Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast across parts of the Upper Midwest into the Great Lakes, the Northeast, and the central High Plains. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

81°F

27°C

Humidity	74%
Wind Speed	SW 10 mph
Barometer	29.95 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	85°F (29°C)
Last update	1 Jul 7:45 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

5 Miles SSW Janesville WI

Extreme Heat Warning July 1, 08:12am until July 1, 07:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning July 1, 08:12am until July 1, 07:00pm
NOW until 7:00pm Wed
Extreme Heat Warning
Today
High: 93 °F
Hot
Tonight
Low: 75 °F
Partly Cloudy
then Chance
Showers
Thursday
High: 90 °F
Chance
Showers then
Chance
T-storms
Thursday Night
Low: 70 °F
Chance
T-storms
Friday
High: 90 °F
Showers
Friday Night
Low: 70 °F
Showers
Likely
Independence Day
High: 85 °F
Chance
T-storms then
Showers
Likely
Saturday Night
Low: 66 °F
Showers
Likely

Detailed Forecast

Today

Sunny and hot, with a high near 93. Heat index values as high as 101. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Tonight

A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 75. Southwest wind 10 to 15 mph.

Thursday

A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 90. Heat index values as high as 99. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.

Thursday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind 5 to 10 mph.

Friday

Showers and possibly a thunderstorm. High near 90. Southwest wind 5 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Independence Day

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 30%.

Sunday Night

A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 64.

Monday

Mostly sunny, with a high near 86.

Monday Night

Partly cloudy, with a low around 64.

Tuesday

Mostly sunny, with a high near 87.