Guam Climate by Month
The weather in Guam is characterized by a steady average temperature throughout the year.
It is also known for its large amounts of rainfall.
Now, let’s explore all the climate details to give you a full picture.
Average day and night temperature
With minimal seasonal shifts, Guam experiences a constant climate year-round. Typically, daytime temperatures range from a comfortable 30°C in June to a comfortable 28°C in the coolest month, February. Nights are cooler, with temperatures generally dropping to 26°C, particularly during the colder months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Guam has a notably wet climate with abundant precipitation, recording 2128 mm of rainfall per year. The climate in Guam shows significant variation throughout the year. Expect heavy rainfall in August, with an average of 362 mm of precipitation over 20 rainy days. In contrast, March offers drier and sunnier days, with around 59 mm of rainfall over 20 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
For those who appreciate different seasons, Guam serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 7.4 hours of sunshine daily, and embrace the darker days in September, offering only 4.4 hours of daily sunlight.Monthly hours of sunshine
Daily hours of sunshine
The best time of year to visit Guam in Micronesia
Guam has high temperatures year round ranging between 28°C and 29°C.Other facts from our historical weather data:
Rainy season in Guam occurs in the months of June, July, August, September, October and November.
June has an average maximum temperature of 30°C and is the hottest month of the year.
The coolest month is February with an average maximum temperature of 28°C.
August tops the wettest month list with 362 mm of rainfall.
March is the driest month with 59 mm of precipitation.
May is the sunniest month with an average of 223 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
