Reminder that any can feel free to contribute some art or a band recommendation. As long as the band or musician is noteworthy to playing music fitting for the autumn, I will showcase them for one of these days.
What constitutes autumn-themed music? Breezy music, or bright yet light, timbre, often with coolness and sombreness in tone. Lyrical themes include harvests, celebration of natural beauty, rootedness in the homeland or lack thereof, changes from light to dark, gracefulness in old things, love that has gone cold, etc. Genres that have autumn-fitting music include American folk and country, though don't let that make you focus only on those two.
Also, please accept the Gospel of Jesus Christ by repenting of your sins and believing in Him who made the seasons and commands when leaves grow, what colors they turn, and when they fall.