Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Port Arthur experiences an average high-temperature of a still hot 86.9°F (30.5°C) with the onset of September, subtly varied from August's 91°F (32.8°C). Port Arthur's nighttime temperature in September drops to an average of 74.1°F (23.4°C).Heat index
September's mean heat index is calculated to be a torrid 100.4°F (38°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.One should consider that heat index numbers are for shaded settings and light wind. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
In Port Arthur, Texas, the average relative humidity in September is 75%.Rainfall
In Port Arthur, in September, during 16.5 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, there are 132.6 rainfall days, and 12.09" (307mm) of precipitation is accumulated.Snowfall
January through November are months without snowfall.Daylight
In Port Arthur, the average length of the day in September is 12h and 20min.On the first day of September in Port Arthur, sunrise is at 6:53 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 7:02 pm CDT.
Sunshine
In September, the average sunshine in Port Arthur, Texas, is 9.5h.UV index
In Port Arthur, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 6 during September translates into the following directions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Port Arthur in September?
What is the average humidity in September in Port Arthur?
How many days does it rain in September in Port Arthur?
When it does not snow in Port Arthur?
How many hours of daylight does Port Arthur have in September?
When are sunrise and sunset in September in Port Arthur?
How many hours of sunshine does Port Arthur have in September?
How high is the UV index in September in Port Arthur?
Average temperature in September
Port Arthur, TX
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (59.5°F).
- Average low temperature in September: 74.1°F
The month with the highest average low temperature is July (78.4°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in September
Port Arthur, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Port Arthur, TX
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Port Arthur, TX
- Average humidity in September: 75%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Port Arthur, TX
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is August (2.09").
The driest month (with the least rainfall) is April (0.43").
Average rainfall days in September
Port Arthur, TX
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is August (17.9 days).
The months with the least rainy days are January and November (7.8 days).
Average snowfall in September
Port Arthur, TX
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Port Arthur, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Port Arthur, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Port Arthur, TX
- Average sunshine days in September: 10 days
The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is August (8.8 days).
Average UV index in September
Port Arthur, TX
- Average UV index in September: 6
The 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).
Average cloud cover in September
Port Arthur, TX
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 26).
Average visibility in September
Port Arthur, 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 Arthur, Texas, USA
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