What's the weather like in San Francisco in October?San Francisco’s in the state of California on the east coast of the United States and has relatively mild weather all year round. Temperatures cool down a bit in October and the amount of rain starts to pick up but you'll still get plenty of sun at this time. There’s often fog in San Francisco because of Pacific winds, although it’s most likely to be over summer. There’s high hills in the centre of San Francisco that mean there’s different amounts of rain across the city, and you'll usually be a bit warmer bay side compared to ocean side.
AveragesThe average high in October is 21ºC, so it’s still nice and warm. Things can get a bit chilly in the evenings which cool to 12ºC. The sea temperature’s 14ºC, while humidity’s low. There’s 35mm of rain over four days, and you can expect 11 hours of daylight with eight hours of sunshine each day. UV levels will be moderate. The sun goes down just before 7pm at the start of the month.