Wait, weather isn't the same for all players who join the game? Wtf is that?
That is seriously the most retarded thing I've ever heard of in CRPG. This should be main priority above all other balance, bug, or gameplay issues.
It's kinda the same, but afaik it's based on when you load the map. If people go from one map to another together they carry over the same weather, and the weather will stay that same way throughout the map rotation if you don't leave.
But if you leave the map and rejoin or someone joins halfway in, it's possible they will see a sunny day when the weather shows as rainy for others.
I do think the same effects occur (ie you'll still take speed/crossbow penalties if the map is raining, regardless of if you see it as sunny or not), but yeah, pretty lame.