September weather forecast
Tybee Island, GA

englishespañol中文
Share

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 ushering in of September in Tybee Island brings an average high-temperature of a moderately hot 83.3°F (28.5°C), closely mirroring the 87.1°F (30.6°C) of August. September nights register a minor temperature decline, steadying at 74.5°F (23.6°C).

Heat index

The average heat index in September is appraised at a tropical 89.6°F (32°C). If one remains active during constant exposure, it might cause exhaustion and heat cramps.
Heat index's context suggests values are appropriate for shady areas and slight breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. 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 particularly relevant to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.

Humidity

The average relative humidity in September in Tybee Island, Georgia, is 75%.

Rainfall

In Tybee Island, Georgia, in September, during 15.5 rainfall days, 3.31" (84mm) of precipitation is typically accumulated. Throughout the year, there are 166.3 rainfall days, and 36.89" (937mm) of precipitation is accumulated.

Snowfall

March through December are months without snowfall.

Ocean temperature

In Tybee Island, Georgia, in September, the average water temperature is 81.7°F (27.6°C).
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for swimming, diving, and other activities, ensuring comfort and enjoyment for lengthened periods.

Daylight

In Tybee 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

The average sunshine in September in Tybee Island is 8.6h.

UV index

In Tybee Island, Georgia, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The UV index of 6 during September translates into the following guidance:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
[Resources]

Frequently asked questions

How hot is it in Tybee Island in September?

The high-temperature in Tybee Island, Georgia, during September is 83.3°F (28.5°C) and the low-temperature is 74.5°F (23.6°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is appraised at 89.6°F (32°C).

What is the average humidity in September in Tybee Island?

In Tybee Island, the average relative humidity in September is 75%.

How many days does it rain in September in Tybee Island?

In September, the rain falls for 15.5 days. Throughout September, 3.31" (84mm) of precipitation is accumulated.

When it does not snow in Tybee Island?

March through December are months without snowfall in Tybee Island, Georgia.

How warm is the water in September in Tybee Island?

In Tybee Island, Georgia, in September, the average water temperature is 81.7°F (27.6°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in September in Tybee Island?

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

When are sunrise and sunset in September in Tybee Island?

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.

How long on average sun shines in September in Tybee Island?

In Tybee Island, Georgia, the average sunshine duration in September is 8.6h.

What is the UV index intensity in September in Tybee Island?

In Tybee Island, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Tybee Island, GA

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).

[Resources]

Average pressure in September
Tybee Island, GA

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).

[Resources]

Average wind speed in September
Tybee Island, GA

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).

[Resources]

Average humidity in September
Tybee Island, GA

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%).

[Resources]

Average rainfall in September
Tybee Island, GA

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").

[Resources]

Average rainfall days in September
Tybee Island, GA

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).

[Resources]

Average snowfall days in September
Tybee Island, GA

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).

[Resources]

Average sea temperature in September
Tybee Island, GA

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).

[Resources]

Average daylight in September /
Average sunshine in September
Tybee Island, GA

Average daylight in September / Average sunshine in September - Tybee 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: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

[Resources]

Average sunshine days in September
Tybee Island, GA

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).

[Resources]

Average UV index in September
Tybee Island, GA

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).

[Resources]

Average cloud cover in September
Tybee Island, GA

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).

[Resources]

Average visibility in September
Tybee Island, GA

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).

[Resources]

Tybee Island, Georgia, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location