For moscow winter maps like Vysokovo, monastery add a powerful snow storm like in fortified district.
For other maps adding things like overcast, where there is no sun and is cloudy.
Adding light rain, where it would rain slightly (In Berlin already i think)
Adding heavy rain where it would rain heavily and strongly.
This would spice up the gameplay, and the look of the game
as long as the maps stay bright enough
the game really doesnt like dark areas for some reason
I like this idea 
Moscow doesnt feel like moscow yet, you dont really feel that its cold. most maps look like in the spring, where is the insanely cold snow? Where is the fog? Why cant i see my soldiers breath in the cold?
Berlin could use rainstorms
Yes, weather please, and lots of it.
Amen. Nice and easy way to add more maps to the rotation.
Every Map Should have these presets.
Moscow arent cold region.
But maybe winter are not winter.
you forgot fog, time to end the sniper camping