September weather forecast
Surfside Beach, SC

Weather in September

September, the first month of the autumn in Surfside Beach, is still a warm month, with an average temperature varying between 72.1°F (22.3°C) and 81.5°F (27.5°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still warm 81.5°F (27.5°C). In Surfside Beach, the average low-temperature is 72.1°F (22.3°C).

Heat index

The average heat index in September is calculated to be a hot 87.8°F (31°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, clothing, differences in body mass, height, and shape), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity in Surfside Beach, South Carolina, is 77%.

Rainfall

In Surfside Beach, during 16.9 rainfall days, 4.8" (122mm) of precipitation is typically accumulated. Throughout the year, in Surfside Beach, South Carolina, there are 174.7 rainfall days, and 42.13" (1070mm) of precipitation is accumulated.

Snowfall

In Surfside Beach, snow does not fall in March through December.

Daylight

The average length of the day in September in Surfside Beach is 12h and 22min.
On the first day of September in Surfside Beach, South Carolina, sunrise is at 6:49 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 7:02 pm EDT.

Sunshine

The average sunshine in September is 9.4h.

UV index

The average daily maximum UV index in September in Surfside Beach is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 6 in September interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.
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FAQ

What is the temperature in September in Surfside Beach?

In September, in Surfside Beach, South Carolina, the average high-temperature is 81.5°F (27.5°C), and the average low-temperature is 72.1°F (22.3°C). in September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 87.8°F (31°C).

What is the average humidity in September in Surfside Beach?

In September, the average relative humidity in Surfside Beach is 77%.

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

In Surfside Beach, South Carolina, during September, the rain falls for 16.9 days and regularly aggregates up to 4.8" (122mm) of precipitation.

When it does not snow in Surfside Beach?

March through December are months without snowfall in Surfside Beach.

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 22min.

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

In September, on the first day of the month, sunrise is at 6:49 am and sunset at 7:41 pm. On the last day of the month, in Surfside Beach, South Carolina, sunrise is at 7:09 am and sunset at 7:02 pm EDT.

How many hours of sunshine does Surfside Beach have in September?

The average sunshine duration in September is 9.4h.

How high is the UV index in September in Surfside Beach?

In Surfside Beach, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Surfside Beach, SC

Average temperature in September - Surfside Beach, SC
  • Average high temperature in September: 81.5°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (54.7°F).

  • Average low temperature in September: 72.1°F

The month with the highest average low temperature is July (76.5°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).

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Average pressure in September
Surfside Beach, SC

Average pressure in September - Surfside Beach, SC
  • Average pressure in September: 30"Hg

The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

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Average wind speed in September
Surfside Beach, SC

Average wind speed in September - Surfside Beach, SC
  • Average wind speed in September: 9.3mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).

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Average humidity in September
Surfside Beach, SC

Average humidity in September - Surfside Beach, SC
  • Average humidity in September: 77%

The months with the highest relative humidity are May, June, August and December (78%).
The month with the lowest relative humidity is January (74%).

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Average rainfall in September
Surfside Beach, SC

Average rainfall in September - Surfside Beach, SC
  • Average rainfall in September: 4.8"

The wettest month (with the highest rainfall) is August (6.77").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in September
Surfside Beach, SC

Average rainfall days in September - Surfside Beach, SC
  • Average rainfall days in September: 16.9 days

The month with the highest number of rainy days is July (22.7 days).
The month with the least rainy days is November (9.6 days).

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Average snowfall in September
Surfside Beach, SC

Average snowfall in September - Surfside Beach, SC
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.35").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Surfside Beach, SC

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

The months with the highest number of snowfall days are January and February (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
Surfside Beach, SC

Average daylight in September / Average sunshine in September - Surfside Beach, SC
  • Average daylight in September: 12h and 22min

The month with the longest days is June (Average daylight: 14h and 21min).
The month with the shortest days is December (Average daylight: 9h and 58min).

  • Average sunshine in September: 9h and 24min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in September
Surfside Beach, SC

Average sunshine days in September - Surfside Beach, SC
  • Average sunshine days in September: 10.8 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (6 days).

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Average UV index in September
Surfside Beach, SC

Average UV index in September - Surfside Beach, SC
  • Average UV index in September: 6

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and February (UV index 3).

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Average cloud cover in September
Surfside Beach, SC

Average cloud cover in September - Surfside Beach, SC
  • Average cloud cover in September: 30

The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and July (Cloud cover 27).

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Average visibility in September
Surfside Beach, SC

Average visibility in September - Surfside Beach, SC
  • 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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