This is both for my personal curiosity and for the benefit of the players ostensibly...so as i see these are the broad strokes of geography in Terra, im frankly too lazy to sort through all the different geography pages on the wiki.
Majatra- mostly arid/desert climate from Kafuristan west through Kalopia and Jakania and eastern Deltaria and northern and western Solentia. ive always imagined Cobura to be mountain-y and forest-y like the Caucus. Then running into Zardugal the mountains give way to plains and forests while northern Deltaria and most of Jelbania are flat plains with forests. Then a mix of forests and plains in northern Majatra with a more arid climate around Beithynu. No idea about Cildania or Selucia and Al'Badara would i imagine be arid/desert climate
Artania- i have no idea but i would imagine the usual European geography and climate of temperate forests and rolling plains with a smattering of mountains with an obviously colder climate up north.
Seleya- no clue
Dovani- too big to contemplate
Keris- tundra
Macon- slightly less tundra?
Squibble- jungles and maybe mountains? Very tropical i would imagine
Vascania- jungles and mountains like Squibble