Cloudy skies and very humid after overnight thunderstorms blew up south of Las Vegas. There is a chance of rain or thunderstorms for your Labor Day Monday, so watch the skies if you’re tending the BBQ grill or jumping in the pool to relax. The air will stay humid most of the week, but Sherry’s #WeatherNOW forecast says hot temps will also stick around to make it feel more uncomfortable this first week of September.