10 mph becoming light east northeast after midnight.
Sunday
Mostly sunny, with a high near 81. Calm wind becoming east around 5 mph in the morning. Winds could gust as high as 10 mph.
Sunday Night
Partly cloudy, with a low around 61.
Labor Day
Mostly sunny, with a high near 81.
Monday Night
Mostly cloudy, with a low around 63.
Tuesday
Partly sunny, with a high near 83.
Tuesday Night
A chance of showers after 1am. Mostly cloudy, with a low around 70.
Wednesday
Partly sunny, with a high near 86.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 66.
Thursday
Partly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Capron IL
 42.4°N 88.73°W
Last Update:
9:36 am CDT Sep 4, 2026
Forecast Valid:
9am CDT Sep 4, 2026-6pm CDT Sep 10, 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