December weather forecast
Agat, GU

December brings the soothing cool weather to Agat, granting a relief from the comparatively hot climate witnessed through the year. Interestingly, even towards the end of the year, the minimum temperature stays at a comfortable 82°F (27.8°C), providing an enjoyable atmosphere. This month shows a marked decrease in rainfall from November, measuring at 2.99" (76mm), contributing to the pleasant climate of the town. As the year concludes, Agat offers the perfect tropical winter escape with warmer temperatures and lesser rainfall compared to most regions.

Temperature

The shift into December in Agat, Guam, uncovers an average high-temperature of a still moderately hot 83.5°F (28.6°C), subtly different from the previous month. In the month of December, Agat experiences a minor discrepancy from peak daytime temperatures, settling at an average low-temperature of 82°F (27.8°C).

Heat index

The heat index value during December is calculated to be a tropical 91.4°F (33°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

The months with the highest humidity in Agat are January, March through May, October through December, with an average relative humidity of 78%.

Rainfall

In Agat, in December, it is raining for 22.8 days, with typically 2.99" (76mm) of accumulated precipitation. In Agat, Guam, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Daylight

The month with the shortest days in Agat is December, with an average of 11h and 24min of daylight.
On the first day of December in Agat, sunrise is at 6:28 am and sunset at 5:52 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:04 pm ChST.

Sunshine

The average sunshine in December is 6.5h.

UV index

The months with the highest UV index in Agat are January through August, October through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index, 7 in December, converts into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.