Weather in San Luis Obispo County, United States in September

So you're interested in going to San Luis Obispo County, United States in September

September is a hot and extremely dry time for sunbathing in San Luis Obispo County. September is a little too cold to enjoy swimming in San Luis Obispo County for any length of time. Consider visiting San Luis Obispo County in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for September.

Temperature in San Luis Obispo County in September

The average maximum temperature in San Luis Obispo County in September is 28°. The average maximum temperature is 29° in the previous month and 25° in the next month.

The average temperature in San Luis Obispo County in September is 20°. The average temperature ranges is 20° in the previous month and 17° in the next month.

The average minimum temperature in San Luis Obispo County in September is 12°. The minimum temperature is 13° in the previous month and 10° in the next month.

Sunshine in San Luis Obispo County in September

The average day light hours per day in San Luis Obispo County in September are 12.4 and there are 9.8 hours of sunshine per day on average during September making it a sunny month with few clouds.

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° 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 0.2cm 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° which is very comfortable. The dew point is 13° in the previous month and 10° 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 27kmh. The average maximum wind speed is 28kmh in the previous month and 26kmh in the next month.

The average wind speed in San Luis Obispo County in September is typically 8kmh. The average wind speed is 9kmh in the previous month and 8kmh 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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