January 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
January, like December, in Cozumel, Mexico, is a moderately hot winter month, with average temperature ranging between max 28.6°C (83.5°F) and min 19.4°C (66.9°F).

Temperature

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

Heat index

In January, the average heat index is calculated to a tropical 34°C (93.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, metabolic differences, 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. 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

The average relative humidity in Cozumel is 82%.

Rainfall

In Cozumel, during 8.7 rainfall days, 81.4mm (3.2") of precipitation is typically accumulated. In Cozumel, during the entire year, the rain falls for 119.9 days and collects up to 1489.9mm (58.66") of precipitation.

Sea temperature

In January, the average sea temperature is 27°C (80.6°F).
Note: 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

In January, the average length of the day is 11.1h.

Sunshine

The average sunshine in Cozumel is 6.4h.

UV index

Months with the lowest UV index are January and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 7 in January interpret into the following advice:
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. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What are the coldest months 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 January in Cozumel?

In Cozumel, in January, the average high-temperature is 28.6°C (83.5°F), and the average low-temperature is 19.4°C (66.9°F). In January, the average heat index (a.k.a. 'felt air temperature', 'real feel'), that takes the relative humidity and factores it into the air temperature reading, is appraised at 34°C (93.2°F).

What is the average humidity in January in Cozumel?

In January, the average relative humidity in Cozumel, Mexico, is 82%.

How many days does it rain in January in Cozumel?

In January, in Cozumel, the rain falls for 8.7 days. Throughout January, 81.4mm (3.2") of precipitation is accumulated.

What is the water temperature in January in Cozumel?

In January, the average sea temperature in Cozumel 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.

How many hours of daylight does Cozumel have in January?

In January, the average length of the day is 11.1h.

How many hours of sunshine does Cozumel have in January?

The average sunshine in January in Cozumel, Mexico, is 6.4h.

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.

What is the UV index intensity in January in Cozumel?

In Cozumel, Mexico, the average daily maximum UV index in January 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 January - Cozumel, Mexico
  • Average high temperature in January: 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 January: 19.4°C

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

Average humidity in January - Cozumel, Mexico
  • Average humidity in January: 82%

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

Average rainfall in January - Cozumel, Mexico
  • Average rainfall in January: 81.4mm

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

Average rainfall days in January - Cozumel, Mexico
  • Average rainfall days in January: 8.7 days

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

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

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

Average daylight in January / Average sunshine in January - Cozumel, Mexico
  • Average daylight in January: 11.1h

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

  • Average sunshine in January: 6.4h

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

Average UV index in January - Cozumel, Mexico
  • Average UV index in January: 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).