December weather forecast and climate
Colonial Village, DC

The first month of the winter, December, is still a chilly month in Colonial Village, District of Columbia, with average temperature varying between 34.2°F (1.2°C) and 46°F (7.8°C).

Temperature

In Colonial Village, the average high-temperature slightly decreases, from a cool 54.9°F (12.7°C) in November, to a frosty 46°F (7.8°C). In December, the average low-temperature is 34.2°F (1.2°C).

Humidity

The average relative humidity in December is 75%.

Rainfall

In December, the rain falls for 10 days. Throughout December, 1.93" (49mm) of precipitation is accumulated. Throughout the year, there are 149.1 rainfall days, and 26.14" (664mm) of precipitation is accumulated.

Snowfall

January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 1.7 snowfall days, it receives 0.79" (20mm) of snow. In Colonial Village, during the entire year, snow falls for 11.7 days, and aggregates up to 6.3" (160mm) of snow.

Daylight

With an average of 9.5h of daylight, December has the shortest days of the year.

Sunshine

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

UV index

Months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Colonial Village?

In Colonial Village, in December, the average high-temperature is 46°F (7.8°C), and the average low-temperature is 34.2°F (1.2°C).

What is the average humidity in December in Colonial Village?

The average relative humidity in December in Colonial Village, District of Columbia, is 75%.

How many days does it rain in December in Colonial Village?

In Colonial Village, during December, the rain falls for 10 days and regularly aggregates up to 1.93" (49mm) of precipitation.

When does it start snowing in Colonial Village?

December is the first month it typically snows in Colonial Village. Throughout December, in the average 1.7 snowfall days, it receives 0.79" (20mm) of snow.

What is the month with the shortest days in Colonial Village?

With an average of 9.5h of daylight, December has the shortest days of the year in Colonial Village.

What is the average length of the day in December in Colonial Village?

In December, the average length of the day in Colonial Village, District of Columbia, is 9.5h.

What is the month with the least sunshine in Colonial Village?

Months with the least sunshine in Colonial Village are January, February and December, with an average of 5.1h of sunshine.

How long on average sun shines in December in Colonial Village?

In December, the average sunshine in Colonial Village, District of Columbia, is 5.1h.

What are the months with the lowest UV index in Colonial Village?

Months with the lowest UV index in Colonial Village are January and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Colonial Village?

In Colonial Village, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV rays.
Average temperature in December - Colonial Village, DC
  • Average high temperature in December: 46°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in December: 34.2°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).

Average pressure in December - Colonial Village, DC
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is November (30.14").
The month with the lowest atmospheric pressure is June (29.95").

Average wind speed in December - Colonial Village, DC
  • Average wind speed in December: 7mph

The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in December - Colonial Village, DC
  • Average humidity in December: 75%

The month with the highest relative humidity is May (76%).
Months with the lowest relative humidity are April and July (71%).

Average rainfall in December - Colonial Village, DC
  • Average rainfall in December: 1.93"

The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is January (1.57").

Average rainfall days in December - Colonial Village, DC
  • Average rainfall days in December: 10 days

The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is November (8.1 days).

Average snowfall in December - Colonial Village, DC
  • Average snowfall in December: 0.79"

The month with the highest snowfall is January (2.17").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December - Colonial Village, DC
  • Average snowfall days in December: 1.7 days

Months with the highest number of snowfall days are January and February (3.8 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in December / Average sunshine in December - Colonial Village, DC
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.1h

The month with the most sunshine is July (Average sunshine: 10.7h).
Months with the least sunshine are January, February and December (Average sunshine: 5.1).

Average sunshine days in December - Colonial Village, DC
  • Average sunshine days in December: 19 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (12.8 days).

Average UV index in December - Colonial Village, DC
  • Average UV index in December: 2

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January and December (UV index 2).

Average cloud cover in December - Colonial Village, DC
  • Average cloud cover in December: 45

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in December - Colonial Village, DC
  • Average visibility in December: 6mi

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