September weather forecast and climate
Port O'Connor, TX

Weather in September

September, the first month of the autumn, in Port O'Connor, is still a hot month, with average temperature fluctuating between 76.1°F (24.5°C) and 86.9°F (30.5°C).

Temperature

In Port O'Connor, the average high-temperature is practically the same as in August - a still hot 86.9°F (30.5°C). The average low-temperature, in Port O'Connor, is 76.1°F (24.5°C).

Heat index

The average heat index in September is appraised at a very hot 99.3°F (37.4°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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', 'felt air temperature', 'real feel', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, differences in body mass, height, and shape, pregnancy, and wind affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. 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 surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In September, the average relative humidity is 74%.

Rainfall

The month with the most rainfall in Port O'Connor is September when the rain falls for 20 days and typically aggregates up to 4.25" (108mm) of precipitation.

Snowfall

February through December are months without snowfall.

Ocean temperature

In September, the average ocean temperature is 84.7°F (29.3°C).
Note: 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.

Daylight

In September, the average length of the day is 12.3h.

Sunshine

In September, the average sunshine in Port O'Connor is 8.5h.

UV index

In Port O'Connor, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in September in Port O'Connor?

In Port O'Connor, Texas, in September, the average high-temperature is 86.9°F (30.5°C), and the average low-temperature is 76.1°F (24.5°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is appraised at 99.3°F (37.4°C).

What is the average humidity in September in Port O'Connor?

The average relative humidity in September in Port O'Connor, Texas, is 74%.

What is the rainiest month in Port O'Connor?

September is the month with the most rainfall in Port O'Connor, Texas. Rain falls for 20 days and accumulates 4.25" (108mm) of precipitation.

How many days does it rain in September in Port O'Connor?

In Port O'Connor, during September, the rain falls for 20 days and regularly aggregates up to 4.25" (108mm) of precipitation.

When it does not snow in Port O'Connor?

February through December are months without snowfall in Port O'Connor, Texas.

What is the ocean temperature in September in Port O'Connor?

In Port O'Connor, Texas, the average seawater temperature in September is 84.7°F (29.3°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 Port O'Connor have in September?

In Port O'Connor, Texas, the average length of the day in September is 12.3h.

How many hours of sunshine does Port O'Connor have in September?

In Port O'Connor, Texas, the average sunshine in September is 8.5h.

What is the UV index reading in September in Port O'Connor?

In September, the average daily maximum UV index in Port O'Connor is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays.

Average temperature in September
Port O'Connor, TX

Average temperature in September - Port O
  • Average high temperature in September: 86.9°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 September: 76.1°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).

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Average pressure in September
Port O'Connor, TX

Average pressure in September - Port O
  • Average pressure in September: 29.93"

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

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Average wind speed in September
Port O'Connor, TX

Average wind speed in September - Port O
  • Average wind speed in September: 8.5mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is September (8.5mph).

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Average humidity in September
Port O'Connor, TX

Average humidity in September - Port O
  • Average humidity in September: 74%

Months with the highest relative humidity are February and March (79%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Port O'Connor, TX

Average rainfall in September - Port O
  • Average rainfall in September: 4.25"

The wettest month (with the highest rainfall) is September (4.25").
The driest month (with the least rainfall) is February (0.87").

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Average rainfall days in September
Port O'Connor, TX

Average rainfall days in September - Port O
  • Average rainfall days in September: 20 days

The month with the highest number of rainy days is September (20 days).
The month with the least rainy days is January (10.8 days).

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Average snowfall in September
Port O'Connor, TX

Average snowfall in September - Port O
  • Average snowfall in September: 0"

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

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Average snowfall days in September
Port O'Connor, TX

Average snowfall days in September - Port O
  • Average snowfall days in September: 0 days

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

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Average sea temperature in September
Port O'Connor, TX

Average sea temperature in September - Port O
  • Average sea temperature in September: 84.7°F

The best month for swimming (with the highest average sea temperature) is August (87°F).
The coldest months (with the lowest average sea temperature) are January and February (60.8°F).

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Average daylight in September /
Average sunshine in September
Port O'Connor, TX

Average daylight in September / Average sunshine in September - Port O
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.9h).
The month with the shortest days is December (Average daylight: 10.4h).

  • Average sunshine in September: 8.5h

The month with the most sunshine is July (Average sunshine: 10.9h).
The month with the least sunshine is December (Average sunshine: 4.7h).

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Average sunshine days in September
Port O'Connor, TX

Average sunshine days in September - Port O
  • Average sunshine days in September: 8.5 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).

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Average UV index in September
Port O'Connor, TX

Average UV index in September - Port O
  • Average UV index in September: 6

Months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
Port O'Connor, TX

Average cloud cover in September - Port O
  • Average cloud cover in September: 31

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

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Average visibility in September
Port O'Connor, TX

Average visibility in September - Port O
  • 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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