Summer doesn’t officially end for another five days. But that hasn’t stopped Seattle Weekly

cover boy and forecasting rock star Cliff Mass from declaring that 2010 has been “the worst summer in three decades!”Hyperbole like that works better when you’ve got proof. Thankfully, Mass obliges: I asked UW staff member Neal Johnson to plot up the number of days equal to or greater than 70F from January 1 through September 15th for this year and all other years since 1948 (see below). The results?Die, you miserable graph.By this measure, 2010’s 55 days over 70 degrees makes it the worst summer since 1980. “No one younger than 35 can remember anything worse,” writes Mass. Yeah, and neither can anyone over 90. But for different reasons.