September weather forecast and climate
Laguna Vista, TX

Weather in September

The first month of the autumn, September, is still a tropical month in Laguna Vista, Texas, with average temperature varying between 88°F (31.1°C) and 79.5°F (26.4°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still hot 88°F (31.1°C). In September, in Laguna Vista, the average low-temperature is 79.5°F (26.4°C).

Heat index

The average heat index in September is evaluated at a torrid 101.3°F (38.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, differences in body mass, height, and shape, 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 particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Laguna Vista, the average relative humidity is 72%.

Rainfall

The month with the most rainfall in Laguna Vista is September when the rain falls for 16.6 days and typically aggregates up to 2.36" (60mm) of precipitation.

Snowfall

In Laguna Vista snow does not fall in January, March through December.

Ocean temperature

In Laguna Vista, Texas,, the average water temperature is 84.6°F (29.2°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Laguna Vista, Texas, the average length of the day is 12.3h.

Sunshine

In September, the average sunshine in Laguna Vista is 9h.

UV index

April through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in September in Laguna Vista?

In Laguna Vista, in September, the average high-temperature is 88°F (31.1°C), and the average low-temperature is 79.5°F (26.4°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is evaluated at 101.3°F (38.5°C).

What is the average humidity in September in Laguna Vista?

In Laguna Vista, Texas, the average relative humidity in September is 72%.

What is the wettest month in Laguna Vista?

The month with the most rainfall is September when the rain falls for 16.6 days and typically aggregates up to 2.36" (60mm) of precipitation.

How many days does it rain in September in Laguna Vista?

In Laguna Vista, Texas, in September, during 16.6 rainfall days, 2.36" (60mm) of precipitation is typically accumulated.

When it does not snow in Laguna Vista?

January, March through December are months without snowfall.

How warm is the water in September in Laguna Vista?

In September, the average ocean temperature in Laguna Vista is 84.6°F (29.2°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Laguna Vista have in September?

In September, the average length of the day in Laguna Vista, Texas, is 12.3h.

How many hours of sunshine does Laguna Vista have in September?

The average sunshine in September in Laguna Vista, Texas, is 9h.

What is the month with the highest UV index in Laguna Vista?

April through September, with an average maximum UV index of 7, are months with the highest UV index.

How high is the UV index in September in Laguna Vista?

In September, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in September
Laguna Vista, TX

Average temperature in September - Laguna Vista, TX
  • Average high temperature in September: 88°F

The warmest month (with the highest average high temperature) is August (90.9°F).
The month with the lowest average high temperature is January (67.6°F).

  • Average low temperature in September: 79.5°F

The month with the highest average low temperature is August (80.8°F).
The coldest month (with the lowest average low temperature) is January (57.7°F).

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Average pressure in September
Laguna Vista, TX

Average pressure in September - Laguna Vista, TX
  • Average pressure in September: 29.91"

The month with the highest atmospheric pressure is January (30.11").
Months with the lowest atmospheric pressure are May and June (29.88").

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Average wind speed in September
Laguna Vista, TX

Average wind speed in September - Laguna Vista, TX
  • Average wind speed in September: 9.9mph

The windiest months (with the highest average wind speed) are March and April (13.2mph).
The calmest month (with the lowest average wind speed) is September (9.9mph).

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Average humidity in September
Laguna Vista, TX

Average humidity in September - Laguna Vista, TX
  • Average humidity in September: 72%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in September
Laguna Vista, TX

Average rainfall in September - Laguna Vista, TX
  • Average rainfall in September: 2.36"

The wettest month (with the highest rainfall) is September (2.36").
The driest month (with the least rainfall) is April (0.39").

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Average rainfall days in September
Laguna Vista, TX

Average rainfall days in September - Laguna Vista, TX
  • Average rainfall days in September: 16.6 days

The month with the highest number of rainy days is September (16.6 days).
The month with the least rainy days is February (7.7 days).

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Average snowfall days in September
Laguna Vista, TX

Average snowfall days in September - Laguna Vista, TX
  • Average snowfall days in September: 0 days

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

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Average sea temperature in September
Laguna Vista, TX

Average sea temperature in September - Laguna Vista, TX
  • Average sea temperature in September: 84.6°F

The best month for swimming (with the highest average sea temperature) is August (85.1°F).
The coldest month (with the lowest average sea temperature) is February (66.7°F).

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Average daylight in September /
Average sunshine in September
Laguna Vista, TX

Average daylight in September / Average sunshine in September - Laguna Vista, TX
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.8h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in September: 9h

The month with the most sunshine is July (Average sunshine: 11.4h).
The month with the least sunshine is December (Average sunshine: 4.9h).

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Average sunshine days in September
Laguna Vista, TX

Average sunshine days in September - Laguna Vista, TX
  • Average sunshine days in September: 10.2 days

The month with the most sunshine days is March (21.7 days).
The month with the least sunshine days is September (10.2 days).

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Average UV index in September
Laguna Vista, TX

Average UV index in September - Laguna Vista, TX
  • Average UV index in September: 7

Months with the highest UV index are April, May, June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 4).

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Average cloud cover in September
Laguna Vista, TX

Average cloud cover in September - Laguna Vista, TX
  • Average cloud cover in September: 29

The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 19).

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Average visibility in September
Laguna Vista, TX

Average visibility in September - Laguna Vista, TX
  • Average visibility in September: 6mi

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

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