October in San Francisco averages a daily high of 21°C with nights around 12.6°C. Expect roughly 3.6 wet days totalling 26.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit San Francisco is June–October.
Based on SAN FRANCISCO DOWNTOWN, CA US (0.8km), 1995–2024. 29 years of October data.