December weather forecastCulebra, PR
December
Weather in December
December welcomes cooler days in Culebra, as both land and sea experience consistent drops in temperatures. Despite the overall decrease, the temperature remains higher than the yearly average, maintaining the island's tropical feel during the holiday season. The decrease in rainfall, to 2.05" (52mm) over 22.6 days, forecasts a drier season on the horizon. The short daylight hours and less sunshine, in contrast to previous months, suits the winter atmosphere. Steady wind speeds mark the beginning of a windy new year in Culebra.Temperature
In December, Culebra notes an average high-temperature of a still moderately hot 80.6°F (27°C), hardly different from the preceding month. A minor drop in temperature is observed from daytime highs during the nights of December, averaging a still moderately hot 78.4°F (25.8°C).Heat index
The heat index value during December is computed to be 84.2°F (29°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Humidity
January through March, October through December, with an average relative humidity of 75%, are the least humid months.Rainfall
In Culebra, in December, during 22.6 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, there are 253.1 rainfall days, and 33.27" (845mm) of precipitation is accumulated.Ocean temperature
In Culebra, in December, the average water temperature is 81.5°F (27.5°C).Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.
Daylight
The month with the shortest days is December, with an average of 11h and 6min of daylight.On the first day of December, sunrise is at 6:37 am and sunset at 5:43 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 5:56 pm AST.
Sunshine
The months with the least sunshine are November and December, with an average of 6.5h of sunshine.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 estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 7 in December transforms into the following instructions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. 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. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Culebra, PR
- Average high temperature in December: 80.6°F
The warmest month (with the highest average high temperature) is September (84°F).
The month with the lowest average high temperature is March (78.4°F).
- Average low temperature in December: 78.4°F
The month with the highest average low temperature is October (81.5°F).
The coldest month (with the lowest average low temperature) is March (75.7°F).
Average pressure in December
Culebra, PR
- Average pressure in December: 29.98"Hg
The months with the highest atmospheric pressure are January and February (30.02"Hg).
The months with the lowest atmospheric pressure are October and November (29.91"Hg).
Average wind speed in December
Culebra, PR
- Average wind speed in December: 14.7mph
The windiest month (with the highest average wind speed) is July (15mph).
The calmest month (with the lowest average wind speed) is October (11.1mph).
Average humidity in December
Culebra, PR
- Average humidity in December: 75%
The months with the highest relative humidity are May, June, July and August (78%).
The months with the lowest relative humidity are January, February, March, October, November and December (75%).
Average rainfall in December
Culebra, PR
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is September (4.45").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in December
Culebra, PR
- Average rainfall days in December: 22.6 days
The month with the highest number of rainy days is November (25.5 days).
The months with the least rainy days are February, March and June (18.2 days).
Average sea temperature in December
Culebra, PR
- Average sea temperature in December: 81.5°F
The best month for swimming (with the highest average sea temperature) is September (84.9°F).
The coldest month (with the lowest average sea temperature) is February (78.7°F).
Average daylight in December /
Average sunshine in December
Culebra, PR
- Average daylight in December: 11h and 6min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).
- Average sunshine in December: 6h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).
Average sunshine days in December
Culebra, PR
- Average sunshine days in December: 3.6 days
The months with the most sunshine days are March and April (7.3 days).
The month with the least sunshine days is November (2.4 days).
Average UV index in December
Culebra, PR
- 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
Culebra, PR
- Average cloud cover in December: 39
The months with the most cloud cover are May and July (Cloud cover 40).
The month with the least cloud cover is February (Cloud cover 33).
Average visibility in December
Culebra, PR
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
