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Cozumel Weather in September: Rain, Temperatures

Cozumel weather in September
Cozumel average high temperature and rainfall in September. © 2023 Scott S. Bateman

Cozumel weather in September has hot temperatures and much higher rainfall than usual.

These historical averages make it clear that going to Mexico’s largest island for vacation is a risky bet in September.

September is normally the most active month of the Caribbean hurricane season. The region averages three to four hurricanes in September with two that often become major hurricanes.

But heavy rains that often hit Cozumel during the month don’t stop some vacationers from going there.

Many of them either don’t know about the risk or do know about it and take advantage of last-minute vacations with a clear short-term weather forecast. Last-minute visitors are likely to find low prices at island resorts because it is the off season.

Rainfall in September

The historical average of 9.5 inches of rain in September is about the same amount the island normally has in October, according to Servicio Meteorológico Nacional, Mexico’s national meteorology service. October is the second worst month of the Cozumel hurricane season.

By comparison, the island averages less than two inches of rainfall in March and April during the dry season.

It rains an average of 15 days in September compared to 16 days in October. It rains only four days during a typical March or April.

Total rainfall in Cozumel during September is one of the highest in the Caribbean.

Temperatures in September

This video explains Caribbean weather in September and which islands are the best and worst to visit for weather.

Full-Screen Version | YouTube Caribbean Channel
Anyone who visits Cozumel during the month is likely to stay warm.

Cozumel temperatures in September have an average high of 89 degrees Fahrenheit or about 32 Celsius, according to Servicio Meteorológico Nacional. It is summer-like weather that begins in April every year. The first half of September is slightly warmer than the second half as fall weather begins to approach.

By comparison, daytime temperatures average in the low 80s Fahrenheit during the winter.

The average low temperature in September of 75 degrees Fahrenheit or 24 Celsius usually takes place at night. Seawater temperatures hover about midway between the daily highs and nighttime lows.

Cozumel weather in: January, February, March, April, May, June, July, August, September, October, November, December

Scott S. Bateman is a professional journalist who has traveled widely throughout the Caribbean and the Americas. He is the author of four books about cruising in the Caribbean, Alaska and Mexican Riviera.
August 15, 2023

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