It's generally less than about 2% of Jun to Nov precipitation, but it happens. Map below from this article led by @prehistormic.bsky.social.
journals.ametsoc.org/view/journal...
Climatologist, statistician, and geographer | #FirstGen | UDel and UBC grad | Grower of food and lover of plants and birds | Partner of bsky.app/profile/teresarobeson.com