National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Great Lakes

Thunderstorms with strong wind gusts and hail will be possible today from Michigan into the Lower Great Lakes region. 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. Numerous daily record highs and warm lows are likely. Read More >

Hazardous Weather Conditions

Current conditions at

Juneau, Dodge County Airport (KUNU)

Lat: 43.43°NLon: 88.7°WElev: 935ft.

Mostly Cloudy

81°F

27°C

Humidity 77%
Wind Speed SW 14 G 22 mph
Barometer 29.81 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 21 Jun 9:10 am CDT
Extended Forecast for

Markesan WI

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

  • Today

    Today: Sunny and hot, with a high near 94. Heat index values as high as 102. Windy, with a southwest wind 20 to 25 mph, with gusts as high as 40 mph.

    High: 94 °F

    Hot and Windy

  • Tonight

    Tonight: Mostly clear, with a low around 78. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph.

    Low: 78 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 95. Heat index values as high as 103. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 95 °F

    Hot and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 78. Southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 78 °F

    Clear

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 92. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 92 °F

    Breezy. Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Northwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. North wind 5 to 10 mph becoming east in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 78. Chance of precipitation is 80%.

    High: 78 °F

    Showers

Detailed Forecast

Today
Sunny and hot, with a high near 94. Heat index values as high as 102. Windy, with a southwest wind 20 to 25 mph, with gusts as high as 40 mph.
Tonight
Mostly clear, with a low around 78. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph.
Sunday
Sunny and hot, with a high near 95. Heat index values as high as 103. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Clear, with a low around 78. Southwest wind around 15 mph, with gusts as high as 25 mph.
Monday
A 50 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 92. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Northwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. North wind 5 to 10 mph becoming east in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm. High near 78. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 81. Chance of precipitation is 80%.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Markesan WI
 43.71°N 89°W (Elev. 883 ft)
Last Update:
9:09 am CDT Jun 21, 2025
Forecast Valid:
9am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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