December weather forecast
Saint John, VI

Beautiful scenery with green vegetation and the vast blue water around the islands in St John, Virgin Islands
Beautiful scenery with green vegetation and the vast blue water around the islands in St John, Virgin Islands

Weather in December

The first month of the winter, December, is still a warm month in Saint John, United States Virgin Islands, with temperature in the range of an average high of 82.4°F (28°C) and an average low of 71.6°F (22°C).

Temperature

The coldest months are January through March and December, with an average high-temperature of 82.4°F (28°C).

Rainfall

In Saint John, during 14 rainfall days, 4.69" (119mm) of precipitation is typically accumulated. Throughout the year, there are 156 rainfall days, and 49.69" (1262mm) of precipitation is accumulated.

Ocean temperature

In December, the average ocean temperature in Saint John is 80.6°F (27°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

December has the shortest days of the year in Saint John, with an average of 11h and 3min of daylight.
On the first day of the month, sunrise is at 6:34 am and sunset at 5:41 pm. On the last day of December, in Saint John, sunrise is at 6:50 am and sunset at 5:53 pm AST.

Sunshine

November and December, with an average of 7h of sunshine, are months with the least sunshine in Saint John.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 7 in December transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
[Resources]

FAQ

What are the coldest months in Saint John?

The coldest months in Saint John are January through March and December, with an average high-temperature of 82.4°F (28°C).

What is the temperature in December in Saint John?

In December, the average high-temperature is 82.4°F (28°C), and the average low-temperature is 71.6°F (22°C).

How many days does it rain in December in Saint John?

In December, the rain falls for 14 days. Throughout December, 4.69" (119mm) of precipitation is accumulated.

How warm is the water in December in Saint John?

In Saint John, United States Virgin Islands, in December, the average water temperature is 80.6°F (27°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in Saint John?

The month with the shortest days is December, with an average of 11h and 3min of daylight.

What is the average length of the day in December in Saint John?

The average day length in December in Saint John, United States Virgin Islands, is 11h and 3min.

When are sunrise and sunset in December in Saint John?

On the first day of December in Saint John, United States Virgin Islands, sunrise is at 6:34 am and sunset at 5:41 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 5:53 pm AST.

What is the month with the least sunshine in Saint John?

November and December, with an average of 7h of sunshine, are months with the least sunshine in Saint John.

How many hours of sunshine does Saint John have in December?

In Saint John, United States Virgin Islands, the average sunshine duration in December is 7h.

What is the month with the lowest UV index in Saint John?

With an average maximum UV index of 7, December is the month with the lowest UV index.

What is the UV index intensity in December in Saint John?

In Saint John, the average daily maximum UV index in December is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average rainfall days
Average sunshine
Average UV index

Average temperature in December
Saint John, VI

Average temperature in December - Saint John, VI
  • Average high temperature in December: 82°F

The warmest months (with the highest average high temperature) are August and September (88°F).
The months with the lowest average high temperature are January, February, March and December (82°F).

  • Average low temperature in December: 72°F

The months with the highest average low temperature are June, July, August, September and October (75°F).
The coldest months (with the lowest average low temperature) are January, February and March (70°F).

[Resources]

Average rainfall in December
Saint John, VI

Average rainfall in December - Saint John, VI
  • Average rainfall in December: 4.7"

The wettest months (with the highest rainfall) are October and November (6.3").
The driest month (with the least rainfall) is February (2.1").

[Resources]

Average rainfall days in December
Saint John, VI

Average rainfall days in December - Saint John, VI
  • Average rainfall days in December: 14 days

The months with the highest number of rainy days are September and October (16 days).
The month with the least rainy days is April (9 days).

[Resources]

Average sea temperature in December
Saint John, VI

Average sea temperature in December - Saint John, VI
  • Average sea temperature in December: 81°F

The best months for swimming (with the highest average sea temperature) are September and October (84°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (79°F).

[Resources]

Average daylight in December /
Average sunshine in December
Saint John, VI

Average daylight in December / Average sunshine in December - Saint John, VI
  • Average daylight in December: 11h and 3min

The month with the longest days is June (Average daylight: 13h and 13min).
The month with the shortest days is December (Average daylight: 11h and 3min).

  • Average sunshine in December: 7h

The months with the most sunshine are March, April, July and August (Average sunshine: 9h).
The months with the least sunshine are November and December (Average sunshine: 7h).

[Resources]

Average UV index in December
Saint John, VI

Average UV index in December - Saint John, VI
  • Average UV index in December: 7

The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location