Gros Islet
Saint Lucia
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Gros Islet, Saint Lucia

December, the first month of the winter, in Gros Islet, is still a warm month, with average temperature varying between 23°C (73.4°F) and 29°C (84.2°F).

Temperature

In Gros Islet, Saint Lucia, the average high-temperature remains equal as in November - a still warm 29°C (84.2°F). In Gros Islet, the average low-temperature is 23°C (73.4°F).

Rainfall

In Gros Islet, in December, it is raining for 18 days, with typically 149mm (5.9") of accumulated precipitation. In Gros Islet, during the entire year, the rain falls for 209 days and collects up to 2035mm (80.1") of precipitation.

Sea temperature

In Gros Islet, the average water temperature is 27.8°C (82°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) 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, with an average of 11.3h of daylight.

Sunshine

January through September, November and December, with an average of 8h of sunshine, are months with the most sunshine in Gros Islet.

UV index

December is the month with the lowest UV index in Gros Islet, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high threat to health from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 8 in December transform into the following instructions:
Take extra precautions. Protection against sun damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in December in Gros Islet?

In Gros Islet, in December, the average high-temperature is 29°C (84.2°F), and the average low-temperature is 23°C (73.4°F).

How many days does it rain in December in Gros Islet?

In Gros Islet, in December, it is raining for 18 days, with typically 149mm (5.9") of accumulated precipitation.

What is the sea water temperature in December in Gros Islet?

In Gros Islet, the average seawater temperature in December is 27.8°C (82°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Gros Islet?

With an average of 11.3h of daylight, December has the shortest days of the year.

What is the average length of the day in December in Gros Islet?

In December, the average length of the day in Gros Islet, Saint Lucia, is 11.3h.

What is the month with the most sunshine in Gros Islet?

January through September, November and December, with an average of 8h of sunshine, are months with the most sunshine in Gros Islet.

How long on average sun shines in December in Gros Islet?

In December, the average sunshine is 8h.

When is the lowest UV index in Gros Islet?

December is the month with the lowest UV index in Gros Islet, Saint Lucia, with an average maximum UV index of 8.

How high is the UV index in December in Gros Islet?

In Gros Islet, the average daily maximum UV index in December is 8. A UV Index reading of 8 to 10 represents a very high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in December - Gros Islet, Saint Lucia
  • Average high temperature in December: 29°C

Warmest months (with the highest average high temperature) are May, June, July, August, September and October (30°C).
Months with the lowest average high temperature are January and February (28°C).

  • Average low temperature in December: 23°C

The month with the highest average low temperature is July (25°C).
Coldest months (with the lowest average low temperature) are January, February and March (22°C).

Average rainfall in December - Gros Islet, Saint Lucia
  • Average rainfall in December: 149mm

The wettest month (with the highest rainfall) is October (269mm).
The driest month (with the lowest rainfall) is March (76mm).

Average rainfall days in December - Gros Islet, Saint Lucia
  • Average rainfall days in December: 18 days

The month with the highest number of rainy days is September (25 days).
The month with the lowest number of rainy days is April (11 days).

Average sea temperature in December - Gros Islet, Saint Lucia
  • Average sea temperature in December: 27.8°C

The best month for swimming (with the highest average sea temperature) is September (29.4°C).
The coldest month (with the lowest average sea temperature) is March (27°C).

Average daylight in December / Average sunshine in December - Gros Islet, Saint Lucia
  • Average daylight in December: 11.3h

The month with the longest days is June (Average daylight: 13h).
The month with shortest days is December (Average daylight: 11.3h).

  • Average sunshine in December: 8h

Months with most sunshine are January, February, March, April, May, June, July, August, September, November and December (Average sunshine: 8h).
The month with least sunshine is October (Average sunshine: 7h).

Average UV index in December - Gros Islet, Saint Lucia
  • Average UV index in December: 8

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 8).