The southeast Wisconsin, Waukesha and Milwaukee forecast for the rest of your Saturday night will be fine. The only thing you might notice are those clouds on the increase. Overnight lows will drop to around 30.
A weak warm front will be close to our area tomorrow. That means two things. The first being the small chance of a little rain or a few snowflakes mainly to the west and the north. That means most of the day will be okay. Highs will top out around 50 for Milwaukee's temperature and lakefront communities and mid-50's for Waukesha's and inland temperatures.
With that front just to our north, I can't rule out the slight chance of a sprinkle or light shower Sunday night. Overnight lows will botton out in the low-40's.
Monday, a cool front will slowly be approaching the area. Most of the day should be okay, but I can't rule out a sprinkle or light shower. Highs will top out in the upper-50-'s for Milwaukee's temperature and lakefront communities before falling there and low-60's for Waukesha's and inland temperatures.
The steadier rain will be falling on Tuesday, though this will NOT be a flooding rain. Highs that day will be cooler with highs only in the mid-40's.
Wednesday and Thursday look dry with highs slowly creeping back up into the 50's. There will be small chances of rain then next weekend.