If this year's summer becomes the norm I think it may be a bit too hot for places like Sacramento. And all the places I lived in SV so far have had A/C so that hasn't been an issue. But what's great about being near the bay is that at night, most summer nights, it still cools down way below 20C so it's easy to simply keep doors/windows open after sunset and close them in the morning to have cool air inside the house, without an A/C, almost every day. There are exceptions of course like we had this summer where there were 2-3 days long heatwaves with no drop below 25C at night, A/C helped with that.