Cozumel
Mexico
Long-term weather forecast
Long-term weather forecast

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 still a warm month in Cozumel, Mexico, with average temperature ranging between max 28.6°C (83.5°F) and min 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, the average relative humidity is 83%.

Rainfall

In Cozumel, Mexico, it is raining for 9.8 days, with typically 106.8mm (4.2") of accumulated precipitation. In Cozumel, Mexico, 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, in December, the average water temperature is 27°C (80.6°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

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

Sunshine

The average sunshine in December is 6.2h.

UV index

Months with the lowest UV index in Cozumel, Mexico, are January and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to the UV radiation for the ordinary person.
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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the coldest month in Cozumel?

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

What is the temperature in December in Cozumel?

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

What is the average humidity in December in Cozumel?

The average relative humidity in December in Cozumel, Mexico, 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 December, the average sea temperature in Cozumel, Mexico, is 27°C (80.6°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in Cozumel?

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

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

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

How long on average sun shines in December in Cozumel?

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

When is the lowest UV index in Cozumel?

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

What is the UV index reading in December in Cozumel?

In December, the average daily maximum UV index in Cozumel is 7. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV radiation.
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).