Rain nerfs ranged, but also movement speed I believe.
My only grief with the rain, is when there is no clouds above for it to come from. Infact, can we have more weather conditions, like utter blizzards, those end of summer rainstorms where you are being bruised by the weight water, and some modifier for sunny weather on desert maps so everyone in armour above 15 weight starts to gently cook if they dont find shade?