September weather forecastBluffton, FL
September
Weather in September
September, the first month of the autumn in Bluffton, is also a hot month, with temperature in the range of an average low of 73.8°F (23.2°C) and an average high of 88.5°F (31.4°C).Temperature
Bluffton sees the arrival of September with an average high-temperature of a still hot 88.5°F (31.4°C), indicating a subtle variation from August. In Bluffton, an average nighttime temperature of 73.8°F (23.2°C) is expected during September.Heat index
For September, the heat index is calculated to be a blisteringly hot 105.8°F (41°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. 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.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.
Humidity
August and September, with an average relative humidity of 78%, are the most humid months.Rainfall
In Bluffton, during September, the rain falls for 22.3 days and regularly aggregates up to 4.09" (104mm) of precipitation. In Bluffton, during the entire year, the rain falls for 191.3 days and collects up to 34.45" (875mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
The average length of the day in September is 12h and 19min.On the first day of September, sunrise is at 7:04 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:12 pm EDT.
Sunshine
In Bluffton, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Deflect overexposure. Sun protection is a necessity. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. 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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bluffton, FL
- Average high temperature in September: 88.5°F
The warmest month (with the highest average high temperature) is August (91.4°F).
The month with the lowest average high temperature is January (67.1°F).
- Average low temperature in September: 73.8°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (49.6°F).
Average pressure in September
Bluffton, FL
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in September
Bluffton, FL
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are March and April (5.8mph).
The calmest month (with the lowest average wind speed) is July (4.2mph).
Average humidity in September
Bluffton, FL
- Average humidity in September: 78%
The months with the highest relative humidity are August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Bluffton, FL
- Average rainfall in September: 4.09"
The wettest month (with the highest rainfall) is July (5.28").
The driest months (with the least rainfall) are March and November (1.26").
Average rainfall days in September
Bluffton, FL
- Average rainfall days in September: 22.3 days
The month with the highest number of rainy days is August (26.3 days).
The month with the least rainy days is November (9.6 days).
Average snowfall days in September
Bluffton, FL
- 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).
Average daylight in September /
Average sunshine in September
Bluffton, FL
- Average daylight in September: 12h and 18min
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 30min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Bluffton, FL
- Average sunshine days in September: 6.1 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is August (3 days).
Average UV index in September
Bluffton, FL
- 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 4).
Average cloud cover in September
Bluffton, FL
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 29).
Average visibility in September
Bluffton, FL
- 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).
