The climate in American Samoa

Average daytime and nighttime temperatures


All climatic diagrams of this page are taken from the collected data from 2 measuring stations in American Samoa.
All data correspond to the average monthly values of the last 20 years.


Back to overview: American Samoa

Climate zone: tropics

High humidity in American Samoa and high temperatures are causing a pleasant weather at times, but also and partly tropical hot and humid. It is yearlong warm or hot. Dued to the lesser rain the best time for traveling is from June to August. Most precipitation decrease in January.

Duration of daylight and sunshine in American Samoa

hours of sunshine per day
Sunshine hours per day in American Samoa

Climate charts for other regions in American Samoa

Eastern District
Western District
rainy days per month
Rainy days per month in American Samoa
Precipitation in mm/day
Precipitation in American Samoa
Relative humidity in %
Relative humidity in American Samoa
Absolute humidity in g/m³ (approx.)
Absolute humidity in American Samoa

Long-term development of temperatures from 1999 - 2019

In contrast to single record values, a long-term development cannot simply be brought about by all weather stations in the country. Both the number and the locations are constantly changing. A simply calculated average value would give a falsified result. If several measuring stations in particularly cold mountain or coastal regions are added in one year, the average would already decrease as a result of this alone. If a station fails during the summer or winter months, it does not provide any values and falsifies the average again. The subsequent long-term development was therefore reduced to only 1 measuring points in order to have actually comparable data over as long a period as possible.

In the years 1999 to 2019 there were only these 1 weather stations in the whole country, which reported continuous temperature values (Pago Pago). From these weather reports we have created a long-term development that shows the monthly average temperatures. The hottest month in this entire period was 2002 with 29.8 °C. 2015 was the coldest month with an average temperature of 26.2 °C.

The average annual temperature was about 28.2 °C in the years after 1999 and about 27.8 °C in the last years before 2019. So it has dropped by about 0.3 °C. This trend only applies to the selected 1 weather stations in American Samoa. A considerably more comprehensive evaluation of the global warming has been provided separately.

Long-term development of temperatures in American Samoa


More detailed information on global warming with a view by continent can also be found on our topic page on climate change.