Chiang Mai
Thailand
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Chiang Mai, Thailand

The stunning aerial panorama of the fantastic Two Pagoda on top of the Doi Inthanon mountain in Chiang Mai, Thailand
The stunning aerial panorama of the fantastic Two Pagoda on top of the Doi Inthanon mountain in Chiang Mai, Thailand
The first month of the winter, December, is also a moderately hot month in Chiang Mai, Thailand, with average temperature fluctuating between 28.6°C (83.5°F) and 15.7°C (60.3°F).

Temperature

December is the coldest month, with an average high-temperature of 28.6°C (83.5°F) and an average low-temperature of 15.7°C (60.3°F).

Heat index

In December, the average heat index is appraised at a hot 32.4°C (90.3°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like pregnancy, clothing, differences in body mass, height, and shape, and activity influence one's weather impression. 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 especially crucial for babies and toddlers. 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

In Chiang Mai, Thailand, the average relative humidity is 73%.

Rainfall

In Chiang Mai, Thailand, during 1 rainfall days, 15.9mm (0.6") of precipitation is typically accumulated. In Chiang Mai, Thailand, during the entire year, the rain falls for 113 days and collects up to 1130.6mm (44.5") of precipitation.

Daylight

With an average of 11h of daylight, December has the shortest days of the year in Chiang Mai, Thailand.

Sunshine

The average sunshine in Chiang Mai, Thailand, is 8.5h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 8. A UV Index estimate of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 8 translate into the following recommendations:
Take special precautions, as unprotected eyes and skin can be burned and damaged 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.

What is the coldest month in Chiang Mai?

The coldest month in Chiang Mai is December, with an average high-temperature of 28.6°C (83.5°F) and an average low-temperature of 15.7°C (60.3°F).

What is the temperature in December in Chiang Mai?

In Chiang Mai, in December, the average high-temperature is 28.6°C (83.5°F), and the average low-temperature is 15.7°C (60.3°F). In December, the average heat index (a.k.a. 'real feel', 'feels like'), that factores the actual air temperature with the relative humidity, is calculated to 32.4°C (90.3°F).

What is the average humidity in December in Chiang Mai?

The average relative humidity in December in Chiang Mai is 73%.

How many days does it rain in December in Chiang Mai?

In Chiang Mai, during December, the rain falls for 1 days and regularly aggregates up to 15.9mm (0.6") of precipitation.

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

The month with the shortest days in Chiang Mai is December, with an average of 11h of daylight.

How many hours of daylight does Chiang Mai have in December?

In Chiang Mai, the average length of the day in December is 11h.

How long on average sun shines in December in Chiang Mai?

In December, the average sunshine in Chiang Mai is 8.5h.

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

With an average maximum UV index of 8, December is the month with the lowest UV index.

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

In Chiang Mai, the average daily maximum UV index in December is 8. A UV Index value of 8 to 10 symbolizes a very high health threat from the exposure to the Sun's UV radiation.
Average temperature in December - Chiang Mai, Thailand
  • Average high temperature in December: 28.6°C

The warmest month (with the highest average high temperature) is April (36.5°C).
The month with the lowest average high temperature is December (28.6°C).

  • Average low temperature in December: 15.7°C

The month with the highest average low temperature is June (24°C).
The coldest month (with the lowest average low temperature) is January (14.9°C).

Average humidity in December - Chiang Mai, Thailand
  • Average humidity in December: 73%

Months with the highest relative humidity are August and September (81%).
The month with the lowest relative humidity is March (52%).

Average rainfall in December - Chiang Mai, Thailand
  • Average rainfall in December: 15.9mm

The wettest month (with the highest rainfall) is August (216.9mm).
The driest month (with the lowest rainfall) is January (4.2mm).

Average rainfall days in December - Chiang Mai, Thailand
  • Average rainfall days in December: 1 days

The month with the highest number of rainy days is September (20 days).
Months with the lowest number of rainy days are January and December (1 days).

Average daylight in December / Average sunshine in December - Chiang Mai, Thailand
  • Average daylight in December: 11h

The month with the longest days is June (Average daylight: 13.3h).
The month with shortest days is December (Average daylight: 11h).

  • Average sunshine in December: 8.5h

The month with most sunshine is February (Average sunshine: 9h).
Months with least sunshine are August and September (Average sunshine: 5.2).

Average UV index in December - Chiang Mai, Thailand
  • Average UV index in December: 8

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 8).