Weather is also relevant for a number S rank spawn conditions such as Laideronette (rain), The Garlok (no rain), Zona Seeker (clear/fair skies indirectly), Burfurlur (clear/fair skies), Kirlirger (fog).

There are some graphical effects, such as the ground and gear looking wet when it rains.

They have done it a bit for mechanics in certain duties. For example, the weather in Bismarck affects the mechanics (and since many players are unaware they get killed by it at random).

But more interactions would be welcome.