December weather forecast and climate
Cozumel, Mexico

A small blue boat, palm trees, and clear blue waters on Chen Rio white sandy beach in Cozumel, Mexico, with a small island
A small blue boat, palm trees, and clear blue waters on Chen Rio white sandy beach in Cozumel, Mexico, with a small island
The first month of the winter, December, is also a warm month in Cozumel, Mexico, with temperature in the range of an average high of 28.6°C (83.5°F) and an average low of 20.3°C (68.5°F).

Temperature

January and December, with an average high-temperature of 28.6°C (83.5°F), are the coldest months.

Humidity

In Cozumel, Mexico, the average relative humidity in December is 83%.

Rainfall

In December, the rain falls for 9.8 days. Throughout December, 106.8mm (4.2") of precipitation is accumulated. In Cozumel, during the entire year, the rain falls for 119.9 days and collects up to 1489.9mm (58.7") of precipitation.

Sea temperature

In Cozumel, the average seawater temperature in December 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.

Daylight

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

Sunshine

In Cozumel, the average sunshine in December is 6.2h.

UV index

January and December, with an average maximum UV index of 7, are months with the lowest UV index in Cozumel. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV radiation for average individuals.
The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the coldest month in Cozumel?

January and December, with an average high-temperature of 28.6°C (83.5°F), are the coldest months.

What is the temperature in December in Cozumel?

In December, in Cozumel, the average high-temperature is 28.6°C (83.5°F), and the average low-temperature is 20.3°C (68.5°F).

What is the average humidity in December in Cozumel?

In December, the average relative humidity in Cozumel is 83%.

How much does it rain in Cozumel in December?

In December, in Cozumel, Mexico, the rain falls for 9.8 days. Throughout December, 106.8mm (4.2") of precipitation is accumulated.

What is the sea water temperature in December in Cozumel?

In Cozumel, Mexico, the average seawater temperature in December is 27°C (80.6°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 Cozumel?

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

How many hours of daylight does Cozumel have in December?

The average length of the day in December in Cozumel is 10.9h.

How many hours of sunshine does Cozumel have in December?

In Cozumel, Mexico, the average sunshine in December is 6.2h.

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

Months with the lowest UV index in Cozumel, Mexico, are January and December, with an average maximum UV index of 7.

How high is the UV index in December in Cozumel?

The average daily maximum UV index in December in Cozumel, Mexico, is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays.
Average temperature in December - Cozumel, Mexico
  • Average high temperature in December: 28.6°C

The warmest month (with the highest average high temperature) is August (33°C).
Months with the lowest average high temperature are January and December (28.6°C).

  • Average low temperature in December: 20.3°C

The month with the highest average low temperature is June (23.8°C).
Coldest months (with the lowest average low temperature) are January and February (19.4°C).

Average humidity in December - Cozumel, Mexico
  • Average humidity in December: 83%

The month with the highest relative humidity is September (87%).
Months with the lowest relative humidity are March and April (79%).

Average rainfall in December - Cozumel, Mexico
  • Average rainfall in December: 106.8mm

The wettest month (with the highest rainfall) is October (242.5mm).
The driest month (with the lowest rainfall) is March (32.2mm).

Average rainfall days in December - Cozumel, Mexico
  • Average rainfall days in December: 9.8 days

The month with the highest number of rainy days is October (15.7 days).
The month with the lowest number of rainy days is April (3.7 days).

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

Best months for swimming (with the highest average sea temperature) are July, August, September and October (29°C).
Coldest months (with the lowest average sea temperature) are February and March (26°C).

Average daylight in December / Average sunshine in December - Cozumel, Mexico
  • Average daylight in December: 10.9h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in December: 6.2h

The month with most sunshine is April (Average sunshine: 8.6h).
Months with least sunshine are September and November (Average sunshine: 6.1).

Average UV index in December - Cozumel, Mexico
  • Average UV index in December: 7

Months with the highest UV index are April, May, June, July and August (UV index 12).
Months with the lowest UV index are January and December (UV index 7).

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