^What they said. I love the cool October air, the trees changing colors, leaves blowing everywhere, and that sense of mysticism that you can only get around Halloween.
Agreed. October is definitely my favorite month.
I suspect the smell of wood smoke and changing leaves has some effect. There's a sharp, crispness to the air that I think many people recognize and respond to by feeling like "it's time" for something. But I don't think it's necessarily Halloween exactly. It's something else, but I really can't pinpoint it.
March is another favorite month of mine.
Both of these are key transition months where I live--months where the air is cool but the sun is still warm. Because of this it's usually breezy/windy at these times of year and the freshness of the atmosphere makes me want to explore and travel.
"I took the one less traveled by,
And that has made all the difference."
Coincidentally, March and October also happen to be the longest months in terms of work or school here in the U.S. They are the only two months that don't have federally recognized holiday's that give you at least one day a month off from work/school.