These are a few of my go to movies for October:

• Suspiria (1977)
• An American Werewolf in London (1981)
• Creepshow (1982)
• Twilight Zone: The Movie (1983)
• Demon Knight (1995)
• The Devil’s Advocate (1997)
• Lake Placid (1999)
• Sleepy Hollow (1999)
• The Ninth Gate (1999)
• Behind the Mask: The Rise of Leslie Vernon (2006)
• Trick R’ Treat (2007)
• The Innkeepers (2011)
• What We Do In The Shadows (2014)
• It Follows (2014)
• Tale of Tales (2015)
• The Witch (2015)
• The Autopsy of Jane Doe (2016)
• The Endless (2017)
• Get Out (2017)
• The Possession of Hannah Grace (2018)
• Suspiria (2018)
• Underwater (2020)
• Last Night in Soho (2021)
• The Menu (2022)

Side note: Tubi the free streaming service, often has many obscure horror movies, worth a look.