December weather forecast
Boston, Philippines

The first month of the winter, December, is still a warm month in Boston, Philippines, with temperature in the range of an average low of 21.5°C (70.7°F) and an average high of 29.7°C (85.5°F).

Temperature

Boston notes an average high-temperature of a moderately hot 29.7°C (85.5°F) in December, displaying minor variation from November. Nightly temperatures drop to an average low of 21.5°C (70.7°F) in December.

Heat index

December's mean heat index is appraised at a very hot 38°C (100.4°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. 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 surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Boston, the average relative humidity in December is 86%.

Rainfall

In Boston, in December, it is raining for 20.8 days, with typically 110mm (4.33") of accumulated precipitation. In Boston, during the entire year, the rain falls for 279.1 days and collects up to 1414mm (55.67") of precipitation.

Sea temperature

In Boston, Philippines, in December, the average water temperature is 28.8°C (83.8°F).
Note: Engaging in swimming, diving, or other water activities is highly enjoyable in temperatures ranging from 25°C (77°F) to 29°C (84.2°F), without any unpleasant sensations for prolonged durations.

Daylight

The month with the shortest days in Boston is December, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 5:32 am and sunset at 5:14 pm. On the last day of December, sunrise is at 5:47 am and sunset at 5:27 pm PST.

Sunshine

In Boston, the average sunshine in December is 7.5h.

UV index

January through March, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Boston. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 6 translates into these guidelines:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Notice! Sand and water reflections contribute to a stronger UV exposure.