Sadly, Twain never actually said the first thing that comes to ones mind about SF in the summer: https://www.snopes.com/fact-check/and-never-the-twain-shall-twe

Sadly, Twain never actually said the first thing that comes to ones mind about SF in the summer: https://www.snopes.com/fact-check/and-never-the-twain-shall-tweet/ https://www.snopes.com/fact-check/and-never-the-twain-shall-... But yeah, I eventually moved out of San Francisco because of exactly this: I missed real summertime.