Hana
Hawaii, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Hana, HI

September, the first month of the autumn, in Hana, is still a warm month, with temperature in the range of an average low of 70°F (21.1°C) and an average high of 82.9°F (28.3°C).

Temperature

August and September, with an average high-temperature of 82.9°F (28.3°C), are the warmest months.

Rainfall

In Hana, it is raining for 14 days, with typically 6.8" (173.2mm) of accumulated precipitation. In Hana, during the entire year, the rain falls for 171 days and collects up to 82.5" (2096.7mm) of precipitation.

Ocean temperature

September is the month with the warmest seawater, with an average ocean temperature of 80.1°F (26.7°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day is 12.3h.

Sunshine

Months with the most sunshine are June through September, with an average of 8h of sunshine.

UV index

In Hana, the average daily maximum UV index in September is 11. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 11 in September interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the warmest month in Hana?

Warmest months are August and September, with an average high-temperature of 82.9°F (28.3°C).

What is the temperature in September in Hana?

In Hana, Hawaii, in September, the average high-temperature is 82.9°F (28.3°C), and the average low-temperature is 70°F (21.1°C).

How many days does it rain in September in Hana?

In Hana, during September, the rain falls for 14 days and regularly aggregates up to 6.8" (173.2mm) of precipitation.

When is the ocean warmest in Hana?

With an average ocean temperature of 80.1°F (26.7°C), September is the month with the warmest seawater.

How warm is the water in September in Hana?

In Hana, in September, the average water temperature is 80.1°F (26.7°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Hana have in September?

In Hana, the average length of the day in September is 12.3h.

What is the month with the most sunshine in Hana?

Months with the most sunshine in Hana, Hawaii, are June through September, with an average of 8h of sunshine.

How many hours of sunshine does Hana have in September?

In September, the average sunshine is 8h.

What is the UV index intensity in September in Hana?

In Hana, the average daily maximum UV index in September is 11. A UV Index of 11, and more, symbolizes an excessive health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Hana, HI
  • Average high temperature in September: 28.3°C

Warmest months (with the highest average high temperature) are August and September (28.3°C).
Months with the lowest average high temperature are January, February and March (25.6°C).

  • Average low temperature in September: 21.1°C

The month with the highest average low temperature is August (22.2°C).
The coldest month (with the lowest average low temperature) is February (17.8°C).

Average rainfall in September - Hana, HI
  • Average rainfall in September: 173.2mm

The wettest month (with the highest rainfall) is March (241.8mm).
The driest month (with the lowest rainfall) is June (103.6mm).

Average rainfall days in September - Hana, HI
  • Average rainfall days in September: 14 days

Months with the highest number of rainy days are April, July and August (16 days).
Months with the lowest number of rainy days are January and February (12 days).

Average sea temperature in September - Hana, HI
  • Average sea temperature in September: 26.7°C

The best month for swimming (with the highest average sea temperature) is September (26.7°C).
The coldest month (with the lowest average sea temperature) is March (24.3°C).

Average daylight in September / Average sunshine in September - Hana, HI
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in September: 8h

Months with most sunshine are June, July, August and September (Average sunshine: 8h).
Months with least sunshine are November and December (Average sunshine: 6).

Average UV index in September - Hana, HI
  • Average UV index in September: 11

Months with the highest UV index are June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 6).