December weather forecast
Waldorf, MD

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Weather in December

The first month of the winter, December, is still a chilly month in Waldorf, Maryland, with an average temperature varying between 34.5°F (1.4°C) and 46.9°F (8.3°C).

Temperature

With the onset of December, Waldorf's average high-temperature slightly adjusts, moderately receding from November's cool 55°F (12.8°C) to a chilly 46.9°F (8.3°C). Waldorf experiences an average low-temperature of 34.5°F (1.4°C) in the month of December.

Humidity

In Waldorf, the average relative humidity in December is 77%.

Rainfall

In Waldorf, in December, it is raining for 11.5 days, with typically 2.28" (58mm) of accumulated precipitation. Throughout the year, there are 151.4 rainfall days, and 29.33" (745mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Waldorf, in December, snow falls for 2 days, with typically accumulated 1.02" (26mm) of snow. In Waldorf, during the entire year, snow falls for 13.5 days and aggregates up to 7.24" (184mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of December, sunrise is at 7:07 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:56 pm EST.

Sunshine

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

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 2 in December translates into these instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.

Frequently asked questions

What is the average December temperature?

In December, in Waldorf, the average high-temperature is 46.9°F (8.3°C), and the average low-temperature is 34.5°F (1.4°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in August is estimated at 95°F (35°C).

What is the average humidity in December?

In Waldorf, the average relative humidity in December is 77%.

How much does it rain in December?

In Waldorf, in December, it is raining for 11.5 days, with typically 2.28" (58mm) of accumulated precipitation.

How much does it snow in December?

In Waldorf, in December, snow falls for 2 days, with typically accumulated 1.02" (26mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

In December, the average day length is 9h and 31min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:07 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:56 pm EST.

What is the month with the least sunshine?

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

How long on average sun shines in December in Waldorf?

In December, the average sunshine duration is 5h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability 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
Waldorf, MD

Average temperature in December - Waldorf, MD
  • Average high temperature in December: 46.9°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in December: 34.5°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

Average pressure in December
Waldorf, MD

Average pressure in December - Waldorf, MD
  • 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
Waldorf, MD

Average wind speed in December - Waldorf, MD
  • Average wind speed in December: 6.7mph

The windiest months (with the highest average wind speed) are March and April (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

Average humidity in December
Waldorf, MD

Average humidity in December - Waldorf, MD
  • Average humidity in December: 77%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March and April (73%).

Average rainfall in December
Waldorf, MD

Average rainfall in December - Waldorf, MD
  • Average rainfall in December: 2.28"

The wettest month (with the highest rainfall) is August (3.31").
The driest month (with the least rainfall) is January (1.85").

Average rainfall days in December
Waldorf, MD

Average rainfall days in December - Waldorf, MD
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is November (8.7 days).

Average snowfall in December
Waldorf, MD

Average snowfall in December - Waldorf, MD
  • Average snowfall in December: 1.02"

The month with the highest snowfall is January (2.32").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Waldorf, MD

Average snowfall days in December - Waldorf, MD
  • Average snowfall days in December: 2 days

The month with the highest number of snowfall days is January (4.3 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
Waldorf, MD

Average daylight in December / Average sunshine in December - Waldorf, MD
  • 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 0min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 5h and 0min).

Average sunshine days in December
Waldorf, MD

Average sunshine days in December - Waldorf, MD
  • Average sunshine days in December: 16.9 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (11.4 days).

Average UV index in December
Waldorf, MD

Average UV index in December - Waldorf, MD
  • 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 and December (UV index 2).

Average cloud cover in December
Waldorf, MD

Average cloud cover in December - Waldorf, MD
  • 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 32).

Average visibility in December
Waldorf, MD

Average visibility in December - Waldorf, MD
  • Average visibility in December: 6mi

The 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).

Waldorf, Maryland, USA

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