Cozumel, Mexico: Annual Weather Averages
August is the hottest month in Cozumel with an average temperature of 28°C (82°F) and the coldest is January at 24°C (75°F) with the most daily sunshine hours at 11 in May. The wettest month is September with an average of 247mm of rain. The best month to swim in the sea is in August when the average sea temperature is 29°C (84°F).
Average Temperature: Cozumel
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 24 | 25 | 25 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 25 | 24 |
| °F | 75 | 77 | 77 | 81 | 81 | 81 | 81 | 82 | 81 | 81 | 77 | 75 |
Average High/Low Temperature: Cozumel
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 28 | 29 | 29 | 31 | 30 | 31 | 31 | 32 | 31 | 30 | 28 | 28 |
| Low °C | 20 | 20 | 20 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 20 |
| High °F | 82 | 84 | 84 | 88 | 86 | 88 | 88 | 90 | 88 | 86 | 82 | 82 |
| Low °F | 68 | 68 | 68 | 72 | 73 | 73 | 73 | 73 | 73 | 73 | 72 | 68 |
Average Day/Night Temperature: Cozumel
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day °C | 24 | 26 | 26 | 28 | 28 | 28 | 29 | 29 | 28 | 27 | 26 | 25 |
| Night °C | 21 | 22 | 23 | 25 | 25 | 26 | 25 | 26 | 25 | 25 | 23 | 22 |
| Day °F | 76 | 78 | 79 | 82 | 83 | 83 | 84 | 83 | 82 | 81 | 78 | 78 |
| Night °F | 70 | 71 | 73 | 76 | 77 | 78 | 78 | 78 | 77 | 76 | 73 | 72 |
Average Rainfall: Cozumel
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 49 | 13 | 30 | 31 | 12 | 70 | 192 | 162 | 247 | 182 | 91 | 36 |
| Days | 5 | 3 | 3 | 2 | 4 | 6 | 4 | 5 | 7 | 8 | 6 | 5 |
Average Daily Sunshine Hours: Cozumel
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hours | 7 | 8 | 10 | 10 | 11 | 10 | 10 | 10 | 9 | 8 | 8 | 8 |
Average Sea Temperature: Cozumel
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 27 | 26 | 26 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| °F | 81 | 79 | 79 | 81 | 82 | 82 | 82 | 84 | 84 | 84 | 82 | 81 |