December weather forecast
McKinsey Park, MD

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Weather in December

The first month of the winter, December, is also a frosty month in McKinsey Park, Maryland, with an average temperature fluctuating between 34.7°F (1.5°C) and 45.5°F (7.5°C).

Temperature

The onset of December brings a small shift in high-temperatures, falling from a cool 53.8°F (12.1°C) in November to a chilly 45.5°F (7.5°C). During December, McKinsey Park consistently records a temperature low averaging a cold 34.7°F (1.5°C).

Humidity

In McKinsey Park, the average relative humidity in December is 75%.

Rainfall

In McKinsey Park, in December, it is raining for 11.4 days, with typically 2.83" (72mm) of accumulated precipitation. In McKinsey Park, during the entire year, the rain falls for 155.7 days and collects up to 31.22" (793mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In McKinsey Park, in December, snow falls for 2.4 days, with typically accumulated 0.63" (16mm) of snow. Throughout the year, there are 14 snowfall days, and 6.14" (156mm) of snow is accumulated.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:06 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:53 pm EST.

Sunshine

In McKinsey Park, the average sunshine in December is 5.2h.

UV index

January, November 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 low health risk from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 2 during December translates into the following guidance:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.

Frequently asked questions

What is the average December temperature?

An average high-temperature, in December, in McKinsey Park, is 45.5°F (7.5°C) and the average low-temperature is 34.7°F (1.5°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, is computed to be 91.4°F (33°C).

What is the average humidity in December?

In McKinsey Park, the average relative humidity in December is 75%.

How many days does it rain in December?

In McKinsey Park, in December, during 11.4 rainfall days, 2.83" (72mm) of precipitation is typically accumulated.

How much does it snow in December?

In McKinsey Park, during December, snow falls for 2.4 days and regularly aggregates up to 0.63" (16mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

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

When are sunrise and sunset in December?

On the first day of December in McKinsey Park, sunrise is at 7:06 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:53 pm EST.

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

In McKinsey Park, the average sunshine duration in December is 5.2h.

What is the month with the lowest UV index in McKinsey Park?

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

What is the UV index intensity in December?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to 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
McKinsey Park, MD

Average temperature in December - McKinsey Park, MD
  • Average high temperature in December: 45.5°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in December: 34.7°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

Average pressure in December
McKinsey Park, MD

Average pressure in December - McKinsey Park, 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 (29.94"Hg).

Average wind speed in December
McKinsey Park, MD

Average wind speed in December - McKinsey Park, MD
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in December
McKinsey Park, MD

Average humidity in December - McKinsey Park, MD
  • Average humidity in December: 75%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).

Average rainfall in December
McKinsey Park, MD

Average rainfall in December - McKinsey Park, MD
  • Average rainfall in December: 2.83"

The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in December
McKinsey Park, MD

Average rainfall days in December - McKinsey Park, MD
  • Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (9.4 days).

Average snowfall in December
McKinsey Park, MD

Average snowfall in December - McKinsey Park, MD
  • Average snowfall in December: 0.63"

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
McKinsey Park, MD

Average snowfall days in December - McKinsey Park, MD
  • Average snowfall days in December: 2.4 days

The month with the highest number of snowfall days is January (4.4 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
McKinsey Park, MD

Average daylight in December / Average sunshine in December - McKinsey Park, MD
  • 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 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

Average sunshine days in December
McKinsey Park, MD

Average sunshine days in December - McKinsey Park, MD
  • Average sunshine days in December: 16.9 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.8 days).

Average UV index in December
McKinsey Park, MD

Average UV index in December - McKinsey Park, 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, November and December (UV index 2).

Average cloud cover in December
McKinsey Park, MD

Average cloud cover in December - McKinsey Park, MD
  • Average cloud cover in December: 44

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December
McKinsey Park, MD

Average visibility in December - McKinsey Park, MD
  • Average visibility in December: 6mi

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

McKinsey Park, Maryland, USA

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