This report describes the typical weather at the General Servando Canales International Airport (Matamoros, 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.
Matamoros has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by grasslands (77%), marshes (9%), lakes and rivers (9%), and oceans and seas (4%).
The month of April is characterized by rising daily high temperatures, with daily highs increasing from 82°F to 87°F over the course of the month, exceeding 92°F or dropping below 75°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 12:26 hours of daylight; the longest day is April 30 with 13:07 hours of daylight.
The earliest sunrise is at 6:54am on April 30; the latest sunset is at 8:01pm on April 29; the latest sunrise is at 7:21am on April 1; the earliest sunset is at 7:47pm on April 1.
Daylight saving time is observed in 2012 but it neither starts nor ends in April, so the entire month is in daylight time.
The median cloud cover is 75% (partly cloudy) and does not vary substantially over the course of the month.
On April 15, a representative day, the sky is clear or mostly clear 13% of the time, partly cloudy 7% of the time, and mostly cloudy or overcast 38% of the time.
The average probability that some form of precipitation will be observed in a given day is 16%, with little variation over the course of the month.
Throughout April, the most common forms of precipitation are moderate rain, drizzle, thunderstorms, and light rain.
Moderate rain is the most severe precipitation observed during 36% of those days with precipitation. It is most likely around April 10, when it is observed during 6% of all days.
Drizzle is the most severe precipitation observed during 25% of those days with precipitation. It is most likely around April 1, when it is observed during 6% of all days.
Thunderstorms are the most severe precipitation observed during 23% of those days with precipitation. They are most likely around April 30, when it is observed during 5% of all days.
Light rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around April 2, 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 56% (mildly humid) to 95% (very humid) over the course of a typical April, rarely dropping below 40% (comfortable) and reaching as high as 100% (very humid).
The air is driest around April 20, at which time the relative humidity drops below 63% (mildly humid) three days out of four; it is most humid around April 29, 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 April, the dew point typically varies from 61°F (comfortable) to 74°F (very muggy) and is rarely below 49°F (dry) or above 77°F (oppressive).
Over the course of April typical wind speeds vary from 3 mph to 19 mph (light breeze to fresh breeze), rarely exceeding 23 mph (fresh breeze).
The highest average wind speed of 12 mph (gentle breeze) occurs around April 30, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 10 mph (gentle breeze) occurs around April 4, at which time the average daily maximum wind speed is 19 mph (fresh breeze).