This report describes the typical weather at the Cozumel International Airport (Cozumel, Mexico) weather station over the course of an average April. 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 April is characterized by gradually rising daily high temperatures, with daily highs around 87°F throughout the month, exceeding 91°F or dropping below 82°F only one day in ten.
Over the course of April, the length of the day is gradually increasing. The shortest day of the month is April 1 with 12:22 hours of daylight; the longest day is April 30 with 12:53 hours of daylight.
The earliest sunrise is at 6:18am on April 30; the latest sunset is at 7:12pm on April 29; the latest sunrise is at 6:41am on April 1; the earliest sunset is at 7:03pm on April 1.
Daylight saving time (DST) starts at 3:00am on April 1, 2012, shifting sunrise and sunset to an hour later.
The median cloud cover ranges from 50% (partly cloudy) to 55% (partly cloudy).
On April 15, a representative day, the sky is clear or mostly clear 12% of the time, partly cloudy 22% of the time, and mostly cloudy or overcast 18% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around April 30, occurring in 17% of days. Precipitation is least likely around April 9, occurring in 12% of days.
Throughout April, the most common forms of precipitation are light rain, moderate rain, and drizzle.
Light rain is the most severe precipitation observed during 55% of those days with precipitation. It is most likely around April 30, when it is observed during 9% of all days.
Moderate rain is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around April 29, when it is observed during 4% of all days.
Drizzle is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around April 22, when it is observed during 2% of all days.
Either snow is exceptionally unlikely to fall at this location in April or this station does not reliably report precipitation types.
The relative humidity typically ranges from 58% (mildly humid) to 90% (very humid) over the course of a typical April, rarely dropping below 50% (comfortable) and reaching as high as 99% (very humid).
The air is driest around April 14, at which time the relative humidity drops below 63% (mildly humid) three days out of four; it is most humid around April 8, rising above 84% (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 April, the dew point typically varies from 67°F (muggy) to 74°F (very muggy) and is rarely below 61°F (comfortable) or above 78°F (oppressive).
Over the course of April typical wind speeds vary from 0 mph to 17 mph (calm to moderate breeze), rarely exceeding 24 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around April 30, at which time the average daily maximum wind speed is 17 mph (moderate breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around April 2, at which time the average daily maximum wind speed is 17 mph (moderate breeze).