Cozumel, Mexico - Detailed climate information and monthly weather forecast

A small blue boat, palm trees, and clear blue waters on Chen Rio white sandy beach in Cozumel, Mexico, with a small island

The best months for a swim in Cozumel, Mexico, are March and April, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.

January, the same as December, is another warm winter month in Cozumel, Mexico, with temperature in the range of an average low of 19.4°C (66.9°F) and an average high of 28.6°C (83.5°F). January and December, with an average high-temperature of 28.6°C (83.5°F), are the coldest months. In January, the average heat index is estimated at a hot 34°C (93.2°F). Weather in January »

February, the last month of the winter, in Cozumel, is another warm month, with average temperature fluctuating between 19.4°C (66.9°F) and 29.1°C (84.4°F). In February, the average high-temperature is almost the same as in January - a still warm 29.1°C (84.4°F). Weather in February »

The first month of the spring, March, is a hot month in Cozumel, Mexico, with average temperature fluctuating between 20.7°C (69.3°F) and 30.9°C (87.6°F). The perfect water temperature of 26°C (78.8°F) with 32.2mm (1.27") of accumulated rainfall and only 4 rainfall days, makes March a great period for swimming and other water activities. Weather in March »

April, like March, is another tropical spring month in Cozumel, Mexico, with average temperature fluctuating between 32°C (89.6°F) and 21.8°C (71.2°F). The ideal sea water temperature of 27°C (80.6°F) and only 3.7 rainfall days, with 44.8mm (1.76") of accumulated rainfall, makes April the best time for swimming and other water activities. Weather in April »

May, the last month of the spring, in Cozumel, is another hot month, with average temperature fluctuating between 22.9°C (73.2°F) and 32.7°C (90.9°F). In May, the average high-temperature is almost the same as in April - a still tropical 32.7°C (90.9°F). Weather in May »

The first month of the summer, June, is also a hot month in Cozumel, Mexico, with average temperature varying between 23.8°C (74.8°F) and 32.4°C (90.3°F). In Cozumel, the average high-temperature in June is practically the same as in May - a still hot 32.4°C (90.3°F). Weather in June »

July, like June, is a hot summer month in Cozumel, Mexico, with average temperature fluctuating between 23.5°C (74.3°F) and 32.6°C (90.7°F). In July, the average high-temperature is relatively the same as in June - a still tropical 32.6°C (90.7°F). Weather in July »

The last month of the summer, August, is another tropical month in Cozumel, Mexico, with average temperature ranging between min 23.5°C (74.3°F) and max 33°C (91.4°F). August is the warmest month, with an average high-temperature of 33°C (91.4°F) and an average low-temperature of 23.5°C (74.3°F). In August, the average heat index is evaluated at a life-threatening hot 50.2°C (122.4°F). Weather in August »

The first month of the autumn, September, is also a hot month in Cozumel, Mexico, with temperature in the range of an average high of 31.9°C (89.4°F) and an average low of 23.6°C (74.5°F). In Cozumel, the average high-temperature in September is practically the same as in August - a still tropical 31.9°C (89.4°F). Weather in September »

October, like September, is another hot autumn month in Cozumel, Mexico, with temperature in the range of an average low of 23.1°C (73.6°F) and an average high of 30.7°C (87.3°F). In October, the average high-temperature is almost the same as in September - a still hot 30.7°C (87.3°F). Weather in October »

November, the last month of the autumn, in Cozumel, is another warm month, with average temperature ranging between max 29.7°C (85.5°F) and min 21.7°C (71.1°F). In November, the average high-temperature is relatively the same as in October - a moderately hot 29.7°C (85.5°F). Weather in November »

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). January and December, with an average high-temperature of 28.6°C (83.5°F), are the coldest months. The average heat index is calculated to a tropical 34.2°C (93.6°F). Weather in December »

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What is the coldest month in Cozumel?

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

How many days does it rain in Cozumel?

