Severe Thunderstorms in the Northern Plains and Upper Midwest; Critical Fire Weather in the West; Dangerous Heat in the Central and Eastern U.S.

Severe thunderstorms are likely today across the northern Plains and into the upper Mississippi Valley. Gusty winds and dry conditions will result in widespread critical fire weather through Saturday across parts of the Four Corners region and the Great Basin. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

73°F

23°C

Humidity 83%
Wind Speed S 12 G 16 mph
Barometer 29.82 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 21 Jun 2:50 am CDT
Extended Forecast for

4 Miles WNW Clinton WI

Heat Advisory June 21, 12:00pm until June 23, 07:00pm
Click here for hazard details and duration
Heat Advisory
  • Overnight

    Overnight: Partly cloudy, with a low around 74. South wind 10 to 15 mph.

    Low: 74 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny and hot, with a high near 95. Heat index values as high as 105. Windy, with a southwest wind 15 to 25 mph, with gusts as high as 40 mph.

    High: 95 °F

    Hot and Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph.

    Low: 76 °F

    Mostly Clear
    and Breezy
    then Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 94. Heat index values as high as 102. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 94 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 75. Southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Clear

  • Monday

    Monday: A 20 percent chance of showers after 1pm.  Sunny and hot, with a high near 94. Southwest wind around 15 mph.

    High: 94 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 70. Southwest wind 5 to 10 mph becoming northwest after midnight.

    Low: 70 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Partly sunny, with a high near 87. Northwest wind 5 to 10 mph becoming south in the afternoon.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 74. South wind 10 to 15 mph.
Saturday
Sunny and hot, with a high near 95. Heat index values as high as 105. Windy, with a southwest wind 15 to 25 mph, with gusts as high as 40 mph.
Saturday Night
Mostly clear, with a low around 76. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph.
Sunday
Sunny and hot, with a high near 94. Heat index values as high as 102. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Clear, with a low around 75. Southwest wind around 15 mph, with gusts as high as 25 mph.
Monday
A 20 percent chance of showers after 1pm. Sunny and hot, with a high near 94. Southwest wind around 15 mph.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70. Southwest wind 5 to 10 mph becoming northwest after midnight.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Northwest wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 88. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Clinton WI
 42.58°N 88.95°W (Elev. 817 ft)
1:24 am CDT Jun 21, 2025
3am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
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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