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Guam
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Guam Weather and climate
Data source：Meteostat
Update date：2025-09
Guam year round climate
- Spring (March–May): Average 27.1–28.0°C, warm and humid climate, rainfall gradually increases. Common activities: scuba diving, snorkeling, beach activities. Recommended clothing: light short-sleeved clothing, shorts, swimwear, sun protection clothing.
- Summer (June–August): Average 27.5–27.9°C, hot and humid, frequent rainfall, occasional tropical storms. Common activities: water sports, beach leisure, exploring the island interior. Recommended clothing: light and breathable clothing, shorts, sandals, sunscreen.
- Autumn (September–November): Average 27.3–27.8°C, the climate remains warm and humid, with higher rainfall, peak of the rainy season. Common activities: viewing tropical plants, visiting historical sites, enjoying a relaxing island life. Recommended clothing: light and breathable clothing, rain gear.
- Winter (December–February): Average 26.7–27.5°C, the climate is relatively drier, with less rainfall, but still warm and humid. Common activities: scuba diving, snorkeling, beach leisure. Recommended clothing: light long-sleeved clothing, long pants or shorts.
Guam climatological average
Annual average temperature: approx. 27.4°C / Annual rainfall: approx. 2758 mm / Summer humidity: 75%–85% / Rainiest month: September
Guam monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
26.7°C
188.3
February
26.8°C
75.3
March
27.1°C
79.3
April
27.6°C
143
May
28°C
316
June
27.9°C
185.7
July
27.6°C
253.3
August
27.5°C
368.3
September
27.6°C
428.3
October
27.3°C
405.3
November
27.8°C
155
December
27.5°C
161
Guam weather for the next seven days
10/13
Monday
Moderate rain
29.1°C/27.4°C
10/14
Tuesday
Moderate rain
27.9°C/25.9°C
10/15
Wednesday
Heavy rain
25.9°C/23.8°C
10/16
Thursday
Heavy rain
26°C/25.4°C
10/17
Friday
Moderate rain
28.5°C/27.2°C
10/18
Saturday
Patchy rain nearby
28°C/27.4°C
10/19
Sunday
Moderate rain
28.9°C/27.2°C
