September weather forecast
Port Mansfield, TX

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Weather in September

September, the first month of the autumn in Port Mansfield, is still a hot month, with an average temperature ranging between max 90.5°F (32.5°C) and min 77.7°F (25.4°C).

Temperature

Port Mansfield indicates an average high-temperature of a hot 90.5°F (32.5°C) in September, showing minor variation from August's 95.5°F (35.3°C). Port Mansfield records an average low-temperature of 77.7°F (25.4°C) throughout the month of September.

Heat index

The heat index value during September is estimated at a blisteringly hot 105.8°F (41°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

In September, the average relative humidity in Port Mansfield is 68%.

Rainfall

September is the month with the most rainfall in Port Mansfield. Rain falls for 16.9 days and accumulates 2.72" (69mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 18min.
On the first day of September, sunrise is at 7:09 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:16 pm CDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In Port Mansfield, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in Port Mansfield in September?

The high-temperature, in September, in Port Mansfield, is 90.5°F (32.5°C), while the low-temperature averages to 77.7°F (25.4°C). The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 105.8°F (41°C).

What is the average humidity in September in Port Mansfield?

In September, the average relative humidity in Port Mansfield, Texas, is 68%.

What is the wettest month in Port Mansfield?

September is the month with the most rainfall. Rain falls for 16.9 days and accumulates 2.72" (69mm) of precipitation.

How many days does it rain in September in Port Mansfield?

In Port Mansfield, Texas, during September, the rain falls for 16.9 days and regularly aggregates up to 2.72" (69mm) of precipitation.

What is the average length of the day in September in Port Mansfield?

In Port Mansfield, Texas, the average day length in September is 12h and 18min.

When is the sunrise / sunset in September in Port Mansfield?

On the first day of September, sunrise is at 7:09 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:16 pm CDT.

How long on average sun shines in September in Port Mansfield?

In Port Mansfield, Texas, the average sunshine duration in September is 8.6h.

What is the UV index intensity in September in Port Mansfield?

The average daily maximum UV index in September in Port Mansfield, Texas, is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Port Mansfield, TX

Average temperature in September - Port Mansfield, TX
  • Average high temperature in September: 90.5°F

The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (68.5°F).

  • Average low temperature in September: 77.7°F

The month with the highest average low temperature is August (79.5°F).
The coldest month (with the lowest average low temperature) is January (54.1°F).

Average pressure in September
Port Mansfield, TX

Average pressure in September - Port Mansfield, TX
  • Average pressure in September: 29.91"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in September
Port Mansfield, TX

Average wind speed in September - Port Mansfield, TX
  • Average wind speed in September: 9mph

The windiest months (with the highest average wind speed) are April and May (11.9mph).
The calmest month (with the lowest average wind speed) is September (9mph).

Average humidity in September
Port Mansfield, TX

Average humidity in September - Port Mansfield, TX
  • Average humidity in September: 68%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (65%).

Average rainfall in September
Port Mansfield, TX

Average rainfall in September - Port Mansfield, TX
  • Average rainfall in September: 2.72"

The wettest month (with the highest rainfall) is September (2.72").
The driest month (with the least rainfall) is February (0.59").

Average rainfall days in September
Port Mansfield, TX

Average rainfall days in September - Port Mansfield, TX
  • Average rainfall days in September: 16.9 days

The month with the highest number of rainy days is September (16.9 days).
The month with the least rainy days is July (7.4 days).

Average daylight in September /
Average sunshine in September
Port Mansfield, TX

Average daylight in September / Average sunshine in September - Port Mansfield, TX
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

Average sunshine days in September
Port Mansfield, TX

Average sunshine days in September - Port Mansfield, TX
  • Average sunshine days in September: 11.1 days

The month with the most sunshine days is July (22.1 days).
The month with the least sunshine days is September (11.1 days).

Average UV index in September
Port Mansfield, TX

Average UV index in September - Port Mansfield, TX
  • Average UV index in September: 7

The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 4).

Average cloud cover in September
Port Mansfield, TX

Average cloud cover in September - Port Mansfield, TX
  • Average cloud cover in September: 31

The month with the most cloud cover is December (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 18).

Average visibility in September
Port Mansfield, TX

Average visibility in September - Port Mansfield, TX
  • Average visibility in September: 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 Mansfield, Texas, USA

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