It gets a bit bland when the only weather is always bright cloudless setting, or slightly foggy. I hope you can add weather conditions that happen randomly during a match from.
Stormy - large rainfall making it hard to see with where the ground becomes muddy. Tanks have it hard going up hills has they slide back down
Snow - I think the Russian maps should use this the most. The cold makes you regain stamina had only 1/3 speed.
Sand storm - heavy that you become impossible to see past 5 meters only vague outlines. The storm also cause artillery shots to be 5 decrees off from where the wind is blowing against it.
Night - a condition where the sky looses its brightness to only about 20% of daytime. A special condition where gun fire is brighter from above so planes can see where players are shooting from to aim at them.
