Anyone who’s ever experienced San Francisco’s frigid, un-California-like summer will take comfort in this saying, supposedly uttered by the Huckleberry Finn author and one-time San Francisco resident. But did he ever really say it? I checked in with Jacques Lamarre, director of communications at the Mark Twain House & Museum in New York, who was unable to find any attribution of the quote to Twain. “This does not mean that he didn't say it, because he wrote so many letters, speeches, short stories, and novels,” Jacques says. “Sometimes he would say things conversationally that would be reported or re-quoted by others.” But in the absence of any definitive proof, the story of Mark Twain’s clever remark on the summer in San Francisco is about as probable as a heat wave in July.