SEVERE THUNDERSTORM WATCH 563 REMAINS VALID UNTIL 2 PM CDT THIS AFTERNOON FOR THE FOLLOWING AREAS IN WISCONSIN THIS WATCH INCLUDES 9 COUNTIES IN SOUTH CENTRAL WISCONSIN DANE GREEN ROCK IN SOUTHEAST WISCONSIN JEFFERSON KENOSHA MILWAUKEE RACINE WALWORTH WAUKESHA THIS INCLUDES THE CITIES OF BELOIT, BRODHEAD, BROOKFIELD, DELAVAN, EAST TROY, ELKHORN, FORT ATKINSON, JANESVILLE, JEFFERSON, KENOSHA, LAKE GENEVA, MADISON, MENOMONEE FALLS, MILWAUKEE, MONROE, MUSKEGO, NEW BERLIN, RACINE, WATERTOWN, WAUKESHA, AND WHITEWATER.
Weather in Jefferson, WI
Updated 2026-08-11 12:00 local time · ZIP codes 53549

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THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 563 IN EFFECT UNTIL 2 PM CDT THIS AFTERNOON FOR THE FOLLOWING AREAS IN WISCONSIN THIS WATCH INCLUDES 12 COUNTIES IN SOUTH CENTRAL WISCONSIN DANE GREEN IOWA LAFAYETTE ROCK SAUK IN SOUTHEAST WISCONSIN JEFFERSON KENOSHA MILWAUKEE RACINE WALWORTH WAUKESHA THIS INCLUDES THE CITIES OF ARGYLE, BARABOO, BARNEVELD, BELMONT, BELOIT, BENTON, BLANCHARDVILLE, BRODHEAD, BROOKFIELD, DARLINGTON, DELAVAN, DODGEVILLE, EAST TROY, ELKHORN, FORT ATKINSON, JANESVILLE, JEFFERSON, KENOSHA, LAKE GENEVA, MADISON, MENOMONEE FALLS, MILWAUKEE, MINERAL POINT, MONROE, MUSKEGO, NEW BERLIN, PRAIRIE DU SAC, RACINE, REEDSBURG, SAUK CITY, SHULLSBURG, WATERTOWN, WAUKESHA, AND WHITEWATER.
Next hours
72°39% rain
77°40% rain
78°13% rain
83°6% rain
83°6% rain
83°6% rain
81°7% rain
78°9% rain
75°11% rain
74°12% rain
73°12% rain
72°13% rain3-day weather forecast



Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance reaches about 40% over the next 12 hours.
It feels like 76°F with winds near 4 mph.
75°F, 11% rain chance and 4 mph wind.
Visibility is around 10 mi; gusts may reach 12 mph.
Current temperature is 72°F, wind 4 mph, rain chance up to 40%.
UV index is 6. Sunscreen and sunglasses are sensible for longer outdoor time.
Jefferson weather today
Cloudy and 72°F in Jefferson, WI. Today's high is 83°F with a 78% rain chance. Winds are around 4 mph with gusts near 7 mph. Relative humidity is 100%, pressure is 29.91 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Jefferson
Sunrise is at 05:56 AM and sunset is at 08:03 PM. Tomorrow's forecast calls for Mist with a high near 83°F and a low near 67°F. The maximum rain chance is 63%.