Pago Pago
American Samoa, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Pago Pago, AS

Aerial view of Pago Pago Harbour in Pago Pago, American Samoa
Aerial view of Pago Pago Harbour in Pago Pago, American Samoa
The first month of the spring, September, is also a moderately hot month in Pago Pago, American Samoa, with temperature in the range of an average low of 79.3°F (26.3°C) and an average high of 81.5°F (27.5°C).

Temperature

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

Heat index

In September, the average heat index is appraised at a hot 87.1°F (30.6°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. 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 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, pregnancy, clothing), and activity. 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 especially crucial for babies and toddlers. 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

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

Rainfall

The month with the least rainfall in Pago Pago is September when the rain falls for 20 days and typically collects 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.
Note: 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 September, the average length of the day in Pago Pago is 12h.

Sunshine

In September, the average sunshine is 7.8h.

UV index

Months with the highest UV index in Pago Pago are January through December, with an average maximum UV index of 7. Months with the lowest UV index in Pago Pago, American Samoa, are January through December, 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 the UV radiation for average individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.

What is the temperature in September in Pago Pago?

The average high-temperature, in September, in Pago Pago, 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', 'apparent temperature'), that factores the actual air temperature with the relative humidity, in September is appraised at 87.1°F (30.6°C).

What is the most humid month in Pago Pago?

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

What is the average humidity in September in Pago Pago?

The average relative humidity in September in Pago Pago is 78%.

How many days does it rain in September in Pago Pago?

In Pago Pago, 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 in Pago Pago. Rain falls for 20 days and accumulates 1.77" (45mm) of precipitation.

What are the months with the coldest ocean in Pago 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 Pago?

In Pago Pago, American Samoa, in September, the average water temperature 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 Pago have in September?

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

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

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

When is 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 are the months with the lowest UV index in Pago Pago?

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

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

In September, the average daily maximum UV index in Pago Pago, American Samoa, is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Pago Pago, AS
  • Average high temperature in September: 27.5°C

The warmest month (with the highest average high temperature) is April (28.9°C).
The month with the lowest average high temperature is August (27.3°C).

  • Average low temperature in September: 26.3°C

The month with the highest average low temperature is March (28°C).
Coldest months (with the lowest average low temperature) are July, August and September (26.3°C).

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%).

Average rainfall in September - Pago Pago, AS
  • Average rainfall in September: 45mm

The wettest month (with the highest rainfall) is January (173mm).
The driest month (with the lowest rainfall) is September (45mm).

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 lowest number of rainy days is September (20 days).

Average sea temperature in September - Pago Pago, AS
  • Average sea temperature in September: 27.8°C

The best month for swimming (with the highest average sea temperature) is March (29.7°C).
Coldest months (with the lowest average sea temperature) are August and September (27.8°C).

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 shortest days is June (Average daylight: 11.3h).

  • Average sunshine in September: 7.8h

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

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).