Climate Insights for Cozumel

The climate in Cozumel is hot. The average annual temperature is 27°C and approximately 1191mm of precipitation falls per year. Cozumel receives a notable amount of rainfall throughout the year, including during its driest month. Cozumel is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, July. The coldest months are January, February, December, when temperatures can drop to 24°C.

Cozumel has relatively stable temperatures year-round, staying within a 5°C range. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 24°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

Cozumel is a moderately rainy area, receiving approximately 1191mm of precipitation annually, which averages out to around 99mm per month. The wettest month is June, averaging 219mm of rainfall. October and September also tend to see above-average precipitation. The driest month is March, with just 30mm. That's 189mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Cozumel is mildly breezy, with an average annual wind speed of 20km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 23km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in September, with average winds dropping to 15km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 8km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 22km/h in winter, 22km/h in spring, 18km/h in summer, 17km/h in autumn.

It is currently summer in Cozumel, which began on June 21, 2026. Cozumel is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 29°C, while the coldest stretch bottoms out in January near 24°C. Autumn is next, beginning on September 23, 2026 (3 days from now).

The best time to visit Cozumel is during January, when the weather is most comfortable for travellers. During these months, average temperatures hover around 25°C with modest rainfall averaging 71mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 29°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Cozumel based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.