Guam Government House Weather in December
What's the weather like in Guam Government House (Hagåtña Municipality) in December 2025?
The climate in Guam Government House during December can be summarized as hot, humid and wet.
December is in the winter in Guam Government House and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a steamy 30°C (86°F), whilst at night 25°C (76°F) is normal.
| Daytime temperature | 30.2°C 86.3°F |
|---|---|
| Nightly temperature | 24.5°C 76°F |
| Average temperature | 27.3°C 81.1°F |
| Daily sunshine | 5 hrs |
| Avg rainfall | 150 mm 5.9 ins |
| Rainy days | 23 days |
| Sea temperature | 28.5°C 83.3°F |
| Humidity | 83% |
| Windspeed | 11.9kph 7 mph |
On average December is the 6th driest month of the year in Guam Government House with around 150mm 5.9 inches of rain making it a wet time to visit. This rainfall is typically spread over 23 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 hours of sunshine per day.
December temperatures in Guam Government House
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Guam Government House in December 2025.
Other monthly averages
Best places to visit in December
Guam Government House weather stats
| Hottest month: | June | 30.9°C 87.6°F |
|---|---|---|
| Driest month: | March | 89mm 3.5ins |
| Sunniest month: | March | 7.4hrs |
| Coldest month: | February | 29.6°C 85.3°F |
| Wettest month: | August | 363mm 14.3ins |
© Google