August weather forecast
Port Isabel, TX

August, the last month of the summer in Port Isabel, is also a hot month, with an average temperature ranging between max 88°F (31.1°C) and min 82°F (27.8°C).

Temperature

The warmest month is August, with an average high-temperature of 88°F (31.1°C) and an average low-temperature of 82°F (27.8°C).

Heat index

The heat index for August is evaluated at a sweltering 102.2°F (39°C). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In Port Isabel, the average relative humidity in August is 75%.

Rainfall

In Port Isabel, in August, it is raining for 12.2 days, with typically 1.77" (45mm) of accumulated precipitation. Throughout the year, there are 143.2 rainfall days, and 21.38" (543mm) of precipitation is accumulated.

Ocean temperature

The month with the warmest seawater is August, with an average ocean temperature of 85.1°F (29.5°C).
Note: For engaging in water activities including swimming and diving, temperatures from 77°F (25°C) to 84.2°F (29°C) are perceived as perfect, providing pleasure for extended durations.

Daylight

In Port Isabel, the average length of the day in August is 13h and 2min.
On the first day of August, sunrise is at 6:55 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 7:49 pm CDT.

Sunshine

The average sunshine in August is 10.3h.

UV index

April through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 7 in August interprets into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be wary! Reflections from sand and water make UV radiation more intense.