September weather forecastWilmington Island, GA
September
Weather in September
September, the first month of the autumn in Wilmington Island, is still a warm month, with temperature in the range of an average low of 74.5°F (23.6°C) and an average high of 83.3°F (28.5°C).Temperature
The shift into September finds Wilmington Island at an average high-temperature of a warm 83.3°F (28.5°C), closely comparable to August's conditions. Wilmington Island records a consistent average nighttime temperature of 74.5°F (23.6°C) in September, slightly lower than the daytime high.Heat index
The average heat index in September is estimated at a hot 89.6°F (32°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.Heat index readings emphasize conditions of light breezes and shaded spots. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
In September, the average relative humidity is 75%.Rainfall
In Wilmington Island, during September, the rain falls for 15.5 days and regularly aggregates up to 3.31" (84mm) of precipitation. In Wilmington Island, during the entire year, the rain falls for 166.3 days and collects up to 36.89" (937mm) of precipitation.Snowfall
In Wilmington Island, snow does not fall in March through December.Daylight
In Wilmington Island, the average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 6:59 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:09 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 6 during September translates into the following guidance:
Shun overexposure. Protection from sun ravages is indispensable. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Wilmington Island, GA
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (57.7°F).
- Average low temperature in September: 74.5°F
The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is January (47.1°F).
Average pressure in September
Wilmington Island, GA
- 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).
Average wind speed in September
Wilmington Island, GA
- Average wind speed in September: 8.9mph
The windiest months (with the highest average wind speed) are January and November (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).
Average humidity in September
Wilmington Island, GA
- Average humidity in September: 75%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January, March and October (73%).
Average rainfall in September
Wilmington Island, GA
- Average rainfall in September: 3.31"
The wettest month (with the highest rainfall) is August (6.02").
The driest month (with the least rainfall) is January (1.5").
Average rainfall days in September
Wilmington Island, GA
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is August (22.5 days).
The month with the least rainy days is November (8 days).
Average snowfall days in September
Wilmington Island, GA
- 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).
Average daylight in September /
Average sunshine in September
Wilmington Island, GA
- Average daylight in September: 12h and 24min
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 36min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Wilmington Island, GA
- Average sunshine days in September: 12.2 days
The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is August (6 days).
Average UV index in September
Wilmington 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
Wilmington Island, GA
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in September
Wilmington 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).
