It never was clear for me. It starts in autumn, I presume, but Gaston has a t-shirt. Ok, he's robust and maybe he doesn't feel cold, but the meadows are still green. Then, there is the snow, so it's clearly winter, but when the spell was broken, the snow disappear. Moreover, Maurice passed all the winter in the forest? I really can't understand.

the entire movie seems to only take a few days. starts fall like, then snows, then rains. They could have been having crazy weather in France like we did in the NE with that PolarVortex.

^ Agree. I'd say... late November/early December!

i think it spans the entire year, starting off with autumn when she's on her own at his Dad's place, stays with beast through winter and change happens during spring

Autumn going to winter, I guess.