I don't know about the rest of the country, but it's A/C time in Florida. My benchmark for turning on the A/C is that the house is 80 degrees (or higher) when I get home from work. For the last three days we've been running it for several hours in the evening and at night (althought the thermostat is turned up to 78 then). We're also running the fan with it and off it goes when I get up in the morning. Soon enough the humidity will kick up to the hot, wet blanket stage and it will stay on daily. May through October is when it's on all the time. *sigh* But the good news is that it stayed off for six months and I've lasted longer than my neighbors in not turning it on. LOL
Thursday after next I'm getting my ducts resealed and next month we'll be getting more insulation put in. Fingers crossed that that helps keep the summer electric bill jump to more of a low jump.