December weather forecast
Hua Hin, Thailand

December, the first month of the winter in Hua Hin, is still a warm month, with temperature in the range of an average high of 29.5°C (85.1°F) and an average low of 22.5°C (72.5°F).
The ideal sea water temperature of 28°C (82.4°F) and only 2 rainfall days, with 8mm (0.31") of accumulated rainfall, makes December the best time for swimming and other water activities.

Temperature

December is the coldest month in Hua Hin, with an average high-temperature of 29.5°C (85.1°F) and an average low-temperature of 22.5°C (72.5°F).

Heat index

In December, the average heat index is computed to be a hot 33°C (91.4°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like wind, metabolic differences, clothing, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

December is the least humid month, with an average relative humidity of 67%.

Rainfall

December is the month with the least rainfall. Rain falls for 2 days and accumulates 8mm (0.31") of precipitation.

Sea temperature

The months with the coldest seawater in Hua Hin are January, February and December, with an average sea temperature of 28°C (82.4°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The month with the shortest days is December, with an average of 11h and 24min of daylight.
On the first day of December, sunrise is at 06:25 and sunset at 17:52. On the last day of the month, sunrise is at 06:41 and sunset at 18:05 +07.

Sunshine

January through March and December, with an average of 9h of sunshine, are months with the most sunshine in Hua Hin.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 9. A UV Index of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 9 in December transform into the following instructions:
Take special precautions, as unprotected skin can be damaged and can burn quickly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.