December weather forecast
Grand Roy, Grenada

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Weather in December

December ends the year with a discernible drop in temperature and ebbing daylight hours. As in November, the trend of higher rainfall continues throughout this month with a precipitation level at 55mm (2.17"). The UV index, temperature, and cloud cover remain constant, indicative of the stable winter conditions setting in. Despite the cooler temperatures of 26.7°C (80.1°F) to 27.7°C (81.9°F), the weather is still fairly warm, closing the year on a cozy and comfortable note.

Temperature

Grand Roy registers an average high-temperature of a still moderately hot 27.7°C (81.9°F) at the commencement of December, closely related to the preceding month. Grand Roy's evenings during December maintain an average temperature of 26.7°C (80.1°F), aligning closely with the daytime temperatures.

Heat index

Throughout December, the heat index is appraised at a hot 31°C (87.8°F). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. 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', measures the perceived warmth when incorporating the humidity present in the air. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.

Humidity

In December, the average relative humidity in Grand Roy is 77%.

Rainfall

In Grand Roy, in December, during 21.7 rainfall days, 55mm (2.17") of precipitation is typically accumulated. Throughout the year, there are 232 rainfall days, and 739mm (29.09") of precipitation is accumulated.

Daylight

December has the shortest days of the year in Grand Roy, with an average of 11h and 24min of daylight.
On the first day of the month, sunrise is at 06:12 and sunset at 17:40. On the last day of December, in Grand Roy, sunrise is at 06:27 and sunset at 17:53 AST.

Sunshine

With an average of 6.3h of sunshine, December has the least sunshine of the year.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: A maximum UV index of 7 in December translates into the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.

Frequently asked questions

What are the temperatures in Grand Roy in December?

The high-temperature, in December, in Grand Roy, records 27.7°C (81.9°F), while the low-temperature is 26.7°C (80.1°F). In December, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 31°C (87.8°F).

What is the average humidity in December in Grand Roy?

In December, the average relative humidity in Grand Roy is 77%.

How many days does it rain in December in Grand Roy?

In Grand Roy, in December, during 21.7 rainfall days, 55mm (2.17") of precipitation is typically accumulated.

What is the month with the shortest days in Grand Roy?

The month with the shortest days is December, with an average of 11h and 24min of daylight.

How many hours of daylight does Grand Roy have in December?

In Grand Roy, Grenada, the average day length in December is 11h and 26min.

When is the sunrise / sunset in December in Grand Roy?

In December, on the first day of the month, sunrise is at 06:12 and sunset at 17:40. On the last day of the month, in Grand Roy, sunrise is at 06:27 and sunset at 17:53 AST.

What is the month with the least sunshine in Grand Roy?

With an average of 6.3h of sunshine, December has the least sunshine of the year.

How many hours of sunshine does Grand Roy have in December?

In Grand Roy, Grenada, the average sunshine duration in December is 6.3h.

When is the highest UV index in Grand Roy?

January through December, with an average maximum UV index of 7, are months with the highest UV index in Grand Roy, Grenada.

When is the lowest UV index in Grand Roy?

January through December, with an average maximum UV index of 7, are months with the lowest UV index in Grand Roy.

How high is the UV index in December in Grand Roy?

The average daily maximum UV index in December is 7. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.

Average temperature in December
Grand Roy, Grenada

Average temperature in December - Grand Roy, Grenada
  • Average high temperature in December: 27.7°C

The warmest months (with the highest average high temperature) are September and October (28.8°C).
The month with the lowest average high temperature is February (26.7°C).

  • Average low temperature in December: 26.7°C

The month with the highest average low temperature is September (28.1°C).
The coldest month (with the lowest average low temperature) is February (25.8°C).

Average pressure in December
Grand Roy, Grenada

Average pressure in December - Grand Roy, Grenada
  • Average pressure in December: 1012.7mbar

The month with the highest atmospheric pressure is June (1014.2mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).

Average wind speed in December
Grand Roy, Grenada

Average wind speed in December - Grand Roy, Grenada
  • Average wind speed in December: 28.2km/h

The windiest month (with the highest average wind speed) is February (29.4km/h).
The calmest month (with the lowest average wind speed) is September (21.5km/h).

Average humidity in December
Grand Roy, Grenada

Average humidity in December - Grand Roy, Grenada
  • Average humidity in December: 77%

The months with the highest relative humidity are May, June and July (79%).
The months with the lowest relative humidity are February and September (76%).

Average rainfall in December
Grand Roy, Grenada

Average rainfall in December - Grand Roy, Grenada
  • Average rainfall in December: 55mm

The wettest month (with the highest rainfall) is October (110mm).
The driest month (with the least rainfall) is April (25mm).

Average rainfall days in December
Grand Roy, Grenada

Average rainfall days in December - Grand Roy, Grenada
  • Average rainfall days in December: 21.7 days

The months with the highest number of rainy days are July and August (22.3 days).
The month with the least rainy days is April (14.8 days).

Average daylight in December /
Average sunshine in December
Grand Roy, Grenada

Average daylight in December / Average sunshine in December - Grand Roy, Grenada
  • Average daylight in December: 11h and 2min

The month with the longest days is June (Average daylight: 12h and 48min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in December: 6h and 2min

The months with the most sunshine are August and September (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

Average sunshine days in December
Grand Roy, Grenada

Average sunshine days in December - Grand Roy, Grenada
  • Average sunshine days in December: 5.6 days

The months with the most sunshine days are April and October (9.2 days).
The month with the least sunshine days is July (4.6 days).

Average UV index in December
Grand Roy, Grenada

Average UV index in December - Grand Roy, Grenada
  • Average UV index in December: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

Average cloud cover in December
Grand Roy, Grenada

Average cloud cover in December - Grand Roy, Grenada
  • Average cloud cover in December: 42

The month with the most cloud cover is November (Cloud cover 43).
The month with the least cloud cover is September (Cloud cover 35).

Average visibility in December
Grand Roy, Grenada

Average visibility in December - Grand Roy, Grenada
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

Grand Roy, Grenada

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