December weather forecast
Upperville, VA

Weather in December

The first month of the winter, December, is also a frosty month in Upperville, Virginia, with an average temperature fluctuating between 43.5°F (6.4°C) and 30.4°F (-0.9°C).

Temperature

In December, the average high-temperature marginally drops from a fresh 52.3°F (11.3°C) in November to a chilly 43.5°F (6.4°C). In Upperville, Virginia, in December, the average low-temperature is 30.4°F (-0.9°C).

Humidity

The months with the highest humidity are May, October and December, with an average relative humidity of 78%.

Rainfall

In Upperville, in December, during 9.3 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. In Upperville, during the entire year, the rain falls for 152.4 days and collects up to 23.5" (597mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Upperville, during 3 snowfall days, 1.54" (39mm) of snow is typically accumulated. Throughout the year, there are 19.9 snowfall days, and 9.69" (246mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 29min of daylight.
On the first day of the month, sunrise is at 7:11 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:59 pm EST.

Sunshine

January and December, with an average of 5h of sunshine, are months with the least sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Upperville, Virginia. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Upperville?

In December, in Upperville, the average high-temperature is 43.5°F (6.4°C), and the average low-temperature is 30.4°F (-0.9°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is evaluated at 93.2°F (34°C).

What is the most humid month in Upperville?

May, October and December, with an average relative humidity of 78%, are most humid months.

What is the average humidity in December in Upperville?

In Upperville, the average relative humidity in December is 78%.

How much does it rain in Upperville in December?

In Upperville, during December, the rain falls for 9.3 days and regularly aggregates up to 1.65" (42mm) of precipitation.

How many days does it snow in December in Upperville?

In Upperville, in December, snow falls for 3 days, with typically accumulated 1.54" (39mm) of snow.

What is the month with the shortest days in Upperville?

December has the shortest days of the year in Upperville, with an average of 9h and 29min of daylight.

How many hours of daylight does Upperville have in December?

In December, the average day length in Upperville, Virginia, is 9h and 29min.

When are sunrise and sunset in December in Upperville?

In December, on the first day of the month, sunrise is at 7:11 am and sunset at 4:49 pm. On the last day of the month, in Upperville, Virginia, sunrise is at 7:30 am and sunset at 4:59 pm EST.

What are the months with the least sunshine in Upperville?

The months with the least sunshine are January and December, with an average of 5h of sunshine.

How many hours of sunshine does Upperville have in December?

The average sunshine duration in December in Upperville, Virginia, is 5h.

What is the month with the lowest UV index in Upperville?

The months with the lowest UV index in Upperville, Virginia, are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Upperville?

In Upperville, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Upperville, VA

Average temperature in December - Upperville, VA
  • Average high temperature in December: 43.5°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 (38.3°F).

  • Average low temperature in December: 30.4°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).

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Average pressure in December
Upperville, VA

Average pressure in December - Upperville, 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).

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Average wind speed in December
Upperville, VA

Average wind speed in December - Upperville, VA
  • Average wind speed in December: 6.3mph

The windiest months (with the highest average wind speed) are March and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in December
Upperville, VA

Average humidity in December - Upperville, VA
  • Average humidity in December: 78%

The months with the highest relative humidity are May, October and December (78%).
The month with the lowest relative humidity is July (73%).

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Average rainfall in December
Upperville, VA

Average rainfall in December - Upperville, VA
  • Average rainfall in December: 1.65"

The wettest months (with the highest rainfall) are May, July and August (2.68").
The driest month (with the least rainfall) is January (1.3").

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Average rainfall days in December
Upperville, VA

Average rainfall days in December - Upperville, VA
  • Average rainfall days in December: 9.3 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in December
Upperville, VA

Average snowfall in December - Upperville, VA
  • Average snowfall in December: 1.54"

The month with the highest snowfall is January (2.68").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Upperville, VA

Average snowfall days in December - Upperville, VA
  • Average snowfall days in December: 3 days

The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Upperville, VA

Average daylight in December / Average sunshine in December - Upperville, VA
  • Average daylight in December: 9h and 29min

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

  • Average sunshine in December: 5h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 5h and 0min).

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Average sunshine days in December
Upperville, VA

Average sunshine days in December - Upperville, VA
  • Average sunshine days in December: 18.4 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.5 days).

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Average UV index in December
Upperville, VA

Average UV index in December - Upperville, 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).

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Average cloud cover in December
Upperville, VA

Average cloud cover in December - Upperville, VA
  • Average cloud cover in December: 47

The months with the most cloud cover are March and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in December
Upperville, VA

Average visibility in December - Upperville, VA
  • Average visibility in December: 5mi

The months with the highest visibility are January, February, March, April, June, July, August and November (6mi).
The months with the lowest visibility are May, September, October and December (5mi).

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