September weather forecast and climate
Pago Pago, AS

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

Weather in September

The first month of the spring, September, is still a warm month in Pago Pago, American Samoa, with average temperature fluctuating between 81.5°F (27.5°C) and 79.3°F (26.3°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still moderately hot 81.5°F (27.5°C). In Pago Pago, the average low-temperature is 79.3°F (26.3°C).

Heat index

In September, the average heat index is evaluated at a tropical 87.1°F (30.6°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the 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 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, wind, pregnancy). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

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

Rainfall

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

Ocean temperature

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

In September, the average length of the day is 12h.

Sunshine

In Pago Pago, the average sunshine is 7.8h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Pago Pago. Months with the lowest UV index in Pago Pago are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in September in Pago Pago?

The average high-temperature, in September, is 81.5°F (27.5°C), while the average low-temperature is 79.3°F (26.3°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), that represents influence of the relative humidity to air temperaure, in September is appraised at 87.1°F (30.6°C).

What is the most humid month in Pago Pago?

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

What is the average humidity in September in Pago Pago?

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

How much does it rain in Pago Pago in September?

In Pago Pago, American Samoa, in September, during 20 rainfall days, 1.77" (45mm) of precipitation is typically accumulated.

What is the driest month in Pago Pago?

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

What months are the ocean coldest in Pago Pago?

Months with the coldest seawater in Pago Pago, American Samoa, are August and September, with an average ocean temperature of 82°F (27.8°C).

What is the water temperature in September in Pago Pago?

In Pago Pago, the average seawater temperature in September is 82°F (27.8°C). 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.

How many hours of daylight does Pago Pago have in September?

In September, the average length of the day is 12h.

How long on average sun shines in September in Pago Pago?

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

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

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

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

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

What is the UV index reading in September in Pago Pago?

In Pago Pago, American Samoa, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation.

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"

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

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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%

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

The month with the longest days is December (Average daylight: 13h).
The month with the shortest days is June (Average daylight: 11.3h).

  • Average sunshine in September: 7.8h

The month with the most sunshine is December (Average sunshine: 9.7h).
The month with the least sunshine is July (Average sunshine: 7.2h).

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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

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

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

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