cobweb/comb footed spider

6300 Lives in the garage, only appeares in the summer, 2nd year appearance, what is the name of it? Is it poisonous? From Dundas, ON

Number 6300 This appears to be Steatoda triangulosa, a cobweb/comb footed spider (family Theridiidae) known as the triangulate household spider – Click here for more detailed information. Technically venomous (like the vast majority of true spiders it has venom glands), this species is harmless to humans, and may feed on more dangerous spiders such as black widows.