I rummaged through my book shelves for the perfect entry and discovered that I don't read many books with such covers (except for winter books. I seem to have a decent number of those). But here's what I got:
Spring
Northanger Abbey by Jane Austen
Because it's a blooming garden!
Summer
Nights of Rain and Stars by Maeve Binchy
Because it's Greece and by the sea!
Fall
The Right Attitude to Rain by Alexander McCall Smith
Because it can rain a lot in the fall!
Winter
The Chronicles of Narnia by C.S. Lewis
Lots of snow and Lucy doesn't have a coat :( :( :(