Here in New England Cape Cod specifically it goes from 56 on Monday, 90 and humid on Tuesday, 49 Wednesday and Thursday, 97 and humid as hell on Friday. Yea. Just wait 10 minutes as they say.
One "mod" I am happy I did was following Wayne Tripp's advice to use DEI - Radiator Relief in the cooling system. Warms up faster in winter and cools down better in summer.