September weather forecast
Pago Pago, AS

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Pago Pago Harbour in Pago Pago, American Samoa
Pago Pago Harbour in Pago Pago, American Samoa

Weather in September

September brings minimal changes in the weather in Pago compared to August. The high temperature sees a minute rise, while the low temperature remains steady. Incredibly, September records the lowest rainfall of the year at 1.77" (45mm). The increase in daylight hours is consistent, indicating longer days. In tandem with this, the sea temperature starts to rise, making beach-going even more pleasant.

Temperature

During September, Pago records an average high-temperature of a still moderately hot 81.5°F (27.5°C), marking a slight divergence from August's 81.1°F (27.3°C). Pago registers a gentle descent to an average nighttime low of 79.3°F (26.3°C) in September from its daytime highs.

Heat index

September's average heat index is calculated to be a hot 87.8°F (31°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.
Heat index details are generally centered around shaded locations and a mild breeze. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.

Humidity

The months with the highest humidity in Pago are June through October, with an average relative humidity of 78%.

Rainfall

September is the month with the least rainfall in Pago, American Samoa. Rain falls for 20 days and accumulates 1.77" (45mm) of precipitation.

Ocean temperature

The months with the coldest seawater are August and September, with an average ocean temperature of 82°F (27.8°C).
Note: For swimming, diving, and enjoying other water activities, the range of 77°F (25°C) to 84.2°F (29°C) in water temperature is considered ideal, offering pleasure for extended periods without discomfort.

Daylight

In September, the average length of the day in Pago is 12h and 2min.
On the first day of the month, sunrise is at 6:27 am and sunset at 6:18 pm. On the last day of September, sunrise is at 6:05 am and sunset at 6:19 pm SST.

Sunshine

In Pago, the average sunshine in September is 7.8h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during September translates into the following guidance:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be wary! Reflections from sand and water make UV radiation more intense.
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Frequently asked questions

What are the temperatures in Pago in September?

September temperatures in Pago vary between a high-temperature of 81.5°F (27.5°C) and a low-temperature of 79.3°F (26.3°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, is calculated to be 87.8°F (31°C).

What is the most humid month in Pago?

June through October, with an average relative humidity of 78%, are most humid months in Pago, American Samoa.

What is the average humidity in September in Pago?

In September, the average relative humidity in Pago is 78%.

What is the driest month in Pago?

The month with the least rainfall in Pago, American Samoa, is September, when the rain falls for 20 days and typically collects 1.77" (45mm) of precipitation.

How much does it rain in Pago in September?

In September, the rain falls for 20 days. Throughout September, 1.77" (45mm) of precipitation is accumulated.

When is the ocean coldest in Pago?

August and September, with an average ocean temperature of 82°F (27.8°C), are months with the coldest seawater.

What is the water temperature in September in Pago?

In Pago, the average seawater temperature in September is 82°F (27.8°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 Pago have in September?

The average day length in September is 12h and 2min.

What time are sunrise and sunset in September in Pago?

In September, on the first day of the month, sunrise is at 6:27 am and sunset at 6:18 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 6:19 pm SST.

How long on average sun shines in September in Pago?

In September, the average sunshine duration in Pago, American Samoa, is 7.8h.

When is the highest UV index in Pago?

January through December, with an average maximum UV index of 7, are months with the highest UV index.

What is the month with the lowest UV index in Pago?

The months with the lowest UV index in Pago are January through December, with an average maximum UV index of 7.

What is the UV index reading in September in Pago?

The average daily maximum UV index in September in Pago, American Samoa, is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.

Average temperature in September
Pago Pago, AS

Average temperature in September - Pago Pago, AS
  • Average high temperature in September: 81.5°F

The warmest month (with the highest average high temperature) is April (84°F).
The month with the lowest average high temperature is August (81.1°F).

  • Average low temperature in September: 79.3°F

The month with the highest average low temperature is March (82.4°F).
The coldest months (with the lowest average low temperature) are July, August and September (79.3°F).

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Average pressure in September
Pago Pago, AS

Average pressure in September - Pago Pago, AS
  • Average pressure in September: 29.91"Hg

The month with the highest atmospheric pressure is September (29.91"Hg).
The month with the lowest atmospheric pressure is January (29.75"Hg).

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Average wind speed in September
Pago Pago, AS

Average wind speed in September - Pago Pago, AS
  • Average wind speed in September: 14.7mph

The windiest month (with the highest average wind speed) is July (15.6mph).
The calmest month (with the lowest average wind speed) is March (8.6mph).

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Average humidity in September
Pago Pago, AS

Average humidity in September - Pago Pago, AS
  • Average humidity in September: 78%

The months with the highest relative humidity are June, July, August, September and October (78%).
The month with the lowest relative humidity is March (75%).

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Average rainfall in September
Pago Pago, AS

Average rainfall in September - Pago Pago, AS
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is January (6.81").
The driest month (with the least rainfall) is September (1.77").

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Average rainfall days in September
Pago Pago, AS

Average rainfall days in September - Pago Pago, AS
  • Average rainfall days in September: 20 days

The month with the highest number of rainy days is March (26.1 days).
The month with the least rainy days is September (20 days).

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Average sea temperature in September
Pago Pago, AS

Average sea temperature in September - Pago Pago, AS
  • Average sea temperature in September: 82°F

The best month for swimming (with the highest average sea temperature) is March (85.4°F).
The coldest months (with the lowest average sea temperature) are August and September (82°F).

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Average daylight in September /
Average sunshine in September
Pago Pago, AS

Average daylight in September / Average sunshine in September - Pago Pago, AS
  • Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 0min).
The month with the shortest days is June (Average daylight: 11h and 18min).

  • Average sunshine in September: 7h and 5min

The month with the most sunshine is December (Average sunshine: 9h and 42min).
The month with the least sunshine is July (Average sunshine: 7h and 12min).

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Average sunshine days in September
Pago Pago, AS

Average sunshine days in September - Pago Pago, AS
  • Average sunshine days in September: 6.1 days

The month with the most sunshine days is September (6.1 days).
The month with the least sunshine days is April (2.3 days).

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Average UV index in September
Pago Pago, AS

Average UV index in September - Pago Pago, AS
  • Average UV index in September: 7

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

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Average cloud cover in September
Pago Pago, AS

Average cloud cover in September - Pago Pago, AS
  • Average cloud cover in September: 45

The month with the most cloud cover is July (Cloud cover 49).
The month with the least cloud cover is March (Cloud cover 40).

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Average visibility in September
Pago Pago, AS

Average visibility in September - Pago Pago, AS
  • 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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Pago Pago, American Samoa, USA

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