Berkeley Weather in September

Berkeley's climate spans a dramatic range from foggy, cool flatlands to warm, sunny hill neighborhoods. The bay provides consistent marine cooling in the flatlands, while the Berkeley Hills create a rain shadow pattern and frequently sit above the fog layer. Mark Twain's famous quote 'The coldest winter I ever spent was a summer in San Francisco' could apply equally to Berkeley's bayside neighborhoods.

Excellent shoulder season — warm with fewer tourists in many destinations.