August weather forecast
Port Lavaca, TX

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Weather in August

August, the last month of the summer in Port Lavaca, is another tropical month, with an average temperature ranging between min 79.3°F (26.3°C) and max 90.7°F (32.6°C).

Temperature

August, with its average high-temperature of 90.7°F (32.6°C) and an average low-temperature of 79.3°F (26.3°C), holds the record as the warmest month.

Heat index

August's mean heat index is evaluated at a scorching 109.4°F (43°C). Keep on guard: Heat exhaustion and heat cramps are probable. Heatstroke is a possible danger with ongoing physical activity.
Understanding the heat index involves considering values for shaded locales with light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in August is 73%.

Rainfall

In August, the rain falls for 14 days. Throughout August, 2.4" (61mm) of precipitation is accumulated. Throughout the year, there are 156.8 rainfall days, and 23.5" (597mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall.

Ocean temperature

With an average ocean temperature of 86.7°F (30.4°C), August is the month with the warmest seawater.
Note: The allure of a refreshing swim can be decreased in waters that exceed 86°F (30°C).

Daylight

In August, the average length of the day is 13h and 8min.
On the first day of the month, sunrise is at 6:48 am and sunset at 8:17 pm. On the last day of August, sunrise is at 7:04 am and sunset at 7:48 pm CDT.

Sunshine

The average sunshine in August in Port Lavaca, Texas, is 10.3h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: During August, 7 as the daily maximum UV index converts into the following advice:
Shun overexposure. Protection from sun ravages is indispensable. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be wary! Reflections from sand and water make UV radiation more intense.
Updated: Jul 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the hottest?

August, with average temperatures reaching a high of 90.7°F (32.6°C) and a low of 79.3°F (26.3°C), is the warmest month.

How hot does it get in August?

In Port Lavaca, 90.7°F (32.6°C) is the average high-temperature and 79.3°F (26.3°C) is the average low-temperature during August. In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is evaluated at 109.4°F (43°C).

What is the average humidity in August?

The average relative humidity in August is 73%.

How much does it rain in Port Lavaca in August?

In August, the rain falls for 14 days. Throughout August, 2.4" (61mm) of precipitation is accumulated.

When it does not snow?

February through December are months without snowfall.

When is the ocean warmest?

The month with the warmest seawater is August, with an average ocean temperature of 86.7°F (30.4°C).

What is the ocean temperature in August?

In Port Lavaca, the average seawater temperature in August is 86.7°F (30.4°C). The water temperature above 86°F (30°C) is arguably regarded as unpleasant. The primary purpose of entering the water - cooling down from sunshine and high temperatures - is lost.

What is the average length of the day in August?

In Port Lavaca, the average day length in August is 13h and 8min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:48 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 7:48 pm CDT.

How many hours of sunshine does Port Lavaca have in August?

The average sunshine duration in August in Port Lavaca is 10.3h.

What are the months with the highest UV index?

The months with the highest UV index are May through August, with an average maximum UV index of 7.

What is the UV index intensity in August?

In Port Lavaca, the average daily maximum UV index in August is 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Port Lavaca, TX

Average temperature in August - Port Lavaca, TX
  • Average high temperature in August: 90.7°F

The warmest month (with the highest average high temperature) is August (90.7°F).
The month with the lowest average high temperature is January (62.2°F).

  • Average low temperature in August: 79.3°F

The month with the highest average low temperature is August (79.3°F).
The coldest month (with the lowest average low temperature) is January (49.6°F).

Average pressure in August
Port Lavaca, TX

Average pressure in August - Port Lavaca, TX
  • Average pressure in August: 29.93"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in August
Port Lavaca, TX

Average wind speed in August - Port Lavaca, TX
  • Average wind speed in August: 8.8mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is September (8.3mph).

Average humidity in August
Port Lavaca, TX

Average humidity in August - Port Lavaca, TX
  • Average humidity in August: 73%

The months with the highest relative humidity are February and March (79%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Port Lavaca, TX

Average rainfall in August - Port Lavaca, TX
  • Average rainfall in August: 2.4"

The wettest month (with the highest rainfall) is September (3.35").
The driest month (with the least rainfall) is February (0.87").

Average rainfall days in August
Port Lavaca, TX

Average rainfall days in August - Port Lavaca, TX
  • Average rainfall days in August: 14 days

The month with the highest number of rainy days is September (19.8 days).
The month with the least rainy days is January (10.8 days).

Average snowfall in August
Port Lavaca, TX

Average snowfall in August - Port Lavaca, TX
  • Average snowfall in August: 0"

The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in August
Port Lavaca, TX

Average snowfall days in August - Port Lavaca, TX
  • Average snowfall days in August: 0 days

The months with the highest number of snowfall days are January and December (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).

Average sea temperature in August
Port Lavaca, TX

Average sea temperature in August - Port Lavaca, TX
  • Average sea temperature in August: 86.7°F

The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (60.1°F).

Average daylight in August /
Average sunshine in August
Port Lavaca, TX

Average daylight in August / Average sunshine in August - Port Lavaca, TX
  • Average daylight in August: 13h and 1min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).

Average sunshine days in August
Port Lavaca, TX

Average sunshine days in August - Port Lavaca, TX
  • Average sunshine days in August: 12 days

The month with the most sunshine days is January (17.5 days).
The month with the least sunshine days is September (8.5 days).

Average UV index in August
Port Lavaca, TX

Average UV index in August - Port Lavaca, TX
  • Average UV index in August: 7

The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).

Average cloud cover in August
Port Lavaca, TX

Average cloud cover in August - Port Lavaca, TX
  • Average cloud cover in August: 25

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 25).

Average visibility in August
Port Lavaca, TX

Average visibility in August - Port Lavaca, TX
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Port Lavaca, Texas, USA

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