Saint Helena Climatic Classifications

CodeDescriptionGroupNumber of states/regionsStates/regions
BwhSubtropical desertArid2 Ascension Saint Helena
CfbMarine west coast, warm summerTemperate1 Tristan da Cuna

Summary: Most regions (2) in Saint Helena lie in the Subtropical desert climate zone (Köppen: Bwh). The mean average of annual temperatures range from a high of 24.97°C (76.95°F) in Ascension to a low of 15.2°C (59.36°F) in Tristan da Cuna.

Climate Saint Helena: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)25.59(78.06)26.4(79.52)27.21(80.98)27.29(81.12)26.74(80.13)25.9(78.62)25.04(77.07)24.24(75.63)23.83(74.89)23.89(75.0)24.11(75.4)24.54(76.17)27.29(81.12)
Average high °C (°F)22.6(72.68)23.36(74.05)23.49(74.28)23.07(73.53)22.17(71.91)21.22(70.2)20.15(68.27)19.42(66.96)19.11(66.4)19.33(66.79)20.02(68.04)21.22(70.2)21.26(70.27)
Daily mean °C (°F)21.84(71.31)22.63(72.73)22.83(73.09)22.44(72.39)21.39(70.5)20.37(68.67)19.32(66.78)18.63(65.53)18.28(64.9)18.54(65.37)19.26(66.67)20.51(68.92)20.5(68.9)
Average low °C (°F)20.7(69.26)21.66(70.99)21.97(71.55)21.61(70.9)20.39(68.7)19.39(66.9)18.26(64.87)17.64(63.75)17.24(63.03)17.52(63.54)18.26(64.87)19.45(67.01)19.51(67.12)
Record low °C (°F)16.51(61.72)17.26(63.07)17.04(62.67)16.16(61.09)14.26(57.67)13.23(55.81)12.19(53.94)11.67(53.01)11.42(52.56)12.07(53.73)13.41(56.14)15.56(60.01)11.42(52.56)
Average precipitation mm (inches)41.36(1.63)37.9(1.49)68.23(2.69)68.81(2.71)73.6(2.9)73.06(2.88)75.18(2.96)67.12(2.64)66.58(2.62)72.49(2.85)52.09(2.05)50.62(1.99)62.25(2.45)
Average precipitation days (≥ 1.0 mm)6.857.619.2110.0911.4914.4214.715.7313.9111.949.739.8811.3
Average relative humidity (%)80.1779.1478.6377.6975.9575.1775.7276.8778.4980.3480.8680.3578.28
Mean monthly sunshine hours10.819.989.779.458.157.858.278.448.299.1610.1410.549.24

Saint Helena Climate Graph

Saint Helena

Saint Helena’s Cities by Temperature

Saint Helena’s states/regions ranking by average yearly temperature:

Ascension
24.97°C | 76.95°F
Saint Helena
21.34°C | 70.41°F
Tristan da Cuna
15.2°C | 59.36°F

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