Guam climate
World Climates covers 1 place in Guam. Hagåtña has a tropical monsoon climate (Köppen Am).
Climate of Hagåtña at a glance
The year average in Hagåtña is 28 °C83 °F. The warmest month is June, with an average high of 29 °C84 °F. The coldest is February, with an average low of 27 °C80 °F. About 1,607 mm63 in of precipitation falls in a year. August is the wettest month and March the driest. By our comfort score, the best months to visit are December–May.
Frequently asked questions
How many places in Guam does this site cover?
World Climates has climate data for one place in Guam: Hagåtña. Its page has monthly averages for temperature, rainfall, humidity and daylight.
What is the warmest month in Hagåtña?
June is the warmest month, with an average high of 29 °C84 °F. February is the coldest, with an average low of 27 °C80 °F.
When does it rain the most in Hagåtña?
August is the wettest month, with about 315 mm12 in of precipitation. The yearly total is about 1,607 mm63 in.
When is the best time to visit Hagåtña?
By our comfort score, the most comfortable months are December–May. The score is based on long-term averages, not on a forecast.
Climate of every place in Guam
| Place | Year | Max high | Min low | Precip. |
|---|---|---|---|---|
| Hagåtña | 28 | 29 | 27 | 1,607 |
Year = annual mean temperature; max high = average high of the warmest month; min low = average low of the coldest month; precip. = annual total. Temperatures in °C°F, precipitation in mminches. Sorted by population.
Data: NASA POWER climatology 2001–2025 (MERRA-2 reanalysis, CERES satellite data) — grid-cell averages, not station records. Sources and method.