December weather forecastGrand Roy, Grenada
December
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.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 11h and 24min
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 18min
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: 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: 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: 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: 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).
