Weather in California, United States in September

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Visiting California, United States in September

September is one of the best months to visit California 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 24°C (76°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 73.6% 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 1cm (0.4inches) making it extremely dry with only very rare light showers. There are just 1.8 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 cool 19°C (66°F). September is a slightly chilly month for swimming in California. The sea temperature in September is slightly warmer than the previous month.

Also consider visiting California 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.

Can you sunbathe in California in September?

Yes, September is a great time for sunbathing in California.

September has average maximum temperatures of 24°C (76°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 73.6% 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 1cm (0.4inches) making it extremely dry with only very rare light showers. There are just 1.8 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.

Can you swim in California in September?

Yes, September is a a slightly chilly month for swimming in California with cool sea temperatures 19°C (66°F).

More about September sea temperatures.

Is September a good time to holiday in California?

Yes, September is a good time for a holiday in California.

September has average maximum temperatures of 24°C (76°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 73.6% 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 1cm (0.4inches) making it extremely dry with only very rare light showers. There are just 1.8 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 cool 19°C (66°F). September is a slightly chilly month for swimming in California.

More about the September temperatures and sunshine.

Is California warm in September?

Yes, California is nice and warm and makes sunbathing pleasant on clear days in September.

The average maximum temperature in California in September is 24°C (76°F). The average maximum temperature is 24°C (75°) in the previous month and 23°C (73°F) in the next month.

The average temperature in California in September is 19°C (67°F). The average temperature is 20°C (67°F) in the previous month and 17°C (63°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is California in September?

The average day light hours per day in California in September are 12.4. The sunshine percentage is 73.6% 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.

Temperature in California in September

The weather in September is slightly warmer than the previous month. The average maximum temperature in California in September is 24°C (76°F). The average maximum temperature is 24°C (75°F) in the previous month and 23°C (73°F) in the next month.

The average temperature in California in September is 19°C (67°F). The average temperature is 20°C (67°F) in the previous month and 17°C (63°F) in the next month.

The average minimum temperature in California in September is 14°C (58°F). The minimum temperature is 15°C (59°F) in the previous month and 12°C (54°F) in the next month.

Sunshine in California in September

The days in September are shorter than the previous month and days continue to get shorter into October. September has fewer hours of sunshine than the previous month and hours of sunshine continue to drop into October. During September the average day light hours are 12.4 per day in California. The sunshine percentage is 73.6% 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 California in September is typically 8.4 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.

Sea Temperature in California in September

The average sea water temperature in California in September is 19.1°C (66.4°F) which is comfortable for swimming though some may prefer warmer water. The sea temperature in September is slightly warmer than the previous month.

Rainfall in California in September

September weather is slightly drier than the previous month. 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 California in September is 1cm (0.4inches) and on average there are 1.8 rainy days in September making it an extremely dry time to visit the beach.

Humidity in California in September

The maximum dew point (an indicator of humidity) in California in September is 15°C (59°F) which is comfortable for everyone. The dew point is 15°C (59°F) in the previous month and 13°C (13°F) in the next month.

The average maximum relative humidity in California in September is typically 88.9%. The maximum relative humidity is 89.7% in the previous month and 87.4% in the next month.

The average relative humidity in California in September is typically 72.1%. The average relative humidity is 74.3% in the previous month and 69.4% in the next month.

Wind Speed in California in September

The average maximum wind speed in California in September is typically 23KM/H (15MPH). The average maximum wind speed is 24KM/H (15MPH) in the previous month and 23KM/H (14MPH) in the next month.

The average wind speed in California in September is typically 9KM/H (5MPH). The average wind speed is 9KM/H (6MPH) in the previous month and 8KM/H (5MPH) in the next month.

The average wind direction in California in September is from the West.

Monthly Averages

Suggested Beaches in September

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Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.

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Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.