Switch will flip from 50s-60's to 70s-80's last week in May. Memorial day weekend marks the general period we start to have summer like pleasant weather. That lasts about 3 weeks till late June when 1st heat waves usually show up.Heat backs off and turns pleasant again in September. Then first true fall cold front comes around third week of September as a reminder that summer is on its last legs. Nice fall temps till around Halloween then the inevitable decline into the predominant 40s or lower from Nov till the following April.