Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
During the shift to December, a minor reduction in average high-temperature is observed, shifting from a cool 50.7°F (10.4°C) in November to a cold 42.1°F (5.6°C). During the month of December, the temperature in Porto Rico, West Virginia, falls to an average of 30.6°F (-0.8°C).Humidity
The average relative humidity in December is 82%.Rainfall
In Porto Rico, in December, during 12.7 rainfall days, 3.39" (86mm) of precipitation is typically accumulated. Throughout the year, in Porto Rico, there are 186.8 rainfall days, and 38.7" (983mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Porto Rico, in December, during 12.3 snowfall days, 5.43" (138mm) of snow is typically accumulated. Throughout the year, there are 58.9 snowfall days, and 29.41" (747mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Porto Rico.On the first day of the month, sunrise is at 7:24 am and sunset at 5:00 pm. On the last day of December, sunrise is at 7:42 am and sunset at 5:10 pm EST.
Sunshine
In December, the average sunshine is 3.7h.UV index
The months with the lowest UV index in Porto Rico are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 2 in December transforms into this advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Porto Rico?
What is the average humidity in December in Porto Rico?
How many days does it rain in December in Porto Rico?
How many days does it snow in December in Porto Rico?
What is the month with the shortest days in Porto Rico?
How many hours of daylight does Porto Rico have in December?
What time are sunrise and sunset in December in Porto Rico?
How long on average sun shines in December in Porto Rico?
What are the months with the lowest UV index in Porto Rico?
What is the UV index intensity in December in Porto Rico?
Average temperature in December
Porto Rico, WV
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in December
Porto Rico, WV
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Porto Rico, WV
- Average wind speed in December: 6.2mph
The windiest months (with the highest average wind speed) are January and February (6.8mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in December
Porto Rico, WV
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are June, August and November (77%).
Average rainfall in December
Porto Rico, WV
- Average rainfall in December: 3.39"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in December
Porto Rico, WV
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is May (20.6 days).
The month with the least rainy days is November (11.4 days).
Average snowfall in December
Porto Rico, WV
- Average snowfall in December: 5.43"
The month with the highest snowfall is January (7.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Porto Rico, WV
- Average snowfall days in December: 12.3 days
The month with the highest number of snowfall days is January (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Porto Rico, WV
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Porto Rico, WV
- Average sunshine days in December: 9.7 days
The month with the most sunshine days is November (14.9 days).
The month with the least sunshine days is January (7.4 days).
Average UV index in December
Porto Rico, WV
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Porto Rico, WV
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Porto Rico, WV
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Porto Rico, West Virginia, USA
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