The fact that they added the shows just using the wiki is enough proof to me they aren't putting the same care they would adding their own productions. Iron Fist S2 is clearly in the winter, not only due to the weather but the planning for the Chinese Spring Festival and I believe at one point a character even mentions it's winter. Also, Defenders has Fall/Winter like weather (at one point it snows), the events of Daredevil S2 are said to be last year (I know this is technically true with a May placement, but November fits it better) and everyone is wearing heavier clothing, which doesn't fit at all with May. I know weather can't always be trusted, but I do feel they film around the time they believe the show will be set. Especially when there aren't major contradictions in the shows themselves.