To my ears, jazz sounds better in warm weather and after the sun has gone down. While I will listen to some of my favorite jazz records in cooler weather, it's the warmer nights that really make them come alive. Something about those sounds and the heat of the night really makes it happen for me.
I do feel songwriting is a bit of its own creature and the writerliness of it. . . it's freeing. It's good for people who have an innate resistance to any restrictions whatsoever.