Weather in San Luis Obispo County, United States in September

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Visiting San Luis Obispo County, United States in September

September is one of the best months to visit San Luis Obispo County for the best beach weather. It has the most sunshine and best sunbathing and swimming conditions of the year.

September has average maximum temperatures of 28°C (83°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 79% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.8hrs 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 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 chilly 19°C (66°F). September is a little too cold to enjoy swimming in San Luis Obispo County for prolonged periods of time.

Also consider visiting San Luis Obispo County 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 San Luis Obispo County in September?

Yes, September is a great time for sunbathing in San Luis Obispo County.

September has average maximum temperatures of 28°C (83°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 79% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.8hrs 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 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 San Luis Obispo County in September?

Probably not, September is a little too cold to enjoy swimming in San Luis Obispo County for prolonged periods of time with the sea water at 19°C (66°F).

More about September sea temperatures.

Is September a good time to holiday in San Luis Obispo County?

Yes, September is a great time for a holiday in San Luis Obispo County.

September has average maximum temperatures of 28°C (83°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 79% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.8hrs 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 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 chilly 19°C (66°F). September is a little too cold to enjoy swimming in San Luis Obispo County for prolonged periods of time.

More about the September temperatures and sunshine.

Is San Luis Obispo County warm in September?

Yes, San Luis Obispo County is very warm and perfect for sunbathing on clear days in September.

The average maximum temperature in San Luis Obispo County in September is 28°C (83°F). The average maximum temperature is 29°C (84°) in the previous month and 25°C (77°F) in the next month.

The average temperature in San Luis Obispo County in September is 20°C (68°F). The average temperature is 20°C (69°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 San Luis Obispo County in September?

The average day light hours per day in San Luis Obispo County in September are 12.4. The sunshine percentage is 79% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.8hrs making the days long and bright.

More about September sunshine.

Temperature in San Luis Obispo County in September

The average maximum temperature in San Luis Obispo County in September is 28°C (83°F). The average maximum temperature is 29°C (84°F) in the previous month and 25°C (77°F) in the next month.

The average temperature in San Luis Obispo County in September is 20°C (68°F). The average temperature is 20°C (69°F) in the previous month and 17°C (63°F) in the next month.

The average minimum temperature in San Luis Obispo County in September is 12°C (53°F). The minimum temperature is 13°C (55°F) in the previous month and 10°C (49°F) in the next month.

Sunshine in San Luis Obispo County in September

During September the average day light hours are 12.4 per day in San Luis Obispo County. The sunshine percentage is 79% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.8hrs making the days long and bright.

The ultraviolet index in San Luis Obispo County 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 San Luis Obispo County in September

The average sea water temperature in San Luis Obispo County in September is 18.9°C (66.0°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water.

Rainfall in San Luis Obispo County in September

The average total rainfall in San Luis Obispo County in September is 0.5cm (0.2inches) and on average there are 1 rainy days in September making it an extremely dry time to visit the beach.

Humidity in San Luis Obispo County in September

The maximum dew point (an indicator of humidity) in San Luis Obispo County in September is 12°C (53°F) which is very comfortable. The dew point is 13°C (55°F) in the previous month and 10°C (10°F) in the next month.

The average maximum relative humidity in San Luis Obispo County in September is typically 87.2%. The maximum relative humidity is 89.5% in the previous month and 86.8% in the next month.

The average relative humidity in San Luis Obispo County in September is typically 64.9%. The average relative humidity is 67.4% in the previous month and 64.8% in the next month.

Wind Speed in San Luis Obispo County in September

The average maximum wind speed in San Luis Obispo County in September is typically 27KM/H (17MPH). The average maximum wind speed is 28KM/H (17MPH) in the previous month and 26KM/H (16MPH) in the next month.

The average wind speed in San Luis Obispo County in September is typically 8KM/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 San Luis Obispo County in September is from the West-Northwest.

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.