With snow it's pretty hard to move around, so it would affect the movement speed and evasion.
Blizzard is the stronger snow, so the MS and evasion will get even worse, and the coldness is so great that it would even hurt. Yet Galeoth is pretty familiar with this weather.
With fog it's really difficult to see anything, so it would affect the accuracy.
Rain is pretty refreshing, but if you move around recklessly you will fall, so it would affect the movement speed.|optional: it would give a regen buff too|
Storm would be like the rain, just that the movement speed would be even worse|and with no regen buff|, but i think Fradz would like it.
Clear, in other words, no clouds in the sky or fog, so it's a pretty much normal weather.
Sunny, yeah, who doesn't like the sun...okay, undead doesn't like the sun, but it's a awesome weather in many ways. You fell more excited, ready to make your wishes come true, so the movement speed and attack speed is increased. Besides that, Phodom really fells homesick and lonely when he remembers about his slaughtered family, his happy moments working as a farmer besides his beloved one, with the sun watching them...but this is what make him strong.
Of course, i was kind of emotional when making the last one
, but these ones are just examples.