This report describes the typical weather at the Cozumel International Airport (Cozumel, Mexico) weather station over the course of an average October. It is based on the historical records from 1991 to 2012. Earlier records are either unavailable or unreliable.
Cozumel has a tropical monsoon climate with short dry season. The area within 25 mi of this station is covered by oceans and seas (69%) and forests (30%).
The month of October is characterized by gradually falling daily high temperatures, with daily highs around 87°F throughout the month, exceeding 91°F or dropping below 81°F only one day in ten.
Over the course of October, the length of the day is gradually decreasing. The shortest day of the month is October 31 with 11:23 hours of daylight; the longest day is October 1 with 11:56 hours of daylight.
The earliest sunrise is at 5:48am on October 29; the latest sunset is at 6:35pm on October 1; the latest sunrise is at 6:48am on October 27; the earliest sunset is at 5:13pm on October 31.
Daylight saving time (DST) ends at 1:00am on October 28, 2012, shifting sunrise and sunset to an hour earlier.
The median cloud cover ranges from 60% (partly cloudy) to 65% (partly cloudy). The trend is for the sky to be clearing with the median cloud cover decreasing by 6% from the start to the end of the month.
On October 16, a representative day, the sky is clear or mostly clear 7% of the time, partly cloudy 18% of the time, and mostly cloudy or overcast 22% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around October 1, occurring in 40% of days. Precipitation is least likely around October 31, occurring in 33% of days.
Throughout October, the most common forms of precipitation are moderate rain, light rain, and thunderstorms.
Moderate rain is the most severe precipitation observed during 40% of those days with precipitation. It is most likely around October 10, when it is observed during 16% of all days.
Light rain is the most severe precipitation observed during 38% of those days with precipitation. It is most likely around October 2, when it is observed during 15% of all days.
Thunderstorms are the most severe precipitation observed during 13% of those days with precipitation. They are most likely around October 1, when it is observed during 6% of all days.
Either snow is exceptionally unlikely to fall at this location in October or this station does not reliably report precipitation types.
The relative humidity typically ranges from 65% (mildly humid) to 95% (very humid) over the course of a typical October, rarely dropping below 57% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around October 30, at which time the relative humidity drops below 70% (mildly humid) three days out of four; it is most humid around October 2, rising above 92% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical October, the dew point typically varies from 70°F (muggy) to 78°F (oppressive) and is rarely below 65°F (mildy humid) or above 80°F (very oppressive).
Over the course of October typical wind speeds vary from 0 mph to 15 mph (calm to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around October 31, at which time the average daily maximum wind speed is 15 mph (moderate breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around October 2, at which time the average daily maximum wind speed is 13 mph (moderate breeze).