December characterizes the driest month of the year with rainfall plunging dramatically to 8mm (0.31"). The sea temperature retreats to 28.2°C (82.8°F), the lowest for the year, which could impact water enthusiasts. As the humidity drops to its annual low, comfortable weather conditions take over the coastal city of
Pattaya. The month flaunts pleasant temperatures and ample sunshine hours despite slightly shorter days. The Christmas season shines bright in December, rounding off the year on a cheerful note.
Temperature
Pattaya's coldest temperatures are experienced in December, with average high temperatures of 30°C (86°F) and lows of 22.5°C (72.5°F).
Heat index
In December, the average heat index is appraised at a torrid 35°C (95°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.
Humidity
With an average relative humidity of 70%, December is the least humid month in Pattaya.
Rainfall
December is the month with the least rainfall. Rain falls for 1 days and accumulates 8mm (0.31") of precipitation.
Sea temperature
In December, the average sea temperature is 28.2°C (82.8°F).
Note: Swimming, diving, and other activities in water temperatures between 25°C (77°F) and 29°C (84.2°F) are thought to be quite enjoyable and satisfying for extended periods, with no discomfort.
Daylight
December has the shortest days of the year in Pattaya, with an average of 11h and 24min of daylight.
On the first day of the month, sunrise is at 06:22 and sunset at 17:48. On the last day of December, in Pattaya, sunrise is at 06:38 and sunset at 18:00 +07.
Sunshine
The months with the most sunshine in Pattaya,
Thailand, are
January through
April and December, with an average of 8h of sunshine.
UV index
The month with the lowest UV index is December, with an average maximum UV index of 9. A UV Index value of 8 to 10 symbolizes a very high health risk from exposure to the Sun's UV rays for the average person.
Note: In December, the maximum UV index of 9 translates into these guidelines:
Protection is paramount; otherwise, swift harm can come to the skin and eyes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Experience reduced UV exposure by about half when donning a wide-brim hat. Prompt application of a broad-spectrum sunscreen, SPF 30+, is necessary after a swim or an outdoor workout and it should be re-applied every two hours. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.