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Guam Climate & Weather

Guam Climate and Weather


Guam has a tropical marine climate, and remains hot and humid year-round with an average temperature between 86°F (30°C) and 76°F (24°C). The rainy season occurs between July and November, and there is a greater risk of typhoons in October and November. Guam is located in the area of the Pacific known as Typhoon alley, and is hit by a storm roughly once every eight years. The dry season in Guam is from December to June. There is little variation in temperature throughout the year and Guam is generally hot and humid. The heat is pleasantly moderated by northeast trade winds. The summer months of May and June are the warmest and December is the coolest month in Guam.

Guam is a year-round destination and visitors can often barely distinguish the difference between the wet and dry seasons. The best time to visit Guam is between December and June to miss the worst of the heat and humidity and to avoid typhoon season. It does still rain in the dry season but much less than during the rest of the year. Travel during the wet season can also be very pleasant though, and it is slightly cheaper.


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