This report describes the typical weather at the General Servando Canales International Airport (Matamoros, Mexico) weather station over the course of an average year. 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%).
Over the course of a year, the temperature typically varies from 54Â°F to 95Â°F and is rarely below 42Â°F or above 97Â°F.
The warm season lasts from May 21 to September 25 with an average daily high temperature above 90Â°F. The hottest day of the year is August 3, with an average high of 95Â°F and low of 79Â°F.
The cold season lasts from December 2 to February 15 with an average daily high temperature below 75Â°F. The coldest day of the year is January 3, with an average low of 54Â°F and high of 70Â°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 10:32 hours of daylight; the longest day is June 20 with 13:44 hours of daylight.
The earliest sunrise is at 6:38am on June 11 and the latest sunset is at 8:26pm on June 30. The latest sunrise is at 7:43am on March 11 and the earliest sunset is at 5:38pm on November 30.
Daylight saving time (DST) is observed in this location during 2012, starting in the spring on March 11 and ending in the fall on November 4.
The median cloud cover ranges from 51% (partly cloudy) to 83% (mostly cloudy). The sky is cloudiest on January 22 and clearest on July 14. The clearer part of the year begins around May 28. The cloudier part of the year begins around November 29.
On July 14, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 25% of the time, and overcast or mostly cloudy 29% of the time.
On January 22, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 43% of the time, and clear or mostly clear 14% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around September 21, occurring in 27% of days. Precipitation is least likely around May 6, occurring in 15% of days.
Over the entire year, the most common forms of precipitation are moderate rain, drizzle, thunderstorms, and light rain.
Moderate rain is the most severe precipitation observed during 31% of those days with precipitation. It is most likely around September 25, when it is observed during 8% of all days.
Drizzle is the most severe precipitation observed during 24% of those days with precipitation. It is most likely around December 5, when it is observed during 11% of all days.
Thunderstorms are the most severe precipitation observed during 22% of those days with precipitation. They are most likely around September 9, when it is observed during 10% of all days.
Light rain is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around September 15, when it is observed during 6% of all days.
During the warm season, which lasts from May 21 to September 25, there is a 20% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (39% of days with precipitation have at worst thunderstorms), moderate rain (28%), light rain (24%), and drizzle (6%).
During the cold season, which lasts from December 2 to February 15, there is a 21% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of drizzle (42% of days with precipitation have at worst drizzle), moderate rain (32%), and light rain (22%).
Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.
The relative humidity typically ranges from 52% (mildly humid) to 96% (very humid) over the course of the year, rarely dropping below 36% (comfortable) and reaching as high as 100% (very humid).
The air is driest around August 10, at which time the relative humidity drops below 56% (mildly humid) three days out of four; it is most humid around September 12, exceeding 94% (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 year, the dew point typically varies from 49Â°F (dry) to 79Â°F (oppressive) and is rarely below 34Â°F (dry) or above 81Â°F (very oppressive).
There are two periods in the year that are most comfortable: The first is between January 1 and March 14 and the second is between November 24 and December 31. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 0 mph to 19 mph (calm to fresh breeze), rarely exceeding 24 mph (fresh breeze).
The highest average wind speed of 12 mph (gentle breeze) occurs around May 1, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around September 6, at which time the average daily maximum wind speed is 16 mph (moderate breeze).