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September is one of the best months to visit San Francisco for the best beach weather. It has the most sunshine and best sunbathing and swimming conditions of the year.
The weather in September is slightly warmer than the previous month. September has average maximum temperatures of 23°C (74°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright.
September has total rainfall of 0.5cm (0.2inches) making it extremely dry with only very rare light showers. There are just 1.3 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between.
Sea temperatures are a cold 17°C (62°F). September is too cold for swimming in San Francisco for any length of time, unless you have a wetsuit. The sea temperature in September is slightly warmer than the previous month.
Also consider visiting San Francisco in one of the other best months of June, July, August, for the best beach weather. Also consider one of our other suggestions for September.
Yes, September is a great time for sunbathing in San Francisco.
September has average maximum temperatures of 23°C (74°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright. September has total rainfall of 0.5cm (0.2inches) making it extremely dry with only very rare light showers. There are just 1.3 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between.
More about September temperature and sunshine.
No, September is too cold for swimming in San Francisco for any length of time, with the sea water at 17°C (62°F), unless you have a wetsuit.
More about September sea temperatures.
Yes, September is a good time for a holiday in San Francisco.
September has average maximum temperatures of 23°C (74°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright. September has total rainfall of 0.5cm (0.2inches) making it extremely dry with only very rare light showers. There are just 1.3 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between. Sea temperatures are a cold 17°C (62°F). September is too cold for swimming in San Francisco for any length of time, unless you have a wetsuit.
More about the September temperatures and sunshine.
Yes, San Francisco is nice and warm and makes sunbathing pleasant on clear days in September.
The average maximum temperature in San Francisco in September is 23°C (74°F). The average maximum temperature is 22°C (72°) in the previous month and 22°C (71°F) in the next month.
The average temperature in San Francisco in September is 18°C (65°F). The average temperature is 18°C (64°F) in the previous month and 17°C (62°F) in the next month.
More info about the September temperatures and sunshine.
The average day light hours per day in San Francisco in September are 12.4. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright.
More about September sunshine.
The weather in September is slightly warmer than the previous month. The average maximum temperature in San Francisco in September is 23°C (74°F). The average maximum temperature is 22°C (72°F) in the previous month and 22°C (71°F) in the next month.
The average temperature in San Francisco in September is 18°C (65°F). The average temperature is 18°C (64°F) in the previous month and 17°C (62°F) in the next month.
The average minimum temperature in San Francisco in September is 13°C (56°F). The minimum temperature is 14°C (56°F) in the previous month and 12°C (54°F) in the next month.
The days in September are shorter than the previous month and days continue to get shorter into October. September has less hours of sunshine than the previous month and hours of sunshine continue to drop quickly into October. During September the average day light hours are 12.4 per day in San Francisco. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright.
The ultraviolet index in San Francisco in September is typically 7.6 during September. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The average sea water temperature in San Francisco in September is 16.7°C (62.1°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water. The sea temperature in September is slightly warmer than the previous month.
September weather is marginally wetter than the previous month and rainfall continues to rise into October. September has a couple of more days of rain than the previous month and rainy days continue to rise into October. The average total rainfall in San Francisco in September is 0.5cm (0.2inches) and on average there are 1.3 rainy days in September making it an extremely dry time to visit the beach.
The maximum dew point (an indicator of humidity) in San Francisco in September is 14°C (56°F) which is comfortable for everyone. The dew point is 13°C (56°F) in the previous month and 13°C (13°F) in the next month.
The average maximum relative humidity in San Francisco in September is typically 87.1%. The maximum relative humidity is 88.7% in the previous month and 85.9% in the next month.
The average relative humidity in San Francisco in September is typically 69.5%. The average relative humidity is 72.9% in the previous month and 68% in the next month.
The average maximum wind speed in San Francisco in September is typically 36KM/H (22MPH). The average maximum wind speed is 37KM/H (23MPH) in the previous month and 32KM/H (20MPH) in the next month.
The average wind speed in San Francisco in September is typically 16KM/H (10MPH). The average wind speed is 18KM/H (11MPH) in the previous month and 13KM/H (8MPH) in the next month.
The average wind direction in San Francisco in September is from the West-Northwest.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
