December weather forecast
St. Augustine, FL

englishespañol中文
Share
Palm trees and colorful houses in front of water fountains in a popular town square in St. Augustine, Florida
Palm trees and colorful houses in front of water fountains in a popular town square in St. Augustine, Florida

Weather in December

As St. Augustine, Florida, welcomes the winter season, December brings a significant change in the city's weather. The mild chill bracing the air, the shortened daylight hours, and the chilling sea surface temperatures signal the onset of winter. Markedly, December encounters less rainfall with the average tallying up to only 2.4" (61mm), contributing to dry winter days. The sun still shines beautifully, turning the city into a winter wonderland. Overall, St. Augustine's weather in December serves as an elegant curtain closer to a year marked by enticingly diverse climatic patterns.

Temperature

St. Augustine's progression into December involves a gentle drop in the average high-temperature, from a warm 73.9°F (23.3°C) in November to a pleasant 68°F (20°C). In St. Augustine, December is marked by an average low-temperature of 48.9°F (9.4°C).

Rainfall

In St. Augustine, in December, it is raining for 7 days, with typically 2.4" (61mm) of accumulated precipitation. Throughout the year, in St. Augustine, there are 116 rainfall days, and 50" (1270mm) of precipitation is accumulated.

Ocean temperature

In St. Augustine, the average seawater temperature in December is 68.4°F (20.2°C).
Note: Swimming becomes less enjoyable for most at a surface water temperature of 68.4°F (20.2°C). As the temperature decreases below 69.8°F (21°C), breathing becomes increasingly difficult.

Daylight

With an average of 10h and 18min of daylight, December has the shortest days of the year in St. Augustine.
On the first day of December in St. Augustine, sunrise is at 7:03 am and sunset at 5:25 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:36 pm EST.

Sunshine

December has the least sunshine of the year in St. Augustine, with an average of 6h of sunshine.

UV index

The months with the lowest UV index in St. Augustine are January and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 4 in December transforms into the following instructions:
Ensure safety - Sun damage prevention is strongly urged. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
[Resources]

Frequently asked questions

What are the temperatures in St. Augustine in December?

In St. Augustine, 68°F (20°C) is the average high-temperature and 48.9°F (9.4°C) is the average low-temperature during December.

How much does it rain in St. Augustine in December?

In December, the rain falls for 7 days. Throughout December, 2.4" (61mm) of precipitation is accumulated.

How cold is the water in December in St. Augustine?

In December, the average ocean temperature is 68.4°F (20.2°C). For swimming, a surface water temperature of 68.4°F (20.2°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days in St. Augustine?

December has the shortest days of the year in St. Augustine, Florida, with an average of 10h and 18min of daylight.

How many hours of daylight does St. Augustine have in December?

The average day length in December in St. Augustine, Florida, is 10h and 16min.

When is the sunrise / sunset in December in St. Augustine?

On the first day of December, sunrise is at 7:03 am and sunset at 5:25 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:36 pm EST.

What is the month with the least sunshine in St. Augustine?

The month with the least sunshine in St. Augustine is December, with an average of 6h of sunshine.

How many hours of sunshine does St. Augustine have in December?

In December, the average sunshine duration is 6h.

What is the month with the lowest UV index in St. Augustine?

The months with the lowest UV index in St. Augustine, Florida, are January and December, with an average maximum UV index of 4.

What is the UV index reading in December in St. Augustine?

In St. Augustine, the average daily maximum UV index in December is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
St. Augustine, FL

Average temperature in December - St. Augustine, FL
  • Average high temperature in December: 68°F

The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (66°F).

  • Average low temperature in December: 49°F

The month with the highest average low temperature is August (73°F).
The coldest month (with the lowest average low temperature) is January (46°F).

[Resources]

Average rainfall in December
St. Augustine, FL

Average rainfall in December - St. Augustine, FL
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is September (7.5").
The driest month (with the least rainfall) is November (2.3").

[Resources]

Average rainfall days in December
St. Augustine, FL

Average rainfall days in December - St. Augustine, FL
  • Average rainfall days in December: 7 days

The months with the highest number of rainy days are July and August (15 days).
The month with the least rainy days is April (6 days).

[Resources]

Average sea temperature in December
St. Augustine, FL

Average sea temperature in December - St. Augustine, FL
  • Average sea temperature in December: 68.2°F

The best month for swimming (with the highest average sea temperature) is August (83.8°F).
The coldest months (with the lowest average sea temperature) are January and February (64.3°F).

[Resources]

Average daylight in December /
Average sunshine in December
St. Augustine, FL

Average daylight in December / Average sunshine in December - St. Augustine, FL
  • Average daylight in December: 10h and 2min

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in December: 6h

The months with the most sunshine are March, April, May, June, July and August (Average sunshine: 9h).
The month with the least sunshine is December (Average sunshine: 6h).

[Resources]

Average UV index in December
St. Augustine, FL

Average UV index in December - St. Augustine, FL
  • Average UV index in December: 4

The months with the highest UV index are June and July (UV index 11).
The months with the lowest UV index are January and December (UV index 4).

[Resources]

St. Augustine, Florida, USA

Weather forecast for your location

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