December weather forecast
Vega Alta, PR

Weather in December

December, the first month of the winter in Vega Alta, is also a moderately hot month, with an average temperature varying between 81°F (27.2°C) and 75.2°F (24°C).

Temperature

In December, the average high-temperature is relatively the same as in November - a still warm 81°F (27.2°C). In December, in Vega Alta, the average low-temperature is 75.2°F (24°C).

Heat index

The average heat index in December is appraised at 86°F (30°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, metabolic differences, differences in body mass, height, and shape), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in December in Vega Alta is 78%.

Rainfall

In Vega Alta, in December, during 17.5 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, there are 223.5 rainfall days, and 27.95" (710mm) of precipitation is accumulated.

Daylight

December has the shortest days of the year in Vega Alta, with an average of 11h and 3min of daylight.
On the first day of December, sunrise is at 6:41 am and sunset at 5:47 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 5:59 pm AST.

Sunshine

The average sunshine in December in Vega Alta is 6.8h.

UV index

January through April and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 in December transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.
[Resources]

FAQ

What is the temperature in December in Vega Alta?

The average high-temperature, in December, in Vega Alta, is 81°F (27.2°C), while the average low-temperature is 75.2°F (24°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in December is appraised at 86°F (30°C).

What is the average humidity in December in Vega Alta?

In Vega Alta, the average relative humidity in December is 78%.

How many days does it rain in December in Vega Alta?

In Vega Alta, during December, the rain falls for 17.5 days and regularly aggregates up to 1.61" (41mm) of precipitation.

What is the month with the shortest days in Vega Alta?

The month with the shortest days in Vega Alta is December, with an average of 11h and 3min of daylight.

How many hours of daylight does Vega Alta have in December?

The average day length in December in Vega Alta, Puerto Rico, is 11h and 3min.

When is the sunrise / sunset in December in Vega Alta?

On the first day of December, sunrise is at 6:41 am and sunset at 5:47 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 5:59 pm AST.

How many hours of sunshine does Vega Alta have in December?

In Vega Alta, Puerto Rico, the average sunshine duration in December is 6.8h.

What is the month with the lowest UV index in Vega Alta?

January through April and December, with an average maximum UV index of 6, are months with the lowest UV index.

What is the UV index reading in December in Vega Alta?

The average daily maximum UV index in December in Vega Alta is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Vega Alta, PR

Average temperature in December - Vega Alta, PR
  • Average high temperature in December: 81°F

The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (79.9°F).

  • Average low temperature in December: 75.2°F

The months with the highest average low temperature are August, September and October (78.4°F).
The coldest month (with the lowest average low temperature) is March (73°F).

[Resources]

Average pressure in December
Vega Alta, PR

Average pressure in December - Vega Alta, PR
  • Average pressure in December: 29.98"Hg

The months with the highest atmospheric pressure are January and February (30.02"Hg).
The month with the lowest atmospheric pressure is October (29.9"Hg).

[Resources]

Average wind speed in December
Vega Alta, PR

Average wind speed in December - Vega Alta, PR
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is July (10mph).
The calmest month (with the lowest average wind speed) is October (6.8mph).

[Resources]

Average humidity in December
Vega Alta, PR

Average humidity in December - Vega Alta, PR
  • Average humidity in December: 78%

The months with the highest relative humidity are May, June, July and November (79%).
The month with the lowest relative humidity is March (76%).

[Resources]

Average rainfall in December
Vega Alta, PR

Average rainfall in December - Vega Alta, PR
  • Average rainfall in December: 1.61"

The wettest month (with the highest rainfall) is October (3.82").
The driest month (with the least rainfall) is February (0.94").

[Resources]

Average rainfall days in December
Vega Alta, PR

Average rainfall days in December - Vega Alta, PR
  • Average rainfall days in December: 17.5 days

The month with the highest number of rainy days is October (24 days).
The months with the least rainy days are January and February (14.2 days).

[Resources]

Average daylight in December /
Average sunshine in December
Vega Alta, PR

Average daylight in December / Average sunshine in December - Vega Alta, PR
  • Average daylight in December: 11h and 3min

The month with the longest days is June (Average daylight: 13h and 13min).
The month with the shortest days is December (Average daylight: 11h and 3min).

  • Average sunshine in December: 6h and 48min

The months with the most sunshine are May and June (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).

[Resources]

Average sunshine days in December
Vega Alta, PR

Average sunshine days in December - Vega Alta, PR
  • Average sunshine days in December: 7.5 days

The month with the most sunshine days is January (9.8 days).
The months with the least sunshine days are October and November (3.5 days).

[Resources]

Average UV index in December
Vega Alta, PR

Average UV index in December - Vega Alta, PR
  • Average UV index in December: 6

The months with the highest UV index are May, June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April and December (UV index 6).

[Resources]

Average cloud cover in December
Vega Alta, PR

Average cloud cover in December - Vega Alta, PR
  • Average cloud cover in December: 33

The months with the most cloud cover are May, July and November (Cloud cover 34).
The month with the least cloud cover is September (Cloud cover 26).

[Resources]

Average visibility in December
Vega Alta, PR

Average visibility in December - Vega Alta, 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location