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
The onset of December is marked by a minor decrease in temperature, transitioning from a fresh 53.8°F (12.1°C) in November to a frosty 45.9°F (7.7°C). The low-temperature averages to a freezing cold 31.8°F (-0.1°C) during the nights of December.Humidity
The months with the highest humidity are May, September and December, with an average relative humidity of 77%.Rainfall
In New Castle, in December, during 8.6 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In New Castle, during the entire year, the rain falls for 145.5 days and collects up to 25.04" (636mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In New Castle, in December, during 2.2 snowfall days, 2.72" (69mm) of snow is typically accumulated. Throughout the year, there are 12.9 snowfall days, and 11.42" (290mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:16 am and sunset at 5:02 pm. On the last day of December, sunrise is at 7:34 am and sunset at 5:12 pm EST.
Sunshine
In December, the average sunshine is 5.5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 in December translates into these instructions:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What are the most humid months?
What is the average humidity in December?
How many days 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?
When is the sunrise / sunset in December?
How many hours of sunshine does New Castle have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
New Castle, VA
- Average high temperature in December: 45.9°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in December: 31.8°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
New Castle, VA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
New Castle, VA
- Average wind speed in December: 5.9mph
The windiest month (with the highest average wind speed) is February (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in December
New Castle, VA
- Average humidity in December: 77%
The months with the highest relative humidity are May, September and December (77%).
The month with the lowest relative humidity is July (72%).
Average rainfall in December
New Castle, VA
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in December
New Castle, VA
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is November (7.6 days).
Average snowfall in December
New Castle, VA
- Average snowfall in December: 2.72"
The month with the highest snowfall is March (2.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
New Castle, VA
- Average snowfall days in December: 2.2 days
The month with the highest number of snowfall days is February (3.8 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
New Castle, VA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
New Castle, VA
- Average sunshine days in December: 20 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in December
New Castle, VA
- 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
New Castle, VA
- Average cloud cover in December: 42
The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in December
New Castle, VA
- Average visibility in December: 5mi
The months with the highest visibility are June, July and November (6mi).
The months with the lowest visibility are January, February, March, April, May, August, September, October and December (5mi).
New Castle, Virginia, USA
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