December weather forecastPunta Santiago, PR
December
Weather in December
By December, the weather in Punta Santiago has cooled considerably. The sea temperature drops significantly affecting the overall temperature and atmospheric pressure. The decrease in daylight hours is offset by a reduction in cloud cover, allowing for a greater amount of sunshine. Even with longer nights, the uv-index continues to register a rating of 7. Amidst these changes, the lower temperature dips to around 75.7°F (24.3°C) with rainfall measures lowering to 2.68" (68mm) over approximately 21.4 days.Temperature
The arrival of December records an average high-temperature of a still moderately hot 80.6°F (27°C), closely related to the 82.4°F (28°C) observed in November. In December, Punta Santiago's nighttime temperatures demonstrate a slight decrease, stabilizing at an average of 75.7°F (24.3°C).Heat index
The heat index value for December is estimated at a tropical 86°F (30°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.It is emphasized that the heat index's values are meant for shaded zones with mild winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Humidity
In Punta Santiago, Puerto Rico, the average relative humidity in December is 79%.Rainfall
In December, the rain falls for 21.4 days. Throughout December, 2.68" (68mm) of precipitation is accumulated. Throughout the year, there are 268.8 rainfall days, and 38.58" (980mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature is 81.9°F (27.7°C).Note: In any water activity, temperatures between 77°F (25°C) and 84.2°F (29°C) are viewed as magnificent and exceptionally pleasant for prolonged enjoyment.
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 6:38 am and sunset at 5:45 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 5:58 pm AST.
Sunshine
December has the least sunshine of the year, with an average of 6.4h of sunshine.UV index
April through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 7 during December leads to these instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Attention! The combination of sand and water reflections enhances UV ray intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Punta Santiago, PR
- Average high temperature in December: 80.6°F
The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is February (79.3°F).
- Average low temperature in December: 75.7°F
The months with the highest average low temperature are September and October (78.6°F).
The coldest month (with the lowest average low temperature) is March (73.6°F).
Average pressure in December
Punta Santiago, PR
- Average pressure in December: 29.98"Hg
The month with the highest atmospheric pressure is January (30.02"Hg).
The month with the lowest atmospheric pressure is October (29.9"Hg).
Average wind speed in December
Punta Santiago, PR
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is July (10.2mph).
The calmest month (with the lowest average wind speed) is October (7.1mph).
Average humidity in December
Punta Santiago, PR
- Average humidity in December: 79%
The months with the highest relative humidity are May, July, August and November (80%).
The months with the lowest relative humidity are February and March (77%).
Average rainfall in December
Punta Santiago, PR
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is August (4.76").
The driest month (with the least rainfall) is February (1.77").
Average rainfall days in December
Punta Santiago, PR
- Average rainfall days in December: 21.4 days
The month with the highest number of rainy days is May (26.3 days).
The month with the least rainy days is February (17.1 days).
Average sea temperature in December
Punta Santiago, PR
- Average sea temperature in December: 81.7°F
The best month for swimming (with the highest average sea temperature) is September (85°F).
The coldest month (with the lowest average sea temperature) is February (78.7°F).
Average daylight in December /
Average sunshine in December
Punta Santiago, 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 24min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in December
Punta Santiago, PR
- Average sunshine days in December: 5.1 days
The month with the most sunshine days is January (6.8 days).
The month with the least sunshine days is August (1.1 days).
Average UV index in December
Punta Santiago, PR
- Average UV index in December: 7
The months with the highest UV index are April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February and March (UV index 6).
Average cloud cover in December
Punta Santiago, PR
- Average cloud cover in December: 40
The months with the most cloud cover are May and July (Cloud cover 41).
The months with the least cloud cover are February and September (Cloud cover 33).
Average visibility in December
Punta Santiago, 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).
