I have a theory regarding seasons and the possible R/S remakes (idk if it's been mentioned but so what), anyway...
So the games begin in whatever is the opposing season (and that the seasons are set before playing and then can be altered afterwards), so you begin off in Summer in Sapphire, then as the storyline progresses, you go through Autumn (as your surroundings change from Summer into Autumn) then when you reach Winter by the time you get up to facing Kyogre (which would make the rain more believable/stand out more or something), after that, you go into Spring, where you start off the rest of your journey and it changes monthly (like in B/W) and it's opposite in Ruby. Because really, the seasons could be hinting at R/S remakes due to it tying in with the storyline in that way.