Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The commencement of September introduces an average high-temperature of a warm 85.6°F (29.8°C), closely mirroring the preceding month. The low-temperature average for Sapelo Island during September stands at a pleasant 72.5°F (22.5°C).Heat index
For most parts of September, the heat index is computed to be a torrid 96.8°F (36°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.Understanding the heat index involves considering values for shaded locales with light wind. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', determines the feeling of heat when you account for the relative humidity. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are essentially critical for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
In September, the average relative humidity is 77%.Rainfall
In Sapelo Island, in September, during 14.8 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. Throughout the year, there are 155.7 rainfall days, and 26.57" (675mm) of precipitation is accumulated.Snowfall
January, March through November are months without snowfall.Daylight
The average length of the day in September in Sapelo Island is 12h and 21min.On the first day of September in Sapelo Island, Georgia, sunrise is at 7:01 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:10 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
The average daily maximum UV index in September in Sapelo Island, Georgia, is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Sapelo Island during September?
What is the average humidity in September in Sapelo Island?
How many days does it rain in September in Sapelo Island?
When it does not snow in Sapelo Island?
How many hours of daylight does Sapelo Island have in September?
When is the sunrise / sunset in September in Sapelo Island?
How many hours of sunshine does Sapelo Island have in September?
What is the UV index intensity in September in Sapelo Island?
Average temperature in September
Sapelo Island, GA
- Average high temperature in September: 85.6°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (59.7°F).
- Average low temperature in September: 72.5°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 (45.7°F).
Average pressure in September
Sapelo Island, GA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in September
Sapelo Island, GA
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Sapelo Island, GA
- Average humidity in September: 77%
The months with the highest relative humidity are August and December (78%).
The month with the lowest relative humidity is March (72%).
Average rainfall in September
Sapelo Island, GA
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in September
Sapelo Island, GA
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is August (20 days).
The month with the least rainy days is November (7.9 days).
Average snowfall days in September
Sapelo Island, GA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and December (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Sapelo Island, GA
- 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Sapelo Island, GA
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is August (8.4 days).
Average UV index in September
Sapelo Island, GA
- 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).
Average cloud cover in September
Sapelo Island, GA
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Sapelo Island, GA
- 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).
Sapelo Island, Georgia, USA
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