December weather forecast
Unison, VA

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Weather in December

December, the first month of the winter in Unison, is still a chilly month, with an average temperature ranging between min 30.9°F (-0.6°C) and max 43.7°F (6.5°C).

Temperature

The shift from November to December includes a small decrease in the average high-temperature, from a fresh 52.5°F (11.4°C) to a chilly 43.7°F (6.5°C). Unison's temperature in December lowers to a consistent average of 30.9°F (-0.6°C) during the nights.

Humidity

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

Rainfall

In December, the rain falls for 10.7 days. Throughout December, 2.6" (66mm) of precipitation is accumulated. Throughout the year, there are 162.2 rainfall days, and 31.1" (790mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. In December, it is snowing for 3.8 days. Throughout December, 2.68" (68mm) of snow is accumulated. In Unison, during the entire year, snow falls for 21.9 days and aggregates up to 14.88" (378mm) of snow.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:11 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:29 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 unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 2 during December leads to these instructions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.

Frequently asked questions

How cold does it get in December?

In December, in Unison, the average high-temperature is 43.7°F (6.5°C), and the average low-temperature is 30.9°F (-0.6°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in August is computed to be 93.2°F (34°C).

What are the most humid months?

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

What is the average humidity in December?

The average relative humidity in December is 78%.

How many days does it rain in December?

In Unison, during December, the rain falls for 10.7 days and regularly aggregates up to 2.6" (66mm) of precipitation.

How much does it snow in December?

In Unison, in December, during 3.8 snowfall days, 2.68" (68mm) of snow is typically accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 30min of daylight.

What is the average length of the day in December in Unison?

The average day length in December is 9h and 29min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:11 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:58 pm EST.

What are the months with the least sunshine?

The months with the least sunshine are January and December, with an average of 5.1h of sunshine.

How many hours of sunshine does Unison have in December?

In December, the average sunshine duration is 5.1h.

When is the lowest UV index?

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

What is the UV index intensity in December?

In Unison, Virginia, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
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
Unison, VA

Average temperature in December - Unison, 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
Unison, VA

Average pressure in December - Unison, 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
Unison, VA

Average wind speed in December - Unison, 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
Unison, VA

Average humidity in December - Unison, 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
Unison, VA

Average rainfall in December - Unison, 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
Unison, VA

Average rainfall days in December - Unison, 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
Unison, VA

Average snowfall in December - Unison, 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
Unison, VA

Average snowfall days in December - Unison, 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
Unison, VA

Average daylight in December / Average sunshine in December - Unison, 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
Unison, VA

Average sunshine days in December - Unison, 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
Unison, VA

Average UV index in December - Unison, 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
Unison, VA

Average cloud cover in December - Unison, 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
Unison, VA

Average visibility in December - Unison, 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).

Unison, Virginia, USA

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