I think you got it wrong, you used it as a noun, which is actually brume.
Awwww, crap! Oh well, I tried.
Thanks for your correction Eliseth. Much appreciated. I'll try to think of something else.
[Edit] Ok I got a sentence for the thread. With some help. Thanks neko for your help.
"As dawn broke, I looked out my window over looking the Hydlaa Plaza and said to myself, "It looks like it's going to be a brumous morning.", and with that I went back to bed.
[Edit 2] Ok I have some more sentences that I have come up with on my own.
The brumous sky shifted and lowered baleful over the sere landscape.
The old crochety wizard glared out the crumbling tower window and muttered complaint to the brumous day.