Weather in Kailua Beach, Kailua, United States in September

So you're interested in going to Kailua Beach, Kailua, United States in September

September is a hot and rainy time for sunbathing in Kailua Beach. September is an excellent month for swimming in Kailua Beach with very warm sea temperatures. Consider visiting Kailua Beach in the months of May, June, August, September, for the best beach weather. Also consider one of our other suggestions for September.

Temperature in Kailua Beach in September

The average maximum temperature in Kailua Beach in September is 29°. The average maximum temperature is 29° in the previous month and 28° in the next month.

The average temperature in Kailua Beach in September is 27°. The average temperature ranges is 27° in the previous month and 26° in the next month.

The average minimum temperature in Kailua Beach in September is 24°. The minimum temperature is 24° in the previous month and 24° in the next month.

Sunshine in Kailua Beach in September

The average day light hours per day in Kailua Beach in September are 12.3 and there are 7 hours of sunshine per day on average during September making it a quite sunny month with some cloud cover.

The ultraviolet index in Kailua Beach in September is typically 11.8 during September. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. 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 Kailua Beach in September

The average sea water temperature in Kailua Beach in September is 27.4° which is very warm and ideal for relaxing and swimming for the whole day.

Rainfall in Kailua Beach in September

The average total rainfall in Kailua Beach in September is 2.3cm and on average there are 19 rainy days in September making it a wet time to visit the beach.

Humidity in Kailua Beach in September

The maximum dew point (an indicator of humidity) in Kailua Beach in September is 22° which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan. The dew point is 22° in the previous month and 22° in the next month.

The average maximum relative humidity in Kailua Beach in September is typically 84.9%. The maximum relative humidity is 85.2% in the previous month and 85.9% in the next month.

The average relative humidity in Kailua Beach in September is typically 73.3%. The average relative humidity is 73.3% in the previous month and 74.5% in the next month.

Wind Speed in Kailua Beach in September

The average maximum wind speed in Kailua Beach in September is typically 20kmh. The average maximum wind speed is 22kmh in the previous month and 20kmh in the next month.

The average wind speed in Kailua Beach in September is typically 12kmh. The average wind speed is 13kmh in the previous month and 11kmh in the next month.

The average wind direction in Kailua Beach in September is from the East-Northeast.

Monthly Averages

Suggested Beaches in September

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