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
In December, the meteorological conditions alter, with the average high-temperature shifting from a cool 52.2°F (11.2°C) in November to a wintry 42.4°F (5.8°C). December in Port Royal sees the temperature falling to a mean low of 31.1°F (-0.5°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 81%.Rainfall
In Port Royal, in December, during 12 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. In Port Royal, during the entire year, the rain falls for 174.2 days and collects up to 36.1" (917mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Port Royal, in December, snow falls for 6.8 days, with typically accumulated 1.69" (43mm) of snow. In Port Royal, during the entire year, snow falls for 29.5 days and aggregates up to 8.74" (222mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:39 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 5:29 pm EST.
Sunshine
In Port Royal, the average sunshine in December is 4.3h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December in Port Royal?
How many hours of sunshine does Port Royal have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Port Royal, KY
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Port Royal, KY
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Port Royal, KY
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).
Average humidity in December
Port Royal, KY
- Average humidity in December: 81%
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are August, September and October (75%).
Average rainfall in December
Port Royal, KY
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is April (4.06").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in December
Port Royal, KY
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (10.4 days).
Average snowfall in December
Port Royal, KY
- Average snowfall in December: 1.69"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Port Royal, KY
- Average snowfall days in December: 6.8 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Port Royal, KY
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Port Royal, KY
- Average sunshine days in December: 13.9 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in December
Port Royal, KY
- Average UV index in December: 2
The months with the highest UV index are 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
Port Royal, KY
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Port Royal, KY
- Average visibility in December: 5mi
The months with the highest visibility are March, April, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, May, July and December (5mi).
Port Royal, Kentucky, USA
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