September weather forecast
Bluffton, SC

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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 in Bluffton, South Carolina, signals the advent of the transition period from summer to fall. Compared to August, temperatures now begin to decline, with the marks set between 74.1°F (23.4°C) and 83.3°F (28.5°C). Rainfall volume also decreases to 3.78" (96mm), marking September as the transitional month to more comfortable temperatures and less rainfall. This month presents a splendid blend of lingering summer warmth complemented with signs of the incoming coolness of fall.

Temperature

September is marked by an average high-temperature of a moderately hot 83.3°F (28.5°C), almost identical to the preceding month. In Bluffton, the average nighttime temperature during September is 74.1°F (23.4°C).

Heat index

Throughout September, the heat index is appraised at a hot 89.6°F (32°C). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.
Understand that the heat index values take into account shaded locations and mild winds. 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 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

In Bluffton, South Carolina, the average relative humidity in September is 75%.

Rainfall

In Bluffton, in September, 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

In Bluffton, snow does not fall in February through December.

Daylight

In September, the average length of the day is 12h and 21min.
On the first day of September, sunrise is at 6:59 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:09 pm EDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index, 6 during September, leads to the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
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Frequently asked questions

Is it hot in Bluffton during September?

In September, in Bluffton, the average high-temperature is 83.3°F (28.5°C), and the average low-temperature is 74.1°F (23.4°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in September is appraised at 89.6°F (32°C).

What is the average humidity in September in Bluffton?

In September, the average relative humidity in Bluffton, South Carolina, is 75%.

How much does it rain in Bluffton in September?

In September, in Bluffton, the rain falls for 17.9 days. Throughout September, 3.78" (96mm) of precipitation is accumulated.

When it does not snow in Bluffton?

February through December are months without snowfall in Bluffton.

How many hours of daylight does Bluffton have in September?

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

When is the sunrise / sunset in September in Bluffton?

In September, on the first day of the month, sunrise is at 6:59 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:09 pm EDT.

How long on average sun shines in September in Bluffton?

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

What is the UV index intensity in September in Bluffton?

In September, the average daily maximum UV index in Bluffton is 6. A UV Index 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
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 2min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in September: 8h and 5min

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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Bluffton, South Carolina, USA

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