American Samoa Climatic Classifications

CodeDescriptionGroupNumber of states/regionsStates/regions
AwTropical wet and dry or savannaTropical5 Eastern Manu'a Rose Island Swains Island Western

Summary: Most regions (5) in American Samoa lie in the Tropical wet and dry or savanna climate zone (Köppen: Aw). The mean average of annual temperatures range from a high of 28.53°C (83.35°F) in Swains Island to a low of 27.87°C (82.17°F) in Manu'a.

Climate American Samoa: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)28.93(84.07)28.82(83.88)29.0(84.2)29.12(84.42)29.08(84.34)28.86(83.95)28.55(83.39)28.35(83.03)28.41(83.14)28.5(83.3)28.71(83.68)28.77(83.79)29.12(84.42)
Average high °C (°F)28.73(83.71)28.7(83.66)28.94(84.09)28.88(83.98)28.56(83.41)28.09(82.56)27.61(81.7)27.4(81.32)27.56(81.61)27.89(82.2)28.2(82.76)28.42(83.16)28.25(82.85)
Daily mean °C (°F)28.43(83.17)28.4(83.12)28.66(83.59)28.64(83.55)28.35(83.03)27.9(82.22)27.37(81.27)27.2(80.96)27.36(81.25)27.65(81.77)27.94(82.29)28.14(82.65)28.0(82.4)
Average low °C (°F)27.46(81.43)27.43(81.37)27.83(82.09)27.83(82.09)27.42(81.36)26.92(80.46)26.36(79.45)26.3(79.34)26.41(79.54)26.61(79.9)26.99(80.58)27.16(80.89)27.06(80.71)
Record low °C (°F)27.41(81.34)27.41(81.34)27.8(82.04)27.74(81.93)27.28(81.1)26.72(80.1)26.1(78.98)26.09(78.96)26.21(79.18)26.45(79.61)26.88(80.38)27.07(80.73)26.09(78.96)
Average precipitation mm (inches)201.19(7.92)227.81(8.97)109.24(4.3)122.66(4.83)141.12(5.56)83.1(3.27)94.56(3.72)74.42(2.93)71.09(2.8)115.17(4.53)113.73(4.48)159.84(6.29)126.16(4.97)
Average precipitation days (≥ 1.0 mm)21.4219.7521.1721.4719.4514.3315.4213.9214.6318.4318.9821.8718.4
Average relative humidity (%)75.6176.0474.575.3776.3877.5577.677.2277.5476.9876.1475.4676.37
Mean monthly sunshine hours10.710.2810.6510.449.569.39.7310.1610.3711.5812.1512.0310.58

American Samoa Climate Graph

American Samoa

American Samoa’s Cities by Temperature

American Samoa’s states/regions ranking by average yearly temperature:

Swains Island
28.53°C | 83.35°F
Manu'a
27.87°C | 82.17°F
Rose Island
27.87°C | 82.17°F
Eastern
27.87°C | 82.17°F
Western
27.87°C | 82.17°F

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