December weather forecast
Rayong, Thailand

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Weather in December

December marks a return to the stable weather conditions observed at the start of the year, with low rainfall and high daylight hours. Even as the temperature begins to experience a slight decrease, the town’s typical warm weather remains. December has the significant distinction of minimum rainfall, averaging a paltry 6mm (0.24"), marking the driest period of the year. Even with receding daylight hours, the conditions continue to favor tourism and outdoor engagements.

Temperature

The arrival of December records an average high-temperature of a still hot 32°C (89.6°F), closely related to the 32.6°C (90.7°F) observed in November. December brings with it a nighttime average temperature of 21.3°C (70.3°F).

Heat index

The heat index in December is estimated at an extremely hot 40°C (104°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. 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' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The least humid month is December, with an average relative humidity of 70%.

Rainfall

The month with the least rainfall is December, when the rain falls for 1 days and typically collects 6mm (0.24") of precipitation.

Sea temperature

In Rayong, Thailand, in December, the average water temperature is 28.3°C (82.9°F).
Note: Water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are pleasurable, without feeling uncomfortable even during extended periods.

Daylight

December has the shortest days of the year, with an average of 11h and 24min of daylight.
On the first day of the month, sunrise is at 06:21 and sunset at 17:47. On the last day of December, in Rayong, sunrise is at 06:36 and sunset at 18:00 +07.

Frequently asked questions

How hot does it get in Rayong in December?

The high-temperature during December is 32°C (89.6°F) and the low-temperature is 21.3°C (70.3°F). In December, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is estimated at 40°C (104°F).

What is the least humid month in Rayong?

The least humid month is December, with an average relative humidity of 70%.

What is the average humidity in December in Rayong?

In Rayong, the average relative humidity in December is 70%.

What is the driest month in Rayong?

December is the month with the least rainfall in Rayong, Thailand. Rain falls for 1 days and accumulates 6mm (0.24") of precipitation.

How many days does it rain in December in Rayong?

In Rayong, Thailand, in December, it is raining for 1 days, with typically 6mm (0.24") of accumulated precipitation.

What is the water temperature in December in Rayong?

In Rayong, Thailand, in December, the average water temperature is 28.3°C (82.9°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Rayong?

December has the shortest days of the year in Rayong, Thailand, with an average of 11h and 24min of daylight.

What is the average length of the day in December in Rayong?

The average day length in December in Rayong is 11h and 23min.

When is the sunrise / sunset in December in Rayong?

On the first day of December in Rayong, Thailand, sunrise is at 06:21 and sunset at 17:47. On the last day of the month, sunrise is at 06:36 and sunset at 18:00 +07.

Average temperature in December
Rayong, Thailand

Average temperature in December - Rayong, Thailand
  • Average high temperature in December: 32°C

The warmest month (with the highest average high temperature) is April (34.3°C).
The months with the lowest average high temperature are January and September (31.9°C).

  • Average low temperature in December: 21.3°C

The month with the highest average low temperature is April (27.1°C).
The coldest month (with the lowest average low temperature) is December (21.3°C).

Average humidity in December
Rayong, Thailand

Average humidity in December - Rayong, Thailand
  • Average humidity in December: 70%

The months with the highest relative humidity are September and October (82%).
The month with the lowest relative humidity is December (70%).

Average rainfall in December
Rayong, Thailand

Average rainfall in December - Rayong, Thailand
  • Average rainfall in December: 5.9mm

The wettest month (with the highest rainfall) is September (255.2mm).
The driest month (with the least rainfall) is December (5.9mm).

Average rainfall days in December
Rayong, Thailand

Average rainfall days in December - Rayong, Thailand
  • Average rainfall days in December: 1 days

The month with the highest number of rainy days is September (17 days).
The month with the least rainy days is December (1 days).

Average sea temperature in December
Rayong, Thailand

Average sea temperature in December - Rayong, Thailand
  • Average sea temperature in December: 28.3°C

The best month for swimming (with the highest average sea temperature) is May (30.1°C).
The coldest month (with the lowest average sea temperature) is January (27.3°C).

Average daylight in December
Rayong, Thailand

Average daylight in December - Rayong, Thailand
  • Average daylight in December: 11h and 2min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

Rayong, Thailand

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