Ah, OK! I guess our terrain is generally speking so flat that we don't have that kind of weather effects. But the mountains of Norway and Sweden do. Well, UnReal World map doesn't have anything corresponding to Sweden and Norway, but I think I could still make it so that wind blowing from west will sometimes make the weather warmer. Also, in the winter wind from east means colder air, but in the summer it means warmer air. Thing like that are going to be implemented.

Considering Finnish weather, I guess large bodies of water affect the local terrain. In the autumn the inland air cools down faster, but coastal areas cool down slower. I don't yet know if I will simulate that in the first version of the weather engine.