Sometimes the biggest factor is... the weather. Sometimes the biggest factor will be the weather man's forecast if he scares them into staying home....no matter what the weather actually turns out to be.
For many customers at the strike of midnight on October 31st a large , heavy guillotine blade may as well fall, cutting off anyone's further intrest in things Halloween, scary or Halloween-Like, til next year.
When I had the only haunt open after Oct. 31st, most of my custumoers were other haunters (Some drove 4 hours to get here) and it was a good business they gave me too!
I had a November many years ago that was very good, the weather played a large part in this. Some October fans would want me to be open Dec. 25th and /or New Years Eve, but then they never show up, too cold, bad weather, whatever?
Northwestern Illinois gets cold (or used to)and the State of Illinois does buy larger trucks for this part of the State just so they can plow all that snow better, up and down these hills!