September weather forecast
Surfside Beach, TX

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Weather in September

The first month of the autumn, September, is still a warm month in Surfside Beach, Texas, with an average temperature fluctuating between 85.5°F (29.7°C) and 77.2°F (25.1°C).

Temperature

As September unfolds, the average high-temperature reaches a warm 85.5°F (29.7°C), hinting at a slight fluctuation from the previous month. Throughout the nights in September, Surfside Beach notes an average low of 77.2°F (25.1°C), a small dip from the daytime peak.

Heat index

Throughout September, the heat index is appraised at a fiery hot 95°F (35°C). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. 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. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The average relative humidity in September is 75%.

Rainfall

September is the month with the most rainfall in Surfside Beach. Rain falls for 18.7 days and accumulates 3.58" (91mm) of precipitation.

Snowfall

February through December are months without snowfall.

Daylight

In Surfside Beach, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 6:59 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:07 pm CDT.

Sunshine

In September, the average sunshine in Surfside Beach is 8.5h.

UV index

The average daily maximum UV index in September in Surfside Beach, Texas, is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 6 in September transforms into the following instructions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. 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. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
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Frequently asked questions

Is it hot in Surfside Beach during September?

The high-temperature in Surfside Beach, Texas, during September is 85.5°F (29.7°C) and the low-temperature is 77.2°F (25.1°C). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 95°F (35°C).

What is the average humidity in September in Surfside Beach?

The average relative humidity in September in Surfside Beach, Texas, is 75%.

What is the wettest month in Surfside Beach?

September is the month with the most rainfall in Surfside Beach. Rain falls for 18.7 days and accumulates 3.58" (91mm) of precipitation.

How many days does it rain in September in Surfside Beach?

In Surfside Beach, during September, the rain falls for 18.7 days and regularly aggregates up to 3.58" (91mm) of precipitation.

When it does not snow in Surfside Beach?

February through December are months without snowfall in Surfside Beach, Texas.

What is the average length of the day in September in Surfside Beach?

In Surfside Beach, the average day length in September is 12h and 19min.

What time are sunrise and sunset in September in Surfside Beach?

In September, on the first day of the month, sunrise is at 6:59 am and sunset at 7:42 pm. On the last day of the month, in Surfside Beach, sunrise is at 7:14 am and sunset at 7:07 pm CDT.

How long on average sun shines in September in Surfside Beach?

The average sunshine duration in September is 8.5h.

What is the UV index intensity in September in Surfside Beach?

In Surfside Beach, Texas, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
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
Surfside Beach, TX

Average temperature in September - Surfside Beach, TX
  • Average high temperature in September: 85.5°F

The warmest month (with the highest average high temperature) is August (88.9°F).
The month with the lowest average high temperature is January (61°F).

  • Average low temperature in September: 77.2°F

The month with the highest average low temperature is August (81°F).
The coldest month (with the lowest average low temperature) is January (51.4°F).

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Average pressure in September
Surfside Beach, TX

Average pressure in September - Surfside Beach, TX
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Surfside Beach, TX

Average wind speed in September - Surfside Beach, TX
  • Average wind speed in September: 8.8mph

The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

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Average humidity in September
Surfside Beach, TX

Average humidity in September - Surfside Beach, TX
  • Average humidity in September: 75%

The months with the highest relative humidity are February and March (80%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Surfside Beach, TX

Average rainfall in September - Surfside Beach, TX
  • Average rainfall in September: 3.58"

The wettest month (with the highest rainfall) is September (3.58").
The driest month (with the least rainfall) is March (0.67").

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Average rainfall days in September
Surfside Beach, TX

Average rainfall days in September - Surfside Beach, TX
  • Average rainfall days in September: 18.7 days

The month with the highest number of rainy days is September (18.7 days).
The months with the least rainy days are January and February (9.4 days).

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Average snowfall days in September
Surfside Beach, TX

Average snowfall days in September - Surfside Beach, TX
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in September /
Average sunshine in September
Surfside Beach, TX

Average daylight in September / Average sunshine in September - Surfside Beach, 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 3min

The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).

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Average sunshine days in September
Surfside Beach, TX

Average sunshine days in September - Surfside Beach, TX
  • Average sunshine days in September: 8.4 days

The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is September (8.4 days).

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Average UV index in September
Surfside Beach, TX

Average UV index in September - Surfside Beach, 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
Surfside Beach, TX

Average cloud cover in September - Surfside Beach, TX
  • Average cloud cover in September: 31

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 26).

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Average visibility in September
Surfside Beach, TX

Average visibility in September - Surfside Beach, 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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Surfside Beach, Texas, USA

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