December weather forecast
Tulum, Mexico

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Rocks, trees, sandy beach, and clear waters surrounding the God of Winds Temple in Tulum, Mexico
Rocks, trees, sandy beach, and clear waters surrounding the God of Winds Temple in Tulum, Mexico

Weather in December

Rounding up the year, December weather in Tulum comes with a further decline in temperatures and rainfall, laying the groundwork for the upcoming dry season. Daylight decreases to 10.9 hours, the lowest for the year, and average wind speed picks up slightly to 11.4km/h (7.1mph). The combination of reduced rainfall and cooler average temperatures make it particularly pleasant for exploring Tulum's varied natural and architectural wonders. As Christmas approaches, the town glows with warmth and merriment, creating a festive atmosphere that thoroughly complements the overall weather conditions.

Temperature

Stepping into December, Tulum records an average high-temperature of a still warm 27.6°C (81.7°F), almost consistent with November. Tulum's average low-temperature in December is measured at an agreeable 22.2°C (72°F).

Heat index

December's heat index is appraised at a tropical 31°C (87.8°F). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.
When assessing, remember that heat index measurements are for light winds and shaded spots. With 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 'felt air temperature' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In December, the rain falls for 18.5 days. Throughout December, 47mm (1.85") of precipitation is accumulated. Throughout the year, in Tulum, Mexico, there are 210.8 rainfall days, and 810mm (31.89") of precipitation is accumulated.

Sea temperature

In Tulum, the average seawater temperature in December is 27°C (80.6°F).
Note: With water temperature from 25°C (77°F) to 29°C (84.2°F), all water activities are comfortable and delightful, devoid of discomfort even for lengthened periods.

Daylight

The month with the shortest days in Tulum is December, with an average of 10h and 54min of daylight.
On the first day of the month, sunrise is at 7:09 am and sunset at 6:08 pm. On the last day of December, in Tulum, sunrise is at 7:25 am and sunset at 6:21 pm EST.

Sunshine

The average sunshine in December is 8.4h.

UV index

The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A maximum high daily UV index of 6 during December translates into the following directions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Caution! Sand and water reflections can notably increase the UV radiation intensity.
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Frequently asked questions

What is the temperature in December in Tulum?

During December, Tulum experiences an average high-temperature of 27.6°C (81.7°F) and a low-temperature of 22.2°C (72°F). In December, the average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, is appraised at 31°C (87.8°F).

What is the average humidity in December in Tulum?

The average relative humidity in December is 78%.

How many days does it rain in December in Tulum?

In December, in Tulum, Mexico, the rain falls for 18.5 days. Throughout December, 47mm (1.85") of precipitation is accumulated.

What is the water temperature in December in Tulum?

In December, the average sea temperature in Tulum, Mexico, is 27°C (80.6°F). 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.

What is the month with the shortest days in Tulum?

With an average of 10h and 54min of daylight, December has the shortest days of the year in Tulum, Mexico.

How many hours of daylight does Tulum have in December?

In December, the average day length in Tulum is 10h and 56min.

When is the sunrise / sunset in December in Tulum?

On the first day of December in Tulum, sunrise is at 7:09 am and sunset at 6:08 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 6:21 pm EST.

How many hours of sunshine does Tulum have in December?

In Tulum, the average sunshine duration in December is 8.4h.

What are the months with the lowest UV index in Tulum?

January, February, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Tulum.

How high is the UV index in December in Tulum?

The average daily maximum UV index in December in Tulum is 6. A UV Index reading of 6 to 7 represents a high health threat from exposure to Sun's UV rays.

Average temperature in December
Tulum, Mexico

Average temperature in December - Tulum, Mexico
  • Average high temperature in December: 27.6°C

The warmest month (with the highest average high temperature) is August (31.8°C).
The month with the lowest average high temperature is January (26.7°C).

  • Average low temperature in December: 22.2°C

The month with the highest average low temperature is August (26°C).
The coldest month (with the lowest average low temperature) is January (20.8°C).

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Average pressure in December
Tulum, Mexico

Average pressure in December - Tulum, Mexico
  • Average pressure in December: 1016.3mbar

The month with the highest atmospheric pressure is January (1017.4mbar).
The month with the lowest atmospheric pressure is September (1012.3mbar).

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Average wind speed in December
Tulum, Mexico

Average wind speed in December - Tulum, Mexico
  • Average wind speed in December: 11.4km/h

The windiest month (with the highest average wind speed) is March (13.1km/h).
The calmest month (with the lowest average wind speed) is September (10km/h).

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Average humidity in December
Tulum, Mexico

Average humidity in December - Tulum, Mexico
  • Average humidity in December: 78%

The months with the highest relative humidity are June and October (80%).
The month with the lowest relative humidity is March (73%).

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Average rainfall in December
Tulum, Mexico

Average rainfall in December - Tulum, Mexico
  • Average rainfall in December: 47mm

The wettest month (with the highest rainfall) is June (139mm).
The driest month (with the least rainfall) is March (21mm).

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Average rainfall days in December
Tulum, Mexico

Average rainfall days in December - Tulum, Mexico
  • Average rainfall days in December: 18.5 days

The month with the highest number of rainy days is September (23.2 days).
The month with the least rainy days is April (11.3 days).

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Average sea temperature in December
Tulum, Mexico

Average sea temperature in December - Tulum, Mexico
  • Average sea temperature in December: 27°C

The best months for swimming (with the highest average sea temperature) are August, September and October (29°C).
The coldest months (with the lowest average sea temperature) are January, February and March (26°C).

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Average daylight in December /
Average sunshine in December
Tulum, Mexico

Average daylight in December / Average sunshine in December - Tulum, Mexico
  • Average daylight in December: 10h and 5min

The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 10h and 54min).

  • Average sunshine in December: 8h and 2min

The months with the most sunshine are July and August (Average sunshine: 9h and 12min).
The month with the least sunshine is January (Average sunshine: 7h and 54min).

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Average sunshine days in December
Tulum, Mexico

Average sunshine days in December - Tulum, Mexico
  • Average sunshine days in December: 7.3 days

The month with the most sunshine days is April (15.8 days).
The month with the least sunshine days is September (4.8 days).

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Average UV index in December
Tulum, Mexico

Average UV index in December - Tulum, Mexico
  • Average UV index in December: 6

The months with the highest UV index are March, April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, October, November and December (UV index 6).

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Average cloud cover in December
Tulum, Mexico

Average cloud cover in December - Tulum, Mexico
  • Average cloud cover in December: 35

The month with the most cloud cover is June (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 27).

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Average visibility in December
Tulum, Mexico

Average visibility in December - Tulum, Mexico
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, November and December (10km).
The month with the lowest visibility is October (9km).

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Tulum, Mexico

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