Sheboygan County Weather Watch for Monday, May 18: Patchy Fog, Storms, and Breezy Tuesday
Sheboygan County, WI — Monday, May 18, 2026
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7-Day Weather Forecast
The National Weather Service updated the Sheboygan County forecast at 4:31 a.m. Monday, May 18, and issued a 6:23 a.m. hazardous weather outlook for the Milwaukee/Sullivan area that includes Sheboygan County. The main window is Monday morning through Tuesday morning, with patchy fog, repeated thunderstorm chances, and breezy Tuesday winds.
Monday morning through Tuesday morning
For Monday, the county forecast calls for patchy fog before 8 a.m. and about a 50% chance of showers and thunderstorms. The hazardous weather outlook says scattered thunderstorms are expected Monday morning and again late Monday night. Hail and gusty winds are the main hazards.
Monday night into early Tuesday, the chance for showers and thunderstorms continues. Tuesday’s forecast keeps a 50% chance of rain showers and thunderstorms in the morning, then west winds of 15 to 20 mph with gusts near 35 mph.
For Sheboygan County residents, the practical takeaway is simple: give yourself extra time for early travel, keep an indoor backup ready for outdoor plans, and secure loose items before the stronger Tuesday breezes arrive. Check radar and local alerts if you’re heading out Monday night or early Tuesday.
