September weather forecast
Bluffton, SC

The iconic historic Church of the Cross in Bluffton, South Carolina, set in a beautiful garden park
The iconic historic Church of the Cross in Bluffton, South Carolina, set in a beautiful garden park

Weather in September

September, the first month of the autumn in Bluffton, is still a warm month, with an average temperature fluctuating between 83.3°F (28.5°C) and 74.1°F (23.4°C).

Temperature

In Bluffton, South Carolina, the average high-temperature in September is essentially the same as in August - a warm 83.3°F (28.5°C). In Bluffton, South Carolina, in September, the average low-temperature is 74.1°F (23.4°C).

Heat index

In September, the average heat index is computed to be a hot 89.6°F (32°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like metabolic differences, pregnancy, wind, and activity influence one's weather impression. 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 important for children. 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

The average relative humidity in September is 75%.

Rainfall

In Bluffton, during 17.9 rainfall days, 3.78" (96mm) of precipitation is typically accumulated. In Bluffton, during the entire year, the rain falls for 175.3 days and collects up to 32.28" (820mm) of precipitation.

Snowfall

February through December are months without snowfall.

Daylight

The average length of the day in September is 12h and 21min.
On the first day of the month, sunrise is at 6:58 am and sunset at 7:48 pm. On the last day of September, in Bluffton, South Carolina, sunrise is at 7:16 am and sunset at 7:10 pm EDT.

Sunshine

In Bluffton, the average sunshine in September is 8.8h.

UV index

In Bluffton, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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 Bluffton?

In September, in Bluffton, South Carolina, the average high-temperature is 83.3°F (28.5°C), and the average low-temperature is 74.1°F (23.4°C). in September, the average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is computed to be 89.6°F (32°C).

What is the average humidity in September in Bluffton?

In September, the average relative humidity is 75%.

How much does it rain in Bluffton in September?

In Bluffton, South Carolina, in September, it is raining for 17.9 days, with typically 3.78" (96mm) of accumulated precipitation.

When it does not snow in Bluffton?

February through December are months without snowfall.

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

In Bluffton, the average day length in September is 12h and 21min.

What time are sunrise and sunset in September in Bluffton?

On the first day of September, sunrise is at 6:58 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:10 pm EDT.

How long on average sun shines in September in Bluffton?

The average sunshine duration in September is 8.8h.

What is the UV index reading in September in Bluffton?

In Bluffton, South Carolina, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
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
Bluffton, SC

Average temperature in September - Bluffton, SC
  • Average high temperature in September: 83.3°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (57.4°F).

  • Average low temperature in September: 74.1°F

The month with the highest average low temperature is July (77.9°F).
The coldest month (with the lowest average low temperature) is January (46°F).

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Average pressure in September
Bluffton, SC

Average pressure in September - Bluffton, SC
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).

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Average wind speed in September
Bluffton, SC

Average wind speed in September - Bluffton, SC
  • Average wind speed in September: 8.5mph

The windiest months (with the highest average wind speed) are January, March and April (9.6mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

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Average humidity in September
Bluffton, SC

Average humidity in September - Bluffton, SC
  • Average humidity in September: 75%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is January (72%).

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Average rainfall in September
Bluffton, SC

Average rainfall in September - Bluffton, SC
  • Average rainfall in September: 3.78"

The wettest month (with the highest rainfall) is August (6.06").
The driest month (with the least rainfall) is January (1.02").

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Average rainfall days in September
Bluffton, SC

Average rainfall days in September - Bluffton, SC
  • Average rainfall days in September: 17.9 days

The month with the highest number of rainy days is August (25 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in September
Bluffton, SC

Average snowfall in September - Bluffton, SC
  • Average snowfall in September: 0"

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

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Average snowfall days in September
Bluffton, SC

Average snowfall days in September - Bluffton, SC
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (0.1 days).
The months with the least snowfall days are 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
Bluffton, SC

Average daylight in September / Average sunshine in September - Bluffton, SC
  • Average daylight in September: 12h and 21min

The month with the longest days is June (Average daylight: 14h and 14min).
The month with the shortest days is December (Average daylight: 10h and 5min).

  • Average sunshine in September: 8h and 48min

The months with the most sunshine are June and July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in September
Bluffton, SC

Average sunshine days in September - Bluffton, SC
  • Average sunshine days in September: 8.3 days

The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (2.8 days).

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Average UV index in September
Bluffton, SC

Average UV index in September - Bluffton, SC
  • 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 January (UV index 3).

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Average cloud cover in September
Bluffton, SC

Average cloud cover in September - Bluffton, SC
  • Average cloud cover in September: 28

The months with the most cloud cover are February and December (Cloud cover 38).
The months with the least cloud cover are June and July (Cloud cover 25).

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Average visibility in September
Bluffton, SC

Average visibility in September - Bluffton, 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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