Throughout the year, there are 119.9 rainfall days, and 1489.9mm (58.66") of precipitation is accumulated.

What is the month with 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, Mexico.

When is the sea coldest in Cozumel?

February and March, with an average sea temperature of 26°C (78.8°F), are months with the coldest seawater in Cozumel.

What is the least humid month in Cozumel?

March and April, with an average relative humidity of 79%, are the least humid months in Cozumel.

What is the driest month in Cozumel?

March is the month with the least rainfall in Cozumel. Rain falls for 4 days and accumulates 32.2mm (1.27") of precipitation.

What month has the most sunshine in Cozumel?

April has the most sunshine of the year in Cozumel, with an average of 8.6h of sunshine.

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

Months with the highest UV index in Cozumel, Mexico, are April through August, with an average maximum UV index of 12.

When are the longest days in Cozumel?

With an average of 13.4h of daylight, June has the longest days of the year.

What months are the sea warmest in Cozumel?

Months with the warmest seawater in Cozumel, Mexico, are July through October, with an average sea temperature of 29°C (84.2°F).

What is the warmest month in Cozumel?

The warmest month in Cozumel, Mexico, is August, with an average high-temperature of 33°C (91.4°F) and an average low-temperature of 23.5°C (74.3°F).

What is the most humid month in Cozumel?

September is the most humid month, with an average relative humidity of 87%.

What is the month with the least sunshine in Cozumel?

September and November, with an average of 6.1h of sunshine, are months with the least sunshine in Cozumel.

What is the rainiest month in Cozumel?

October is the month with the most rainfall in Cozumel, Mexico. Rain falls for 15.7 days and accumulates 242.5mm (9.55") of precipitation.

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.

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Long-term

Climate J F M A M J J A S O N D Year

Average high temperature in January:
28.6°C
Average high temperature in February:
29.1°C
Average high temperature in March:
30.9°C
Average high temperature in April:
32°C
Average high temperature in May:
32.7°C
Average high temperature in June:
32.4°C

Average high temperature in July:
32.6°C
Average high temperature in August:
33°C
Average high temperature in September:
31.9°C
Average high temperature in October:
30.7°C
Average high temperature in November:
29.7°C
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 January:
19.4°C
Average low temperature in February:
19.4°C
Average low temperature in March:
20.7°C
Average low temperature in April:
21.8°C
Average low temperature in May:
22.9°C
Average low temperature in June:
23.8°C

Average low temperature in July:
23.5°C
Average low temperature in August:
23.5°C
Average low temperature in September:
23.6°C
Average low temperature in October:
23.1°C
Average low temperature in November:
21.7°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).

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

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

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Average rainfall days in January:
8.7 days
Average rainfall days in February:
6.5 days
Average rainfall days in March:
4 days
Average rainfall days in April:
3.7 days
Average rainfall days in May:
7.2 days
Average rainfall days in June:
12.6 days

Average rainfall days in July:
11.8 days
Average rainfall days in August:
13.4 days
Average rainfall days in September:
15.4 days
Average rainfall days in October:
15.7 days
Average rainfall days in November:
11.1 days
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).

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Average sea temperature - Cozumel, Mexico

Average sea temperature in January:
27°C
Average sea temperature in February:
26°C
Average sea temperature in March:
26°C
Average sea temperature in April:
27°C
Average sea temperature in May:
28°C
Average sea temperature in June:
28°C

Average sea temperature in July:
29°C
Average sea temperature in August:
29°C
Average sea temperature in September:
29°C
Average sea temperature in October:
29°C
Average sea temperature in November:
28°C
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).

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Average daylight / Average sunshine - Cozumel, Mexico

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

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

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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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Monthly weather forecast and climate
Cozumel, Mexico

Contents

The best time to visit Cozumel

Weather in January

Weather in February

Weather in March

Weather in April

Weather in May

Weather in June

Weather in July

Weather in August

Weather in September

Weather in October

Weather in November

Weather in December