Guam Climatic Classifications

Summary: Most regions (19) in Guam lie in the Tropical rainforest climate zone (Köppen: Af). The mean average of annual temperatures range from a high of 28.33°C (82.99°F) in Yigo to a low of 28.33°C (82.99°F) in Yigo.

Climate Guam: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)27.77(81.99)27.44(81.39)27.7(81.86)28.29(82.92)28.91(84.04)29.28(84.7)29.34(84.81)29.26(84.67)29.28(84.7)29.05(84.29)28.97(84.15)28.55(83.39)29.34(84.81)
Average high °C (°F)27.77(81.99)27.44(81.39)27.7(81.86)28.29(82.92)28.91(84.04)29.28(84.7)29.34(84.81)29.26(84.67)29.28(84.7)29.05(84.29)28.97(84.15)28.55(83.39)28.65(83.57)
Daily mean °C (°F)27.55(81.59)27.16(80.89)27.39(81.3)27.85(82.13)28.58(83.44)28.98(84.16)28.96(84.13)28.9(84.02)28.92(84.06)28.69(83.64)28.75(83.75)28.21(82.78)28.33(82.99)
Average low °C (°F)26.97(80.55)26.5(79.7)26.69(80.04)27.32(81.18)27.94(82.29)28.31(82.96)28.33(82.99)28.12(82.62)28.17(82.71)27.99(82.38)28.01(82.42)27.62(81.72)27.66(81.79)
Record low °C (°F)26.97(80.55)26.5(79.7)26.69(80.04)27.32(81.18)27.94(82.29)28.31(82.96)28.33(82.99)28.12(82.62)28.17(82.71)27.99(82.38)28.01(82.42)27.62(81.72)26.5(79.7)
Average precipitation mm (inches)70.8(2.79)56.06(2.21)45.32(1.78)63.78(2.51)90.81(3.58)98.07(3.86)191.0(7.52)244.75(9.64)263.27(10.36)213.35(8.4)127.59(5.02)70.0(2.76)127.9(5.04)
Average precipitation days (≥ 1.0 mm)14.459.7310.9112.0915.6420.026.5525.9125.8224.9117.6414.4518.17
Average relative humidity (%)77.8477.1777.8878.2177.6476.9676.5876.1676.2877.378.1777.8577.34
Mean monthly sunshine hours10.0210.3310.4810.7912.2912.4110.910.0910.079.287.848.7110.27

Guam Climate Graph

Guam

Guam’s Cities by Temperature

Guam’s states/regions ranking by average yearly temperature:

Yigo
28.33°C | 82.99°F
Merizo
28.33°C | 82.99°F
Mangilao
28.33°C | 82.99°F
Inarajan
28.33°C | 82.99°F
Mongmong-Toto-Maite
28.33°C | 82.99°F
Barrigada
28.33°C | 82.99°F
Hagåtña
28.33°C | 82.99°F
Santa Rita
28.33°C | 82.99°F
Sinajana
28.33°C | 82.99°F
Tamuning
28.33°C | 82.99°F
Chalan Pago-Ordot
28.33°C | 82.99°F
Yona
28.33°C | 82.99°F
Asan
28.33°C | 82.99°F
Piti
28.33°C | 82.99°F
Dededo
28.33°C | 82.99°F
Talofofo
28.33°C | 82.99°F
Agat
28.33°C | 82.99°F
Umatac
28.33°C | 82.99°F
Agana Heights
28.33°C | 82.99°F

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