December weather forecast
Manassas Park, VA

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Weather in December

December proves to be the harbinger of winter in Manassas Park, with significantly lower temperatures compared to November. Snow makes a comeback, covering the city in a blanket of white, an unmistakable winter indicator. The cold months see the return of more frequent rainfall, adding to the typical winter chill. The elegance of December's winter finds release in the added layers of clothing and warm beverages, bidding farewell to the year on a cool note.

Temperature

With the onset of December, Manassas Park experiences a modest temperature adjustment, with the average high-temperature gently receding from a cool 54.5°F (12.5°C) in November to a frosty 45.7°F (7.6°C). Manassas Park experiences a nighttime temperature average of 32.4°F (0.2°C) during December.

Humidity

The most humid month in Manassas Park is December, with an average relative humidity of 78%.

Rainfall

In Manassas Park, in December, it is raining for 10.3 days, with typically 2.56" (65mm) of accumulated precipitation. Throughout the year, there are 157.5 rainfall days, and 30.35" (771mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Manassas Park are January through April, November and December. In Manassas Park, in December, snow falls for 2.5 days, with typically accumulated 1.61" (41mm) of snow. In Manassas Park, during the entire year, snow falls for 15.8 days and aggregates up to 11.5" (292mm) of snow.

Daylight

December has the shortest days of the year in Manassas Park, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:09 am and sunset at 4:48 pm. On the last day of December, in Manassas Park, sunrise is at 7:27 am and sunset at 4:58 pm EST.

Sunshine

January, February and December, with an average of 5.2h of sunshine, are months with the least sunshine in Manassas Park.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Manassas Park. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, a regular UV index of 2 translates into these guidelines:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Manassas Park in December?

The average high-temperature, in December, in Manassas Park, is 45.7°F (7.6°C), while the average low-temperature is 32.4°F (0.2°C). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in August is appraised at 96.8°F (36°C).

What is the most humid month in Manassas Park?

The most humid month in Manassas Park is December, with an average relative humidity of 78%.

What is the average humidity in December in Manassas Park?

The average relative humidity in December in Manassas Park is 78%.

How much does it rain in Manassas Park in December?

In Manassas Park, during December, the rain falls for 10.3 days and regularly aggregates up to 2.56" (65mm) of precipitation.

How much does it snow in Manassas Park in December?

In Manassas Park, in December, during 2.5 snowfall days, 1.61" (41mm) of snow is typically accumulated.

What is the month with the shortest days in Manassas Park?

The month with the shortest days in Manassas Park is December, with an average of 9h and 30min of daylight.

How many hours of daylight does Manassas Park have in December?

In Manassas Park, Virginia, the average day length in December is 9h and 31min.

What time are sunrise and sunset in December in Manassas Park?

On the first day of December in Manassas Park, Virginia, sunrise is at 7:09 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:58 pm EST.

What are the months with the least sunshine in Manassas Park?

The months with the least sunshine in Manassas Park, Virginia, are January, February and December, with an average of 5.2h of sunshine.

How long on average sun shines in December in Manassas Park?

The average sunshine duration in December is 5.2h.

What are the months with the lowest UV index in Manassas Park?

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

How high is the UV index in December in Manassas Park?

The average daily maximum UV index in December in Manassas Park is 2. A UV Index reading of 2, and below, represents 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
Manassas Park, VA

Average temperature in December - Manassas Park, VA
  • Average high temperature in December: 45.7°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in December: 32.4°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

Average pressure in December
Manassas Park, VA

Average pressure in December - Manassas Park, 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
Manassas Park, VA

Average wind speed in December - Manassas Park, VA
  • Average wind speed in December: 6mph

The windiest months (with the highest average wind speed) are March and April (7mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

Average humidity in December
Manassas Park, VA

Average humidity in December - Manassas Park, VA
  • Average humidity in December: 78%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (72%).

Average rainfall in December
Manassas Park, VA

Average rainfall in December - Manassas Park, VA
  • Average rainfall in December: 2.56"

The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is September (1.93").

Average rainfall days in December
Manassas Park, VA

Average rainfall days in December - Manassas Park, VA
  • Average rainfall days in December: 10.3 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is November (9.3 days).

Average snowfall in December
Manassas Park, VA

Average snowfall in December - Manassas Park, VA
  • Average snowfall in December: 1.61"

The month with the highest snowfall is January (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Manassas Park, VA

Average snowfall days in December - Manassas Park, VA
  • Average snowfall days in December: 2.5 days

The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Manassas Park, VA

Average daylight in December / Average sunshine in December - Manassas Park, VA
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
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 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 12min).

Average sunshine days in December
Manassas Park, VA

Average sunshine days in December - Manassas Park, VA
  • Average sunshine days in December: 17.3 days

The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (11.7 days).

Average UV index in December
Manassas Park, VA

Average UV index in December - Manassas Park, 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
Manassas Park, VA

Average cloud cover in December - Manassas Park, VA
  • Average cloud cover in December: 45

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Manassas Park, VA

Average visibility in December - Manassas Park, 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).

Manassas Park, Virginia, USA

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