September weather forecast
Sinton, TX

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Weather in September

September, the first month of the autumn in Sinton, is still a hot month, with an average temperature fluctuating between 76.1°F (24.5°C) and 89.6°F (32°C).

Temperature

Sinton's average high-temperature in September is a still tropical 89.6°F (32°C), marking an insignificant difference from the 94.8°F (34.9°C) of August. Throughout the month of September, Sinton witnesses an average temperature of 76.1°F (24.5°C).

Heat index

September's mean heat index is estimated at a scorching 104°F (40°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'feels like', blends air temperature and moisture content to represent the felt temperature to humans. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to 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.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In Sinton, the average relative humidity in September is 70%.

Rainfall

The months with the most rainfall are September and October, with an average 1.5" (38mm) of precipitation.

Snowfall

In Sinton, Texas, snow does not fall in January, March through December.

Daylight

In Sinton, Texas, the average length of the day in September is 12h and 19min.
On the first day of September in Sinton, sunrise is at 7:08 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:16 pm CDT.

Sunshine

The average sunshine in September is 8.4h.

UV index

In September, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 7 during September translates into these guidelines:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in Sinton in September?

In September, the average high-temperature and low-temperature in Sinton are 89.6°F (32°C) and 76.1°F (24.5°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in September is estimated at 104°F (40°C).

What is the average humidity in September in Sinton?

The average relative humidity in September in Sinton is 70%.

What is the wettest month in Sinton?

The months with the most rainfall in Sinton, Texas, are September and October, with an average 1.5" (38mm) of precipitation.

How much does it rain in Sinton in September?

In Sinton, in September, it is raining for 12.4 days, with typically 1.5" (38mm) of accumulated precipitation.

When it does not snow in Sinton?

January, March through December are months without snowfall in Sinton.

What is the average length of the day in September in Sinton?

The average day length in September in Sinton, Texas, is 12h and 19min.

When are sunrise and sunset in September in Sinton?

On the first day of September in Sinton, sunrise is at 7:08 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:16 pm CDT.

How many hours of sunshine does Sinton have in September?

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

What is the UV index intensity in September in Sinton?

In Sinton, Texas, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability 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
Sinton, TX

Average temperature in September - Sinton, TX
  • Average high temperature in September: 89.6°F

The warmest month (with the highest average high temperature) is August (94.8°F).
The month with the lowest average high temperature is January (64°F).

  • Average low temperature in September: 76.1°F

The month with the highest average low temperature is August (79°F).
The coldest month (with the lowest average low temperature) is January (49.6°F).

Average pressure in September
Sinton, TX

Average pressure in September - Sinton, TX
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in September
Sinton, TX

Average wind speed in September - Sinton, TX
  • Average wind speed in September: 8.2mph

The windiest month (with the highest average wind speed) is May (11.1mph).
The calmest month (with the lowest average wind speed) is September (8.2mph).

Average humidity in September
Sinton, TX

Average humidity in September - Sinton, TX
  • Average humidity in September: 70%

The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is August (67%).

Average rainfall in September
Sinton, TX

Average rainfall in September - Sinton, TX
  • Average rainfall in September: 1.5"

The wettest months (with the highest rainfall) are September and October (1.5").
The driest month (with the least rainfall) is August (0.51").

Average rainfall days in September
Sinton, TX

Average rainfall days in September - Sinton, TX
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is September (12.4 days).
The month with the least rainy days is August (4.6 days).

Average snowfall in September
Sinton, TX

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

The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in September
Sinton, TX

Average snowfall days in September - Sinton, TX
  • Average snowfall days in September: 0 days

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

Average daylight in September /
Average sunshine in September
Sinton, TX

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

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).

Average sunshine days in September
Sinton, TX

Average sunshine days in September - Sinton, TX
  • Average sunshine days in September: 16 days

The month with the most sunshine days is August (25.1 days).
The month with the least sunshine days is April (15.6 days).

Average UV index in September
Sinton, TX

Average UV index in September - Sinton, TX
  • Average UV index in September: 7

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

Average cloud cover in September
Sinton, TX

Average cloud cover in September - Sinton, TX
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 22).

Average visibility in September
Sinton, TX

Average visibility in September - Sinton, 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).

Sinton, Texas, USA

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