Why Does It Smell Like Skunk in the Fall?
Short answer
Because early fall is when skunks look for a sheltered place to spend the winter, and spaces under porches and damaged foundations are what they look for.
What NYSDEC says
NYSDEC links strong early fall skunk odor to gaps around the house and dogs roaming at night. The fix is to close or screen holes and crawl spaces and keep dogs confined.
Skunks do not hibernate, so a den under a porch can stay active through the winter.
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Sources
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