San Francisco weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Excellent
Best time to visit: April – October
What is the weather like in San Francisco in October?
In October, San Francisco is warm: daytime highs average 21 °C, and nights cool down to about 12 °C. The sea averages 13.9 °C – swimming is only for the hardy. The sun shines for around 9 hours a day. Rain is rare: about 3 days bring 23 mm in total. All in all, October is an excellent month for a holiday in San Francisco.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 100 | 99 | 82 |
| Day | 23° | 21° | 17° |
| Night | 13° | 12° | 9° |
| Sea | 15° | 14° | 13° |
| Sun | 10 h | 9 h | 7 h |
| Rain days | 1 | 3 | 6 |
More details for October
- Daylight
- 11 h 17 min07:17 – 18:34
- UV index
- 5 · moderateclear sky, noon (estimate)
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 14 km/haverage daily peak
- Cloud cover
- 39 %on average
- Hot days
- 1 day30 °C or more
- Time zone
- UTC−7America/Los_Angeles
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %95 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
San Francisco in October: quick answers
Is San Francisco hot in October?
Warm rather than hot: in October, daytime highs in San Francisco average 21 °C and nights cool to about 12 °C.
Can you swim in San Francisco in October?
Only if you don't mind cold water: in October the sea averages just 13.9 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in San Francisco in October?
Rain is rare: about 3 days bring 23 mm in total.
San Francisco month by month
The whole year in San FranciscoAll destinations: USA
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)