If you really want to figure out the mood of your story, go to booktrack.com and create a booktrack for a chapter or two of your story. I did it for a piece I wrote a while back and found the process easy, fun, and enlightening. Creating the booktrack allowed me to laser in on the mood of my story in a way I never imagined possible.
Think about it: When you listen to a movie soundtrack, you instantly get a sense of the story’s mood, no matter where you’re at in the score. Having never attempted a formal mood analysis before, I was surprised when I went back through my short story and found that the music and sounds I’d chosen fit the mood of the words in the story.
For the most part, my mood changes fell on scene breaks, which was good because each scene focused on building a single mood to good effect. However, when I hit the climax of the story, I had to shift the mood mid scene. Being forced to put music to the words really brought that out for me.
Anyway, my point is this: if you want to do a mood analysis of your story, try creating a booktrack. You’ll be pleasantly surprised at what you discover.