Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

73°F

23°C

Humidity 78%
Wind Speed S 9 mph
Barometer 29.97 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 21 Aug 2:45 pm CDT
Extended Forecast for

3 Miles N Poplar Grove IL

Severe T-storm Watch until August 21, 10:00pm
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until August 21, 10:00pm

    NOW until 10:00pm Fri

    Severe T-storm Watch

  • This Afternoon

    High: 78 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 10pm. Some of the storms could be severe.  Mostly cloudy, with a low around 60. South southwest wind around 5 mph becoming northwest after midnight. Winds could gust as high as 10 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Severe
    Thunderstorms
    then Partly
    Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 75. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 75 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly after 5pm. Some of the storms could be severe. Mostly cloudy, with a high near 78. Southwest wind around 10 mph, with gusts as high as 15 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 thunderstorms likely, mainly before 10pm. Some of the storms could be severe. Mostly cloudy, with a low around 60. South southwest wind around 5 mph becoming northwest after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Sunny, with a high near 78. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 54. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Sunny, with a high near 75. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday Night
Mostly clear, with a low around 53.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
A chance of showers after 1am. Mostly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Poplar Grove IL
 42.4°N 88.82°W
3:01 pm CDT Aug 21, 2026
3pm CDT Aug 21, 2026-6pm CDT Aug 27, 2026
 
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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