December weather forecastTybee Island, GA

December

Weather in December

December usually brings about the chill in Tybee Island, Georgia. It marks the beginning of winter with shorter daylight hours and an overall drop in temperatures. In comparison to the preceding and following months, December showcases the highest humidity at 78% and a material increase in rainfall to 3.58in. Entering January, forecasts indicate a minor decrease in temperatures. The month ends without any snowfall, making it unique in contrast to many parts of the Northern hemisphere.

Temperature

The transition into December shows a subtle variation to a still enjoyable 61.7°F (16.5°C) from November's 66.7°F (19.3°C) in the average high-temperature. Tybee Island experiences an average low-temperature of 51.8°F (11°C) in month of December.

Humidity

December is the most humid month, with an average relative humidity of 78%.

Rainfall

In December, the rain falls for 11.7 days. Throughout December, 3.58" (91mm) of precipitation is accumulated. 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 December, the average ocean temperature is 61.5°F (16.4°C).
Note: Swimming in water of 61.5°F (16.4°C) is not enjoyable for the majority of individuals. Breathing control becomes increasingly challenging as the temperature dips from 69.8°F (21°C) to 59°F (15°C).

Daylight

The month with the shortest days is December, with an average of 10h and 6min of daylight.
On the first day of December, sunrise is at 7:06 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:29 pm EST.

Sunshine

December has the least sunshine of the year, with an average of 5.4h of sunshine.

UV index

In Tybee Island, the average daily maximum UV index in December is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 4 during December translates into the following guidance:
Take precautions. Light skin individuals may get burned in less than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Boost your sun resistance with garments that are densely woven yet spacious.

Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in December, in Tybee Island, is 61.7°F (16.5°C) and the average low-temperature is 51.8°F (11°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in September is calculated to be 89.6°F (32°C).

The most humid month in Tybee Island is December, with an average relative humidity of 78%.

The average relative humidity in December is 78%.

In Tybee Island, during December, the rain falls for 11.7 days and regularly aggregates up to 3.58" (91mm) of precipitation.

In Tybee Island, snow does not fall in March through December.

In Tybee Island, in December, it doesn't snow. In January, it regularly snows.

In Tybee Island, in December, the average water temperature is 61.5°F (16.4°C). For most, swimming in 61.5°F (16.4°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

With an average of 10h and 6min of daylight, December has the shortest days of the year.

In December, the average day length is 10h and 6min.

In December, on the first day of the month, sunrise is at 7:06 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:29 pm EST.

With an average of 5.4h of sunshine, December has the least sunshine of the year.

In December, the average sunshine duration is 5.4h.

The average daily maximum UV index in December is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

66.7°F

61.7°F

57.7°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.9mph

10.8mph

10.9mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

11.7

10.2

Average snowfall days

0.1

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

19.5

17.1

19.6

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Tybee Island, GA

Average high temperature in December: 61.7°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 December: 51.8°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 December
Tybee Island, GA

Average pressure in December: 30.13"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 December
Tybee Island, GA

Average wind speed in December: 10.1mph

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 December
Tybee Island, GA

Average humidity in December: 78%

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 December
Tybee Island, GA

Average rainfall in December: 3.58"

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 December
Tybee Island, GA

Average rainfall days in December: 11.7 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 December
Tybee Island, GA

Average snowfall days in December: 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 December
Tybee Island, GA

Average sea temperature in December: 61.5°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 December /
Average sunshine in December
Tybee Island, GA

Average daylight in December: 10h and 6min

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 December: 5h and 24min

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 December
Tybee Island, GA

Average sunshine days in December: 17.1 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 December
Tybee Island, GA

Average UV index in December: 4

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 December
Tybee Island, GA

Average cloud cover in December: 40

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 December
Tybee Island, GA

Average visibility in December: 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).