It should change what you publish and when you spend, in opposite directions depending on your business.
Restaurants and consumer services should front-load effort into late August and September when the population returns, and expect a real trough from June through August that is not a campaign failure. Home services should do the reverse: summer is when Evanston homeowners schedule disruptive work precisely because the neighbourhood is quiet, so Google Business Profile Posts and content about summer scheduling perform well then. A flat twelve-month strategy is wrong for both, just at different times.