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
A moderate decline in average high-temperatures is noted in December, moving from a fresh 52.5°F (11.4°C) in November to a frosty 43.7°F (6.5°C). In Round Hill, the average temperature during the nights of December drops to a freezing cold 30.9°F (-0.6°C).Humidity
October and December, with an average relative humidity of 78%, are the most humid months.Rainfall
In Round Hill, in December, during 10.7 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. 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 December, it is snowing for 3.8 days. Throughout December, 2.68" (68mm) of snow is accumulated. In Round Hill, during the entire year, snow falls for 21.9 days and aggregates up to 14.88" (378mm) of snow.Daylight
December has the shortest days of the year in Round Hill, 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 in Round Hill are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
Is it cold in Round Hill during December?
What are the most humid months in Round Hill?
What is the average humidity in December in Round Hill?
How much does it rain in Round Hill in December?
How much does it snow in Round Hill in December?
What is the month with the shortest days in Round Hill?
How many hours of daylight does Round Hill have in December?
When is the sunrise / sunset in December in Round Hill?
What is the month with the least sunshine in Round Hill?
How many hours of sunshine does Round Hill have in December?
When is the lowest UV index in Round Hill?
How high is the UV index in December in Round Hill?
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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