Chiang Rai
Thailand
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Chiang Rai, Thailand

The White Temple of Wat Rong Khun with a waterfront fishpond in Chiang Rai, Thailand, on a beautiful cloudy day panorama
The White Temple of Wat Rong Khun with a waterfront fishpond in Chiang Rai, Thailand, on a beautiful cloudy day panorama
The first month of the winter, December, is still a warm month in Chiang Rai, Thailand, with temperature in the range of an average low of 13.5°C (56.3°F) and an average high of 27.2°C (81°F).

Temperature

The coldest month is December, with an average high-temperature of 27.2°C (81°F) and an average low-temperature of 13.5°C (56.3°F).

Heat index

In December, the average heat index is calculated to 29.9°C (85.8°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, differences in body mass, height, and shape, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In December, the average relative humidity is 77%.

Rainfall

In Chiang Rai, during December, the rain falls for 3 days and regularly aggregates up to 14mm (0.6") of precipitation. Throughout the year, in Chiang Rai, there are 137 rainfall days, and 1690.5mm (66.6") of precipitation is accumulated.

Daylight

With an average of 10.9h of daylight, December has the shortest days of the year.

Sunshine

The average sunshine in Chiang Rai is 7h.

UV index

The month with the lowest UV index in Chiang Rai, Thailand, is December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to the UV radiation for the average person.
Note: In December, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun 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.

What is the coldest month in Chiang Rai?

December is the coldest month in Chiang Rai, Thailand, with an average high-temperature of 27.2°C (81°F) and an average low-temperature of 13.5°C (56.3°F).

What is the temperature in December in Chiang Rai?

The average high-temperature, in December, in Chiang Rai, is 27.2°C (81°F), while the average low-temperature is 13.5°C (56.3°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that represents influence of the relative humidity to air temperaure, in December is evaluated at 29.9°C (85.8°F).

What is the average humidity in December in Chiang Rai?

In Chiang Rai, Thailand, the average relative humidity in December is 77%.

How much does it rain in Chiang Rai in December?

In Chiang Rai, Thailand, in December, during 3 rainfall days, 14mm (0.6") of precipitation is typically accumulated.

What is the month with the shortest days in Chiang Rai?

The month with the shortest days in Chiang Rai, Thailand, is December, with an average of 10.9h of daylight.

What is the average length of the day in December in Chiang Rai?

In Chiang Rai, the average length of the day in December is 10.9h.

How many hours of sunshine does Chiang Rai have in December?

In December, the average sunshine in Chiang Rai is 7h.

What is the month with the lowest UV index in Chiang Rai?

With an average maximum UV index of 7, December is the month with the lowest UV index.

How high is the UV index in December in Chiang Rai?

In Chiang Rai, Thailand, the average daily maximum UV index in December is 7. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.
Average temperature in December - Chiang Rai, Thailand
  • Average high temperature in December: 27.2°C

The warmest month (with the highest average high temperature) is April (34.8°C).
The month with the lowest average high temperature is December (27.2°C).

  • Average low temperature in December: 13.5°C

The month with the highest average low temperature is June (23.6°C).
The coldest month (with the lowest average low temperature) is January (12.8°C).

Average humidity in December - Chiang Rai, Thailand
  • Average humidity in December: 77%

The month with the highest relative humidity is August (84%).
The month with the lowest relative humidity is March (62%).

Average rainfall in December - Chiang Rai, Thailand
  • Average rainfall in December: 14mm

The wettest month (with the highest rainfall) is August (358.4mm).
The driest month (with the lowest rainfall) is January (7.5mm).

Average rainfall days in December - Chiang Rai, Thailand
  • Average rainfall days in December: 3 days

The month with the highest number of rainy days is August (24 days).
The month with the lowest number of rainy days is February (1 days).

Average daylight in December / Average sunshine in December - Chiang Rai, Thailand
  • Average daylight in December: 10.9h

The month with the longest days is June (Average daylight: 13.3h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in December: 7h

The month with most sunshine is February (Average sunshine: 9h).
Months with least sunshine are June, July and August (Average sunshine: 5).

Average UV index in December - Chiang Rai, Thailand
  • Average UV index in December: 7

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).