This report describes the typical weather at the Port Isabel Airport (Los Fresnos, Texas, United States) weather station over the course of an average year. It is based on the historical records from 2001 to 2012. Earlier records are either unavailable or unreliable.
Los Fresnos, Texas 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 (47%), oceans and seas (39%), croplands (5%), marshes (3%), and lakes and rivers (3%).
Over the course of a year, the temperature typically varies from 53Â°F to 93Â°F and is rarely below 44Â°F or above 96Â°F.
The warm season lasts from May 26 to September 25 with an average daily high temperature above 88Â°F. The hottest day of the year is August 14, with an average high of 93Â°F and low of 79Â°F.
The cold season lasts from November 30 to February 23 with an average daily high temperature below 73Â°F. The coldest day of the year is January 3, with an average low of 53Â°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 10:30 hours of daylight; the longest day is June 20 with 13:47 hours of daylight.
The earliest sunrise is at 6:36am on June 6 and the latest sunset is at 8:26pm on July 4. The latest sunrise is at 7:42am on March 11 and the earliest sunset is at 5:37pm on November 28.
Daylight savings 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 4% (clear) to 57% (partly cloudy). The sky is cloudiest on February 10 and clearest on August 8. The clearer part of the year begins around May 3. The cloudier part of the year begins around December 1.
On August 8, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 87% of the time, and overcast or mostly cloudy 7% of the time.
On February 10, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 47% of the time, and clear or mostly clear 39% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around September 16, occurring in 37% of days. Precipitation is least likely around May 13, occurring in 14% of days.
Over the entire year, the most common forms of precipitation are light rain, thunderstorms, moderate rain, and heavy rain.
Light rain is the most severe precipitation observed during 47% of those days with precipitation. It is most likely around February 10, when it is observed during 20% of all days.
Thunderstorms are the most severe precipitation observed during 25% of those days with precipitation. They are most likely around August 24, when it is observed during 15% of all days.
Moderate rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around September 14, when it is observed during 6% of all days.
Heavy rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around September 13, when it is observed during 7% of all days.
During the warm season, which lasts from May 26 to September 25, there is a 26% 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 (41% of days with precipitation have at worst thunderstorms), light rain (28%), heavy rain (19%), and moderate rain (11%).
During the cold season, which lasts from November 30 to February 23, there is a 26% 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 light rain (68% of days with precipitation have at worst light rain), moderate rain (18%), heavy rain (7%), and thunderstorms (6%).
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 53% (mildly humid) to 93% (very humid) over the course of the year, rarely dropping below 34% (comfortable) and reaching as high as 100% (very humid).
The air is driest around August 17, at which time the relative humidity drops below 57% (mildly humid) three days out of four; it is most humid around January 8, exceeding 91% (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 46Â°F (dry) to 78Â°F (oppressive) and is rarely below 32Â°F (dry) or above 80Â°F (oppressive).
There are two periods in the year that are most comfortable: The first is between January 1 and March 16 and the second is between November 21 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 22 mph (calm to fresh breeze), rarely exceeding 28 mph (strong breeze).
The highest average wind speed of 15 mph (moderate breeze) occurs around May 3, at which time the average daily maximum wind speed is 22 mph (fresh breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around September 7, at which time the average daily maximum wind speed is 16 mph (moderate breeze).