Northern Mariana Islands Climatic Classifications

Code Description Group Number of states/regions States/regions
Af Tropical rainforest Tropical 4 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

Month Jan Feb Mar Apr May Jun Jul Aug Sep Nov Oct Dec Year
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) 17.7 15.84 14.71 15.73 18.16 22.14 27.43 27.55 27.11 26.77 21.18 18.34 21.06
Average relative humidity (%) 77.27 77.13 77.88 78.61 77.79 76.98 76.62 76.41 76.74 77.55 78.07 77.56 77.38
Mean monthly sunshine hours 9.77 10.42 10.59 11.29 12.56 12.69 12.29 10.72 10.57 8.98 8.03 8.05 10.5

Northern Mariana Islands Climate Graph

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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