Northern Mariana Islands Climatic Classifications

CodeDescriptionGroupNumber of states/regionsStates/regions
AfTropical rainforestTropical4 Northern Islands Rota Saipan Tinian

Summary: Most regions (4) in Northern Mariana Islands lie in the Tropical rainforest climate zone (Köppen: Af). The mean average of annual temperatures range from a high of 28.34°C (83.01°F) in Rota to a low of 27.54°C (81.57°F) in Northern Islands.

Climate Northern Mariana Islands: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)27.79(82.02)27.42(81.36)27.7(81.86)28.25(82.85)28.89(84.0)29.25(84.65)29.34(84.81)29.33(84.79)29.34(84.81)29.1(84.38)28.98(84.16)28.55(83.39)29.34(84.81)
Average high °C (°F)27.1(80.78)26.65(79.97)27.0(80.6)27.67(81.81)28.55(83.39)29.14(84.45)29.33(84.79)29.3(84.74)29.29(84.72)29.04(84.27)28.77(83.79)28.13(82.63)28.33(82.99)
Daily mean °C (°F)26.88(80.38)26.41(79.54)26.76(80.17)27.4(81.32)28.31(82.96)28.91(84.04)29.03(84.25)29.03(84.25)29.02(84.24)28.78(83.8)28.54(83.37)27.91(82.24)28.08(82.54)
Average low °C (°F)26.37(79.47)25.87(78.57)26.28(79.3)26.95(80.51)27.8(82.04)28.42(83.16)28.55(83.39)28.46(83.23)28.46(83.23)28.19(82.74)27.92(82.26)27.36(81.25)27.55(81.59)
Record low °C (°F)24.84(76.71)24.39(75.9)25.16(77.29)26.12(79.02)27.42(81.36)28.37(83.07)28.5(83.3)28.39(83.1)28.41(83.14)28.16(82.69)27.5(81.5)26.67(80.01)24.39(75.9)
Average precipitation mm (inches)127.93(5.04)80.49(3.17)77.87(3.07)109.84(4.32)137.29(5.41)179.66(7.07)353.52(13.92)509.27(20.05)462.97(18.23)458.74(18.06)199.2(7.84)107.49(4.23)233.69(9.2)
Average precipitation days (≥ 1.0 mm)17.715.8414.7115.7318.1622.1427.4327.5527.1126.7721.1818.3421.06
Average relative humidity (%)77.2777.1377.8878.6177.7976.9876.6276.4176.7477.5578.0777.5677.38
Mean monthly sunshine hours9.7710.4210.5911.2912.5612.6912.2910.7210.578.988.038.0510.5

Northern Mariana Islands Climate Graph

Northern Mariana Islands

Northern Mariana Islands’s Cities by Temperature

Northern Mariana Islands’s states/regions ranking by average yearly temperature:

Rota
28.34°C | 83.01°F
Saipan
28.22°C | 82.8°F
Tinian
28.22°C | 82.8°F
Northern Islands
27.54°C | 81.57°F

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