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
Round Hill's weather in December involves a mild decrease in the average high-temperature, moving down slightly from November's cool 52.5°F (11.4°C) to a frosty 43.7°F (6.5°C). During December, Round Hill consistently records a temperature low averaging a subzero cold 30.9°F (-0.6°C).Humidity
The months with the highest humidity are October and December, with an average relative humidity of 78%.Rainfall
In Round Hill, during December, the rain falls for 10.7 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Round Hill, during the entire year, the rain falls for 162.2 days and collects up to 31.1" (790mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Round Hill, in December, during 3.8 snowfall days, 2.68" (68mm) of snow is typically accumulated. Throughout the year, there are 21.9 snowfall days, and 14.88" (378mm) of snow is accumulated.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 7:11 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:58 pm EST.
Sunshine
The months with the least sunshine are January and December, with an average of 5.1h of sunshine.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 of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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 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 in Round Hill?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Round Hill, VA
- Average high temperature in December: 43.7°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 (38.7°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in December
Round Hill, VA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Round Hill, VA
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is March (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Round Hill, VA
- Average humidity in December: 78%
The months with the highest relative humidity are October and December (78%).
The month with the lowest relative humidity is July (73%).
Average rainfall in December
Round Hill, VA
- Average rainfall in December: 2.6"
The wettest months (with the highest rainfall) are May and August (3.35").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Round Hill, VA
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (10.1 days).
Average snowfall in December
Round Hill, VA
- Average snowfall in December: 2.68"
The month with the highest snowfall is January (4.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Round Hill, VA
- Average snowfall days in December: 3.8 days
The month with the highest number of snowfall days is January (6.8 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
Round Hill, VA
- 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: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 6min).
Average sunshine days in December
Round Hill, VA
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in December
Round Hill, 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
Round Hill, VA
- Average cloud cover in December: 46
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Round Hill, VA
- Average visibility in December: 5mi
The months with the highest visibility are February, March, April, June, July, August and November (6mi).
The months with the lowest visibility are January, May, September, October and December (5mi).
Round Hill, Virginia, USA
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