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 rainy days per month Precipitation in mm/day Relative humidity in % Absolute humidity in g/m³ (approx.)
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.
More detailed information on global warming with a view by continent can also be found on our topic page on climate change