September weather forecast
La Porte, TX

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Weather in September

September, the first month of the autumn in La Porte, is still a tropical month, with an average temperature varying between 86.5°F (30.3°C) and 75.2°F (24°C).

Temperature

As La Porte transitions from August to September, the average high-temperatures adjust to a still hot 86.5°F (30.3°C), nearly the same as the previous 91.6°F (33.1°C). During the month of September, the temperature falls to an average of 75.2°F (24°C).

Heat index

September's mean heat index is evaluated at a very hot 98.6°F (37°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. 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 extremely significant for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In September, the average relative humidity in La Porte is 75%.

Rainfall

The month with the most rainfall is September, when the rain falls for 17.4 days and typically aggregates up to 1.93" (49mm) of precipitation.

Snowfall

January, February and September are months with snowfall. September is the first month it typically snows. Throughout September, there are 0.1 snowfall days. In La Porte, Texas, during the entire year, snow falls for 0.4 days.

Daylight

The average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 6:57 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:13 am and sunset at 7:06 pm CDT.

Sunshine

In La Porte, the average sunshine in September is 8.8h.

UV index

The average daily maximum UV index in September in La Porte is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 6 during September translates into the following guidance:
Guard oneself from overexposure. Defence against sun injury is vital. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
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Frequently asked questions

How hot is it in La Porte in September?

An average high-temperature, in September, in La Porte, is 86.5°F (30.3°C) and the average low-temperature is 75.2°F (24°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is evaluated at 98.6°F (37°C).

What is the average humidity in September in La Porte?

In La Porte, Texas, the average relative humidity in September is 75%.

What is the wettest month in La Porte?

September is the month with the most rainfall in La Porte, Texas. Rain falls for 17.4 days and accumulates 1.93" (49mm) of precipitation.

How much does it rain in La Porte in September?

In September, in La Porte, Texas, the rain falls for 17.4 days. Throughout September, 1.93" (49mm) of precipitation is accumulated.

When does it start to snow in La Porte?

September is the first month it typically snows in La Porte, Texas. Throughout September, there are 0.1 snowfall days.

What is the average length of the day in September in La Porte?

In La Porte, the average day length in September is 12h and 20min.

When is the sunrise / sunset in September in La Porte?

On the first day of September, sunrise is at 6:57 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:06 pm CDT.

How long on average sun shines in September in La Porte?

In La Porte, Texas, the average sunshine duration in September is 8.8h.

What is the UV index reading in September in La Porte?

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
La Porte, TX

Average temperature in September - La Porte, TX
  • Average high temperature in September: 86.5°F

The warmest month (with the highest average high temperature) is August (91.6°F).
The month with the lowest average high temperature is January (60.3°F).

  • Average low temperature in September: 75.2°F

The month with the highest average low temperature is August (79.2°F).
The coldest month (with the lowest average low temperature) is January (47.7°F).

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Average pressure in September
La Porte, TX

Average pressure in September - La Porte, 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).

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Average wind speed in September
La Porte, TX

Average wind speed in September - La Porte, TX
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest months (with the lowest average wind speed) are August and September (7.1mph).

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Average humidity in September
La Porte, TX

Average humidity in September - La Porte, TX
  • Average humidity in September: 75%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in September
La Porte, TX

Average rainfall in September - La Porte, TX
  • Average rainfall in September: 1.93"

The wettest month (with the highest rainfall) is September (1.93").
The driest months (with the least rainfall) are February and March (0.47").

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Average rainfall days in September
La Porte, TX

Average rainfall days in September - La Porte, TX
  • Average rainfall days in September: 17.4 days

The month with the highest number of rainy days is September (17.4 days).
The months with the least rainy days are January and February (7.7 days).

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Average snowfall days in September
La Porte, TX

Average snowfall days in September - La Porte, TX
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, October, November and December (0 days).

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Average daylight in September /
Average sunshine in September
La Porte, TX

Average daylight in September / Average sunshine in September - La Porte, 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: 8h and 5min

The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

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Average sunshine days in September
La Porte, TX

Average sunshine days in September - La Porte, TX
  • Average sunshine days in September: 10.6 days

The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is September (10.6 days).

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Average UV index in September
La Porte, TX

Average UV index in September - La Porte, 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).

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Average cloud cover in September
La Porte, TX

Average cloud cover in September - La Porte, TX
  • Average cloud cover in September: 29

The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 26).

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Average visibility in September
La Porte, TX

Average visibility in September - La Porte, 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).

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La Porte, Texas, USA

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