Season's in Summoner's Rift
Not too much to write about but with the idea of bringing snow to the rift maybe you could keep the trend going with the other just as relevant seasons.
Maybe it could depend on the server on when the seasons/weather changes such as fall being different for NA and EUnordic More colorful in the fall, snow in the winter, how it is now in the spring and maybe also for the summer
I'm not sure if the texture changes would affect gameplay but just something i've thought about for a while; nothing major 