Media / Jay Leno Worst Ratings Summer Ever for Jay Leno 'Tonight' host still beating Letterman, though By Evann Gastaldo, Newser Staff Posted Sep 3, 2010 10:59 AM CDT Copied Entertainer Jay Leno performs his standup comedy act using topical issues at the Beau Rivage Resort & Casino in Biloxi, Miss., Saturday, Aug. 21, 2010. (AP Photo/Rogelio V. Solis) Jay Leno is not having a good summer. In fact, he's having his worst summer ever, at least as far as Tonight Show ratings are concerned. This summer is actually the lowest-rated ever for the show—and even Conan O'Brien pulled in better numbers for the coveted 18-49 demographic last year than Leno is doing this year. Still, with an average of 3.8 million viewers, he's beating David Letterman, according to the Hollywood Reporter. (More Jay Leno stories.) Report an error