September weather forecast
Iroquois Point, HI

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Weather in September

The first month of the autumn, September, is still a warm month in Iroquois Point, Hawaii, with an average temperature ranging between min 75.6°F (24.2°C) and max 81.5°F (27.5°C).

Temperature

The warmest period is September, when temperatures fluctuate between an average high of 81.5°F (27.5°C) and a low of 75.6°F (24.2°C).

Heat index

The heat index for September is estimated at a tropical 86°F (30°C). Continuous activity in exposure could lead to a feeling of fatigue and heat cramps.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular importance for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.

Humidity

April, May, September and November, with an average relative humidity of 74%, are the least humid months in Iroquois Point.

Rainfall

In Iroquois Point, during September, the rain falls for 17.9 days and regularly aggregates up to 1.22" (31mm) of precipitation. In Iroquois Point, during the entire year, the rain falls for 197.2 days and collects up to 14.61" (371mm) of precipitation.

Ocean temperature

The month with the warmest seawater in Iroquois Point is September, with an average ocean temperature of 80.4°F (26.9°C).
Note: Surface water temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are seen as ideal and highly pleasant for extended enjoyment in all water activities.

Daylight

The average length of the day in September in Iroquois Point is 12h and 15min.
On the first day of the month, sunrise is at 6:15 am and sunset at 6:47 pm. On the last day of September, in Iroquois Point, sunrise is at 6:23 am and sunset at 6:20 pm HST.

Sunshine

In Iroquois Point, the average sunshine in September is 8.9h.

UV index

The months with the highest UV index are July through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Heads up! UV intensity is amplified by reflections from water and sand.
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Frequently asked questions

What are the warmest months in Iroquois Point?

Iroquois Point's warmest weather arrives in September, when temperatures average a high of 81.5°F (27.5°C) and a low of 75.6°F (24.2°C).

What is the usual temperature for Iroquois Point in September?

The high-temperature, in September, in Iroquois Point, is 81.5°F (27.5°C), while the low-temperature averages to 75.6°F (24.2°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is estimated at 86°F (30°C).

What are the least humid months in Iroquois Point?

April, May, September and November, with an average relative humidity of 74%, are the least humid months in Iroquois Point.

What is the average humidity in September in Iroquois Point?

In September, the average relative humidity in Iroquois Point is 74%.

How many days does it rain in September in Iroquois Point?

In Iroquois Point, in September, during 17.9 rainfall days, 1.22" (31mm) of precipitation is typically accumulated.

When is the ocean warmest in Iroquois Point?

The month with the warmest seawater is September, with an average ocean temperature of 80.4°F (26.9°C).

How warm is the water in September in Iroquois Point?

In September, the average ocean temperature in Iroquois Point, Hawaii, is 80.4°F (26.9°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.

What is the average length of the day in September in Iroquois Point?

In Iroquois Point, Hawaii, the average day length in September is 12h and 15min.

What time are sunrise and sunset in September in Iroquois Point?

In September, on the first day of the month, sunrise is at 6:15 am and sunset at 6:47 pm. On the last day of the month, in Iroquois Point, Hawaii, sunrise is at 6:23 am and sunset at 6:20 pm HST.

How many hours of sunshine does Iroquois Point have in September?

The average sunshine duration in September in Iroquois Point is 8.9h.

What is the month with the highest UV index in Iroquois Point?

July through September, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index intensity in September in Iroquois Point?

The average daily maximum UV index in September in Iroquois Point is 7. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.

Average temperature in September
Iroquois Point, HI

Average temperature in September - Iroquois Point, HI
  • Average high temperature in September: 81.5°F

The warmest month (with the highest average high temperature) is September (81.5°F).
The months with the lowest average high temperature are February and March (75°F).

  • Average low temperature in September: 75.6°F

The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).

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Average pressure in September
Iroquois Point, HI

Average pressure in September - Iroquois Point, HI
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).

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Average wind speed in September
Iroquois Point, HI

Average wind speed in September - Iroquois Point, HI
  • Average wind speed in September: 9.9mph

The windiest month (with the highest average wind speed) is July (12.1mph).
The calmest month (with the lowest average wind speed) is January (9mph).

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Average humidity in September
Iroquois Point, HI

Average humidity in September - Iroquois Point, HI
  • Average humidity in September: 74%

The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April, May, September and November (74%).

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Average rainfall in September
Iroquois Point, HI

Average rainfall in September - Iroquois Point, HI
  • Average rainfall in September: 1.22"

The wettest months (with the highest rainfall) are March and October (1.81").
The driest month (with the least rainfall) is July (0.67").

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Average rainfall days in September
Iroquois Point, HI

Average rainfall days in September - Iroquois Point, HI
  • Average rainfall days in September: 17.9 days

The months with the highest number of rainy days are March and October (18 days).
The month with the least rainy days is January (12.6 days).

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Average sea temperature in September
Iroquois Point, HI

Average sea temperature in September - Iroquois Point, HI
  • Average sea temperature in September: 80.4°F

The best month for swimming (with the highest average sea temperature) is September (80.4°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).

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Average daylight in September /
Average sunshine in September
Iroquois Point, HI

Average daylight in September / Average sunshine in September - Iroquois Point, HI
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 48min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).

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Average sunshine days in September
Iroquois Point, HI

Average sunshine days in September - Iroquois Point, HI
  • Average sunshine days in September: 6.9 days

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is October (6.3 days).

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Average UV index in September
Iroquois Point, HI

Average UV index in September - Iroquois Point, HI
  • Average UV index in September: 7

The months with the highest UV index are July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).

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Average cloud cover in September
Iroquois Point, HI

Average cloud cover in September - Iroquois Point, HI
  • Average cloud cover in September: 33

The month with the most cloud cover is March (Cloud cover 40).
The months with the least cloud cover are January and September (Cloud cover 33).

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Average visibility in September
Iroquois Point, HI

Average visibility in September - Iroquois Point, HI
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Iroquois Point, Hawaii, USA

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