Saturday will be cooler & very nice as high pressure builds in from Canada.
Very warm and humid conditions arrive on Sunday & continue into Monday.
Chances for showers and storms arrive again along a cold front, which should be arriving Monday night and into Tuesday. Yes.....there is a chance of ran at Lambeau.
Behind that... fall temperatures take over as we drop into the 50s/60s as highs.
Summer officially wraps up on Wednesday, with the autumnal equinox.