About American Samoa Weather
American Samoa is warm, humid and rainy year-round. Located south of the equator, its seasons are the opposite of the United States and the rest of the northern hemisphere. The park has a long wet summer (October - May) and a slightly cooler and drier season (June - September). Rain showers are frequent and last anywhere from a few minutes to several days. Average annual rainfall is 125 inches at the airport at Pago Pago and up to 200 inches elsewhere on the islands.
| Month | Avg High | Avg Low | Record High | Record Low | Avg Pcpt |
| January | 87° | 76° | 95°/1998 | 67°/1965 | 14.02" |
| February | 87° | 76° | 99°/1958 | 65°/1965 | 12.14" |
| March | 87° | 77° | 95°/1998 | 63°/1965 | 11.15" |
| April | 87° | 76° | 95°/1998 | 68°/1979 | 11.16" |
| May | 86° | 76° | 93°/2000 | 65°/1964 | 10.43" |
| June | 85° | 76° | 95°/1988 | 61°/1965 | 5.94" |
| July | 84° | 75° | 91°/2002 | 62°/1964 | 5.76" |
| August | 84° | 75° | 92°/2002 | 60°/1964 | 6.43" |
| September | 85° | 76° | 92°/2002 | 62°/1964 | 7.36" |
| October | 85° | 76° | 94°/2001 | 59°/1964 | 10.03" |
| November | 86° | 77° | 95°/1998 | 60°/1959 | 11.16" |
| December | 87° | 76° | 94°/2001 | 65°/1964 | 13.38" |
