September weather forecast
Alief, TX

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Weather in September

September, the first month of the autumn in Alief, is also a hot month, with an average temperature varying between 72.1°F (22.3°C) and 88°F (31.1°C).

Temperature

A mild drop in Alief's average high-temperature is observed in September, transitioning from 93.7°F (34.3°C) in August to a still tropical 88°F (31.1°C). Alief's average low-temperature for the month of September records at an agreeable 72.1°F (22.3°C).

Heat index

The heat index value for September is evaluated at a scorching 104°F (40°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Factoring in the heat index, values are geared towards shaded areas with light breezes. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. 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.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In Alief, the average relative humidity in September is 76%.

Rainfall

September is the month with the most rainfall. Rain falls for 19.7 days and accumulates 4.49" (114mm) of precipitation.

Snowfall

In Alief, snow does not fall in March through November.

Daylight

The average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 7:00 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:08 pm CDT.

Sunshine

The average sunshine in September is 8.4h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, a regular UV index of 6 translates into these guidelines:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in September?

In September, the average high-temperature and low-temperature are 88°F (31.1°C) and 72.1°F (22.3°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in September is evaluated at 104°F (40°C).

What is the average humidity in September?

In Alief, the average relative humidity in September is 76%.

What is the rainiest month?

The month with the most rainfall is September, when the rain falls for 19.7 days and typically aggregates up to 4.49" (114mm) of precipitation.

How much does it rain in September?

In Alief, in September, during 19.7 rainfall days, 4.49" (114mm) of precipitation is typically accumulated.

When it does not snow?

In Alief, snow does not fall in March through November.

How many hours of daylight does Alief have in September?

In Alief, Texas, the average day length in September is 12h and 20min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 7:00 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:08 pm CDT.

How many hours of sunshine does Alief have in September?

In Alief, the average sunshine duration in September is 8.4h.

How high is the UV index in September?

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

Average temperature in September
Alief, TX

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

The warmest month (with the highest average high temperature) is August (93.7°F).
The month with the lowest average high temperature is January (61.3°F).

  • Average low temperature in September: 72.1°F

The month with the highest average low temperature is August (76.5°F).
The coldest month (with the lowest average low temperature) is January (45.9°F).

Average pressure in September
Alief, TX

Average pressure in September - Alief, 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
Alief, TX

Average wind speed in September - Alief, TX
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is September (5.7mph).

Average humidity in September
Alief, TX

Average humidity in September - Alief, TX
  • Average humidity in September: 76%

The months with the highest relative humidity are February and March (78%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Alief, TX

Average rainfall in September - Alief, TX
  • Average rainfall in September: 4.49"

The wettest month (with the highest rainfall) is September (4.49").
The driest month (with the least rainfall) is February (1.69").

Average rainfall days in September
Alief, TX

Average rainfall days in September - Alief, TX
  • Average rainfall days in September: 19.7 days

The month with the highest number of rainy days is September (19.7 days).
The month with the least rainy days is January (11.4 days).

Average snowfall in September
Alief, TX

Average snowfall in September - Alief, TX
  • Average snowfall in September: 0"

The month with the highest snowfall is December (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

Average snowfall days in September
Alief, TX

Average snowfall days in September - Alief, 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
Alief, TX

Average daylight in September / Average sunshine in September - Alief, 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 2min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

Average sunshine days in September
Alief, TX

Average sunshine days in September - Alief, TX
  • Average sunshine days in September: 8.1 days

The month with the most sunshine days is January (17.5 days).
The month with the least sunshine days is September (8.1 days).

Average UV index in September
Alief, TX

Average UV index in September - Alief, 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
Alief, TX

Average cloud cover in September - Alief, TX
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are August and October (Cloud cover 29).

Average visibility in September
Alief, TX

Average visibility in September - Alief, TX
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

Alief, Texas, USA

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