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The American Samoa islands are located in the southern Pacific Ocean between the Equator and the Tropic of Capricorn at about 14 ° South latitude. Due to their position, the climate of American Samoa is tropical, with high temperatures and high humidity during all year round, and with moderate winds generally from the southeast. The rains are very abundant in all the islands of the archipelago.
In American Samoa the rainy season runs from November to April, this is also the period of cyclones. American Samoa are affected on average by more than one tropical cyclone per year, the annual average varies between 1.3 and 1.6 cyclones. In American Samoa the relatively dry season runs from June to September.
Total rainfall is very abundant, for example over 3,000 mm of rain fall annually in Pago Pago on the island of Tutuila. The rainiest month is December with over 350 mm of rain per month. The months in which it rains least are those between June and September, but even in these months it exceeds 150 mm of rain per month. In Pago Pago it rains on average for over 250 days a year, in the driest month, August, there are over 17 rainy days.
In the two seasons, the dry and the humid, which characterize the climate of the islands, the temperature varies by a few degrees centigrade. The maximum average temperatures are constant throughout the year between 31 ° C and 29 ° C, the average minimum temperatures remain throughout the year around 24 ° C. Sea water has stable temperatures between 29 ° C and 27 ° C throughout the year.
WHEN TO GO TO THE AMERICAN SAMOA ISLANDS
The best time to visit American Samoa are the relatively dry months between June and September.
THE CLIMATE OF THE AMERICAN SAMOA: CLIMATE TABLES
CLIMATE TABLE OF PAGO PAGO
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| PAGO PAGO | |||
| Month | Average low (°C) | Average high (°C) | Precip. (mm) |
| January | 24 | 30 | 336 |
| February | 24 | 30 | 322 |
| March | 24 | 31 | 290 |
| April | 24 | 30 | 288 |
| May | 24 | 30 | 263 |
| June | 24 | 29 | 160 |
| July | 24 | 29 | 155 |
| August | 24 | 29 | 164 |
| September | 24 | 29 | 178 |
| October | 24 | 29 | 263 |
| November | 24 | 30 | 278 |
| December | 24 | 30 | 354 |
| YEAR | 3051 |
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TABLE OF SURFACE TEMPERATURES OF SEA WATER IN AMERICAN SAMOA
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| PAGO PAGO | |
| Month | Sea Water Temperature °C |
| January | 29 |
| February | 29 |
| March | 29 |
| April | 29 |
| May | 28 |
| June | 28 |
| July | 27 |
| August | 27 |
| September | 27 |
| October | 28 |
| November | 28 |
| December | 28 |
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