Climate Insights for Cozumel

The climate in Cozumel is hot. The average annual temperature is 27°C and approximately 1200mm of precipitation falls per year. October is the wettest month, receiving around 231mm of rainfall. 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 23°C.

Cozumel has relatively stable temperatures year-round, staying within a 6°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 23°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

Cozumel is a fairly wet location, receiving approximately 1200mm of precipitation annually, which averages out to around 100mm per month. The wettest month is October, averaging 231mm of rainfall. June and September also tend to see above-average precipitation. The driest month is March, with just 29mm. That's 202mm less than October, 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 relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

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 23°C. Autumn is next, beginning on September 23, 2026 — 91 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 24°C with modest rainfall averaging 70mm 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.