Next January, we get a "big" film (that doesn't really look like crap) Tak3n opening not on MLK Weekend.
February we are getting big films like Jupiter Ascending and Fifty Shades (the latter is guranteed to be big) also some "smaller" films that could also pull decent to big numbers such as Seventh Son, SpongeBob, and Secret Service.
April is looking like the "summer blockbuster preview month" where we get 1-2 big films that basically whet out appetite for the "official" summer season. This year it was Cap 2, next year it's Fast 7, 2016 has Huntsman and 2017 has Pacific Rim 2.
August (early to middle August at least) I think will become an extension of what July is now. Guardians and Turtles anyone...? 2015 has Fantastic 4, Goosebumps and Man From U.N.C.L.E. 2016 has a DC film and Spectral.
September can have 1-3 bigger hits. Usually there's a Sony Animated film, and an action film. September is also where the Maze Runner sequels are going, which can do 300+WW. Also 2015 has Hotel Transylvania 2 and Everest.
October: sure, it's Oscar bait month. But there are some hits, such as Gone Girl. We also have Fury coming up, and even to an extent, Dracula Untold (whether is does good numbers or not, studios are still willing to put a big budget tentpole here like Gravity last year). 2015 has St. James Place, Conjuring 2, Jungle Book etc.
Bottom line? I guess it's that is doesn't matter where a movie is scheduled. If it looks appealing, it can succeed in any month,