Weather in Cozumel in September 2025
- September is usually the hottest month of the year in Cozumel;
- September is usually the wettest month of the year in Cozumel;
Average weather
Average temperature in Cozumel in September
The expected average maximum temperature in September is +90°F with a maximum of +91°F and a minimum of +77°F.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +91°F to +91°F.
Is Cozumel warm or cold in September?
Cozumel is typically warm in September.
Maximum temperatures go up compared to the previous month from +84°F to +84°F. The minimum temperature also goes up from +81°F to +81°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is the hottest month in Cozumel, here is the comparison with other months:
Climate in Cozumel in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +84°F | +84°F | +82°F | ||||
| Min. temperature | ||||||
| +68°F | +68°F | +72°F | ||||
| Max. temperature | ||||||
| +93°F | +95°F | +91°F | ||||
| Rainfall | ||||||
| 122 mm | 188 mm | 206 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 4 m/s | ||||
| Humidity | ||||||
| 82% | 83% | 82% | ||||
| Air pressure | ||||||
| 1013 HPa | 1011 HPa | 1012 HPa | ||||
| Sunny days | ||||||
| 2 | 1 | 2 | ||||
| Cloudy days | ||||||
| 4 | 2 | 3 | ||||
| Rainy days | ||||||
| 24 | 26 | 25 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. The temperature levels stay the same in the area of +84°F for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 122 mm to 188 mm. Humidity rises from 82% to 83%. The average wind speed doesn’t change much during September, staying around 3 m/s. The days becoming less sunny, going from 2 sunny days in August to 1 in September.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Cozumel is gradually increasing during September, going from 3 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Cozumel?
Climate Change Over the Years
The climate in Cozumel in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1984 (+80°F) and the highest in 2023 (+87°F). The driest year was 2004 with only 723 mm of rainfall, and the wettest year was 1983 with 2095 mm.
FAQ
Is September a good time to visit Cozumel?
Can you sunbathe in Cozumel in September?
Is Cozumel rainy in September?
Is it sunny in Cozumel in September?
Other cities in Mexico
Monthly weather in Cozumel
Source of the data
For this page, we’ve looked at the typical weather in Cozumel, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
