As you can tell by this insane heat wave we’re experiencing, everything and everyone slows down when the summer heats up. This goes for magazines as well, as July and August are typically pretty slow months for ad pages. As min reports, for August, 100 of the 152 monthly magazines they survey are experiencing declines in advertising.

However, like the cool blast of a store that leaves its door open, there are some monthlies that are feeling quite good. Power & Motoryacht (yes, that exists) is loving August – its upcoming issue features about 22 more ad pages than its August 2010 issue, making it the biggest gain among monthlies. Next up is Ladies’ Home Journal, which picked up about 19 more ad pages than last year.

For the rest of the top five, check out min’s report.