Gameplay Realism lacks any rainy Weather so far since 0.55, as far as i remember noticing this. It doesn't have to rain every 5 Minutes for me, but a little bad Weather now and then would make Sense for collecting Rain Jackets or other waterproof Gear / Uniform.

I don't know if this can be set on/off in Server Options, but i have been wondering for months now, where all the Chernarus Waterdrops have gone.