September weather forecast
Sugar Land, TX

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Weather in September

The first month of the autumn, September, is still a hot month in Sugar Land, Texas, with an average temperature fluctuating between 88°F (31.1°C) and 72.1°F (22.3°C).

Temperature

With the commencement of September, Sugar Land records a moderate temperature decline, with the average high easing from August's hot 93.7°F (34.3°C) to a still tropical 88°F (31.1°C). During the month of September, the temperature falls to an average of 72.1°F (22.3°C).

Heat index

The average heat index in September is evaluated at a scorching 104°F (40°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. 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 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. 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 relevant to babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In September, the average relative humidity 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 Sugar Land, Texas, snow does not fall in March through November.

Daylight

In September, the average length of the day in Sugar Land, Texas, 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

In Sugar Land, Texas, the average sunshine in September is 8.4h.

UV index

The average daily maximum UV index in September in Sugar Land, Texas, is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the UV index of 6 transforms into the following advice:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

How hot is it in Sugar Land in September?

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

What is the average humidity in September in Sugar Land?

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

What is the rainiest month in Sugar Land?

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

How much does it rain in Sugar Land in September?

In Sugar Land, Texas, during September, the rain falls for 19.7 days and regularly aggregates up to 4.49" (114mm) of precipitation.

When it does not snow in Sugar Land?

In Sugar Land, snow does not fall in March through November.

What is the average length of the day in September in Sugar Land?

In Sugar Land, the average day length in September is 12h and 20min.

What time are sunrise and sunset in September in Sugar Land?

On the first day of September in Sugar Land, Texas, 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 Sugar Land have in September?

The average sunshine duration in September is 8.4h.

What is the UV index reading in September in Sugar Land?

The average daily maximum UV index in September in Sugar Land is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unsafe exposure to Sun's UV rays.
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
Sugar Land, TX

Average temperature in September - Sugar Land, 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).

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Average pressure in September
Sugar Land, TX

Average pressure in September - Sugar Land, 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
Sugar Land, TX

Average wind speed in September - Sugar Land, 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).

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Average humidity in September
Sugar Land, TX

Average humidity in September - Sugar Land, 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%).

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Average rainfall in September
Sugar Land, TX

Average rainfall in September - Sugar Land, 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").

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Average rainfall days in September
Sugar Land, TX

Average rainfall days in September - Sugar Land, 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).

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Average snowfall in September
Sugar Land, TX

Average snowfall in September - Sugar Land, 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").

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Average snowfall days in September
Sugar Land, TX

Average snowfall days in September - Sugar Land, 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).

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Average daylight in September /
Average sunshine in September
Sugar Land, TX

Average daylight in September / Average sunshine in September - Sugar Land, 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).

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Average sunshine days in September
Sugar Land, TX

Average sunshine days in September - Sugar Land, 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).

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Average UV index in September
Sugar Land, TX

Average UV index in September - Sugar Land, 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
Sugar Land, TX

Average cloud cover in September - Sugar Land, 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).

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Average visibility in September
Sugar Land, TX

Average visibility in September - Sugar Land, 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).

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Sugar Land, Texas, USA

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