December weather forecast
Yap, Micronesia

Wrapping up the year, December weather dynamics in Yap echo those witnessed in November, albeit with minor variations. The rainfall dips further to 228mm (8.98"), indicating dry weather persisting from November. A slight fluctuation in temperature sees the thermometers reading a high of 30.7°C (87.3°F), suggesting consistency in warm climatic conditions. As this month experiences consistent warm temperatures and decreasing rainfall, it offers an excellent opportunity to immerse in various outdoor adventures. With December providing the best of warm temperatures and a drier climate, it indeed serves as an ideal month to conclude a year's travel in Yap, Micronesia.

Temperature

Yap's shift into December is marked by a subtle change to a still hot 30.7°C (87.3°F) from November's 30.4°C (86.7°F) in temperature. During the nights in December, the temperature averages to a moderately hot 23.7°C (74.7°F).

Heat index

December's mean heat index is estimated at a scorching 41°C (105.8°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', quantifies the warmth felt when relative humidity is considered. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In December, the rain falls for 17.6 days. Throughout December, 228mm (8.98") of precipitation is accumulated. Throughout the year, there are 211.6 rainfall days, and 3050mm (120.08") of precipitation is accumulated.

Sea temperature

May through December, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.
Note: Swimming, diving, and other water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are highly enjoyable and provide prolonged comfort without unease.

Daylight

The month with the shortest days is December, with an average of 11h and 36min of daylight.
On the first day of the month, sunrise is at 06:48 and sunset at 18:24. On the last day of December, sunrise is at 07:03 and sunset at 18:37 +10.

Sunshine

In December, the average sunshine is 6.4h.

UV index

With an average maximum UV index of 10, December is the month with the lowest UV index in Yap. A UV Index reading of 8 to 10 represents a very high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 10 during December translates into the following directions:
Take all necessary measures. Eyes and skin are at risk if left unprotected. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Even on overcast days, ensure the application and frequent reapplication of sunscreen with at least an SPF 30, especially post swim or outdoor exercise. Beware! Reflections from sand and water can intensify the Sun's UV radiation.