Weather in Diamond Head, Honolulu, United States in September

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Visiting Diamond Head, Honolulu, United States in September

The weather in September is marginally cooler than the previous month and temperatures continue to drop slightly into October. September has average maximum temperatures of 31°C (88°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 56% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.9 hours of sunshine per day. It is a good time for sunbathing in Diamond Head.

September has total rainfall of 6.7cm (2.6inches) making it mostly dry with only intermittent light showers. There are only 14.8 days with some rainfall so you can still enjoy the beach on the majority of days.

Sea temperatures are a very warm 27°C (81°F). September is an excellent month for swimming in Diamond Head with very comfortable temperatures for bathing all day.

In September, the weather remains warm and sunny, providing perfect conditions for beach activities. Swimming, sunbathing, snorkeling, and diving are all enjoyable during this month. Surfing conditions begin to improve, and the trade winds continue to make windsurfing and kitesurfing popular. Consider visiting Diamond Head in the months of June, July, August, October, for the best beach weather. Also consider one of our other suggestions for September.

Can you sunbathe in Diamond Head in September?

Yes, September is a good time for sunbathing in Diamond Head.

September has average maximum temperatures of 31°C (88°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 56% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.9 hours of sunshine per day. September has total rainfall of 6.7cm (2.6inches) making it mostly dry with only intermittent light showers. There are only 14.8 days with some rainfall so you can still enjoy the beach on the majority of days.

More about September temperature and sunshine.

Can you swim in Diamond Head in September?

Yes, September is an excellent month for swimming in Diamond Head with very warm sea temperatures 27°C (81°F).

More about September sea temperatures.

Is September a good time to holiday in Diamond Head?

Yes, September is a good time for a holiday in Diamond Head.

September has average maximum temperatures of 31°C (88°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 56% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.9 hours of sunshine per day. September has total rainfall of 6.7cm (2.6inches) making it mostly dry with only intermittent light showers. There are only 14.8 days with some rainfall so you can still enjoy the beach on the majority of days. It is a good time for sunbathing in Diamond Head. Sea temperatures are a very warm 27°C (81°F). September is an excellent month for swimming in Diamond Head with very comfortable temperatures for bathing all day.

More about the September temperatures and sunshine.

Is Diamond Head warm in September?

Yes, Diamond Head is very hot and perfect for sunbathing on clear days in September.

The average maximum temperature in Diamond Head in September is 31°C (88°F). The average maximum temperature is 31°C (88°) in the previous month and 30°C (86°F) in the next month.

The average temperature in Diamond Head in September is 28°C (82°F). The average temperature is 28°C (82°F) in the previous month and 27°C (80°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is Diamond Head in September?

The average day light hours per day in Diamond Head in September are 12.3. The sunshine percentage is 56% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.9 hours of sunshine per day.

More about September sunshine.

Crowds in Diamond Head in September

September sees a decrease in crowds as the summer season comes to an end and children return to school. However, the beach at Diamond Head can still get quite crowded, especially during the Labor Day weekend. The weather remains warm and inviting for beach activities.

Temperature in Diamond Head in September

The weather in September is marginally cooler than the previous month and temperatures continue to drop slightly into October. The average maximum temperature in Diamond Head in September is 31°C (88°F). The average maximum temperature is 31°C (88°F) in the previous month and 30°C (86°F) in the next month.

The average temperature in Diamond Head in September is 28°C (82°F). The average temperature is 28°C (82°F) in the previous month and 27°C (80°F) in the next month.

The average minimum temperature in Diamond Head in September is 24°C (74°F). The minimum temperature is 24°C (75°F) in the previous month and 23°C (74°F) in the next month.

Sunshine in Diamond Head in September

The days in September are slightly shorter than the previous month and days continue to get slightly shorter into October. During September the average day light hours are 12.3 per day in Diamond Head. The sunshine percentage is 56% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.9 hours of sunshine per day.

The ultraviolet index in Diamond Head 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 Diamond Head in September

The average sea water temperature in Diamond Head in September is 27.4°C (81.3°F) which is very warm and ideal for relaxing and swimming for the whole day.

Rainfall in Diamond Head in September

September weather is slightly drier than the previous month. September has a few more days of rain than the previous month. The average total rainfall in Diamond Head in September is 6.7cm (2.6inches) and on average there are 14.8 rainy days in September making it a pretty wet time to visit the beach.

Humidity in Diamond Head in September

The maximum dew point (an indicator of humidity) in Diamond Head in September is 21°C (70°F) which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 21°C (69°F) in the previous month and 21°C (21°F) in the next month.

The average maximum relative humidity in Diamond Head in September is typically 80.8%. The maximum relative humidity is 77% in the previous month and 81.5% in the next month.

The average relative humidity in Diamond Head in September is typically 64.6%. The average relative humidity is 62.2% in the previous month and 66.9% in the next month.

Wind Speed in Diamond Head in September

The average maximum wind speed in Diamond Head in September is typically 32KM/H (20MPH). The average maximum wind speed is 34KM/H (21MPH) in the previous month and 30KM/H (19MPH) in the next month.

The average wind speed in Diamond Head in September is typically 16KM/H (10MPH). The average wind speed is 18KM/H (11MPH) in the previous month and 15KM/H (9MPH) in the next month.

The average wind direction in Diamond Head in September is from the North-Northeast.

Monthly Averages

Suggested Beaches in September

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Need Inspiration?

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