December weather forecast
Perry Hall, MD

Weather in December

The first month of the winter, December, is also a frosty month in Perry Hall, Maryland, with average temperature ranging between min 33.4°F (0.8°C) and max 44.8°F (7.1°C).

Temperature

In Perry Hall, the average high-temperature slightly decreases, from a cool 53.2°F (11.8°C) in November, to a chilly 44.8°F (7.1°C). In December, in Perry Hall, the average low-temperature is 33.4°F (0.8°C).

Humidity

The average relative humidity is 77%.

Rainfall

In Perry Hall, Maryland, during December, the rain falls for 9.9 days and regularly aggregates up to 2.4" (61mm) of precipitation. Throughout the year, there are 156.8 rainfall days, and 30.67" (779mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Perry Hall are January through March, November and December. In Perry Hall, in December, snow falls for 1.7 days, with typically accumulated 0.71" (18mm) of snow. In Perry Hall, during the entire year, snow falls for 11.3 days, and aggregates up to 5.55" (141mm) of snow.

Daylight

With an average of 9.4h of daylight, December has the shortest days of the year in Perry Hall.

Sunshine

In Perry Hall, the average sunshine is 5.2h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in December in Perry Hall?

In December, the average relative humidity is 77%.

How many days does it rain in December in Perry Hall?

In December, in Perry Hall, the rain falls for 9.9 days. Throughout December, 2.4" (61mm) of precipitation is accumulated.

How much does it snow in Perry Hall in December?

In Perry Hall, Maryland, during December, snow falls for 1.7 days and regularly aggregates up to 0.71" (18mm) of snow.

What is the month with the shortest days in Perry Hall?

With an average of 9.4h of daylight, December has the shortest days of the year in Perry Hall.

What is the average length of the day in December in Perry Hall?

The average length of the day in December in Perry Hall, Maryland, is 9.4h.

How many hours of sunshine does Perry Hall have in December?

The average sunshine in December is 5.2h.

What is the month with the lowest UV index in Perry Hall?

Months with the lowest UV index in Perry Hall are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Perry Hall?

In Perry Hall, 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 the Sun's UV rays.

Average temperature in December
Perry Hall, MD

Average temperature in December - Perry Hall, MD
  • Average high temperature in December: 44.8°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (38.5°F).

  • Average low temperature in December: 33.4°F

The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (27°F).

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Average pressure in December
Perry Hall, MD

Average pressure in December - Perry Hall, MD
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is November (30.13").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in December
Perry Hall, MD

Average wind speed in December - Perry Hall, MD
  • Average wind speed in December: 8.5mph

The windiest months (with the highest average wind speed) are January, February and March (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in December
Perry Hall, MD

Average humidity in December - Perry Hall, MD
  • Average humidity in December: 77%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in December
Perry Hall, MD

Average rainfall in December - Perry Hall, MD
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in December
Perry Hall, MD

Average rainfall days in December - Perry Hall, MD
  • Average rainfall days in December: 9.9 days

Months with the highest number of rainy days are May and July (17.6 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in December
Perry Hall, MD

Average snowfall in December - Perry Hall, MD
  • Average snowfall in December: 0.71"

The month with the highest snowfall is January (1.85").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Perry Hall, MD

Average snowfall days in December - Perry Hall, MD
  • Average snowfall days in December: 1.7 days

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

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Average daylight in December /
Average sunshine in December
Perry Hall, MD

Average daylight in December / Average sunshine in December - Perry Hall, MD
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.2h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in December
Perry Hall, MD

Average sunshine days in December - Perry Hall, MD
  • Average sunshine days in December: 18.7 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (10.8 days).

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Average UV index in December
Perry Hall, MD

Average UV index in December - Perry Hall, MD
  • Average UV index in December: 2

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Perry Hall, MD

Average cloud cover in December - Perry Hall, MD
  • Average cloud cover in December: 44

Months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in December
Perry Hall, MD

Average visibility in December - Perry Hall, MD
  • Average visibility in December: 6mi

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

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