September weather forecastTybee Island, GA
September
Weather in September
September signals the start of autumn in Tybee Island, Georgia. With the arrival of fall, the area starts experiencing a decrease in daylight hours and a slight drop in temperatures. As September progresses, with rainfall lowering to 3.31in, the temperature cool down is discernible. Transitioning into October, a further reduction in temperature and increased precipitation is predicted. However, snowfall remains absent throughout this period.Temperature
The advent of September in Tybee Island, Georgia, brings an average high-temperature of a moderately hot 83.3°F (28.5°C), almost identical to the preceding month. Tybee Island encounters an average temperature dip to a still warm 74.5°F (23.6°C) throughout September, subtly lower than its daytime maximum.Heat index
The average heat index in September is calculated to be a tropical 89.6°F (32°C). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.Note that heat index values are valued for light wind and location in the shade. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
In September, the average relative humidity is 75%.Rainfall
In Tybee Island, Georgia, in September, it is raining for 15.5 days, with typically 3.31" (84mm) of accumulated precipitation. Throughout the year, there are 166.3 rainfall days, and 36.89" (937mm) of precipitation is accumulated.Snowfall
In Tybee Island, snow does not fall in March through December.Ocean temperature
In Tybee Island, the average seawater temperature in September is 81.7°F (27.6°C).Note: Water temperatures ranging between 77°F (25°C) and 84.2°F (29°C) are regarded as very warm, making swimming, diving, and similar water activities pleasurable for extended periods.
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
In September, the average sunshine is 8.6h.UV index
In Tybee Island, Georgia, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 6 during September translates into these guidelines:
Guard oneself from overexposure. Defence against sun injury is vital. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Enhance your sun protection with tightly woven, yet airy clothing. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tybee 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
Tybee 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
Tybee 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
Tybee 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
Tybee 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
Tybee 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
Tybee 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 sea temperature in September
Tybee Island, GA
- Average sea temperature in September: 81.8°F
The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (57.5°F).
Average daylight in September /
Average sunshine in September
Tybee 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
Tybee 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
Tybee 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
Tybee 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
Tybee 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).
