September weather forecast and climate
Kapalua, HI

The first month of the autumn, September, is also a warm month in Kapalua, Hawaii, with average temperature varying between 64.4°F (18°C) and 82.4°F (28°C).

Temperature

Warmest months are August and September, with an average high-temperature of 82.4°F (28°C).

Rainfall

In Kapalua, during 8 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. In Kapalua, during the entire year, the rain falls for 128 days and collects up to 52.8" (1340mm) of precipitation.

Ocean temperature

September and October, with an average ocean temperature of 80.6°F (27°C), are months with the warmest seawater in Kapalua. For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

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

Sunshine

The average sunshine in September is 8h.

UV index

In Kapalua, the average UV index in September is 11.

What is the warmest month in Kapalua?

August and September, with an average high-temperature of 82.4°F (28°C), are warmest months.

What is the temperature in September in Kapalua?

In Kapalua, in September, the average high-temperature is 82.4°F (28°C), and the average low-temperature is 64.4°F (18°C).

How many days does it rain in September in Kapalua?

In Kapalua, in September, it is raining for 8 days, with typically 2.2" (56mm) of accumulated precipitation.

What are the months with the warmest ocean in Kapalua?

September and October, with an average ocean temperature of 80.6°F (27°C), are months with the warmest seawater in Kapalua. For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the ocean temperature in September in Kapalua?

In Kapalua, in September, the average water temperature is 80.6°F (27°C). 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.

How many hours of daylight does Kapalua have in September?

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

How long on average sun shines in September in Kapalua?

In Kapalua, the average sunshine in September is 8h.

What is the UV index intensity in September in Kapalua?

The average UV index in September in Kapalua is 11.
Average temperature in September - Kapalua, HI
  • Average high temperature in September: 28°C

Warmest months (with the highest average high temperature) are August and September (28°C).
Months with the lowest average high temperature are January, February and March (24°C).

  • Average low temperature in September: 18°C

Months with the highest average low temperature are July and August (19°C).
Coldest months (with the lowest average low temperature) are January and February (15°C).

Average rainfall in September - Kapalua, HI
  • Average rainfall in September: 56mm

The wettest month (with the highest rainfall) is January (192mm).
The driest month (with the lowest rainfall) is June (48mm).

Average rainfall days in September - Kapalua, HI
  • Average rainfall days in September: 8 days

Months with the highest number of rainy days are March, April and December (13 days).
Months with the lowest number of rainy days are June and September (8 days).

Average sea temperature in September - Kapalua, HI
  • Average sea temperature in September: 27°C

Best months for swimming (with the highest average sea temperature) are September and October (27°C).
Coldest months (with the lowest average sea temperature) are January, February, March and April (24°C).

Average daylight in September / Average sunshine in September - Kapalua, 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 and August (Average sunshine: 9h).
Months with least sunshine are January, February, October, November and December (Average sunshine: 7).

Average UV index in September - Kapalua, 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).

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