December weather forecast
Mill Brothers Hills, MD

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Weather in December

December, the first month of the winter in Mill Brothers Hills, is also a wintry month, with an average temperature fluctuating between 30.4°F (-0.9°C) and 42.6°F (5.9°C).

Temperature

Mill Brothers Hills's transition into December involves a gentle shift in temperature, receding from a fresh 51.3°F (10.7°C) in November to a wintry 42.6°F (5.9°C). Mill Brothers Hills registers a consistent average low-temperature of 30.4°F (-0.9°C) during December.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Mill Brothers Hills, in December, it is raining for 9.8 days, with typically 1.77" (45mm) of accumulated precipitation. In Mill Brothers Hills, during the entire year, the rain falls for 157.5 days and collects up to 27.52" (699mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Mill Brothers Hills, during December, snow falls for 3.9 days and regularly aggregates up to 1.57" (40mm) of snow. Throughout the year, there are 22.3 snowfall days, and 9.76" (248mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:10 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:54 pm EST.

Sunshine

The average sunshine in December is 5h.

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 reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. It's recommended to limit sun exposure when its radiation is at its peak during midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.

Frequently asked questions

Is it cold during December?

In Mill Brothers Hills, in December, the average high-temperature is 42.6°F (5.9°C), and the average low-temperature is 30.4°F (-0.9°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in August is calculated to be 87.8°F (31°C).

What is the average humidity in December in Mill Brothers Hills?

In December, the average relative humidity in Mill Brothers Hills, Maryland, is 79%.

How much does it rain in December?

In Mill Brothers Hills, in December, it is raining for 9.8 days, with typically 1.77" (45mm) of accumulated precipitation.

How many days does it snow in December?

In Mill Brothers Hills, in December, snow falls for 3.9 days, with typically accumulated 1.57" (40mm) of snow.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In Mill Brothers Hills, Maryland, the average day length in December is 9h and 26min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:10 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:54 pm EST.

How many hours of sunshine does Mill Brothers Hills have in December?

The average sunshine duration in December is 5h.

When is the lowest UV index?

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

How high is the UV index in December?

In Mill Brothers Hills, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health 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
Mill Brothers Hills, MD

Average temperature in December - Mill Brothers Hills, MD
  • Average high temperature in December: 42.6°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in December: 30.4°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).

Average pressure in December
Mill Brothers Hills, MD

Average pressure in December - Mill Brothers Hills, 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
Mill Brothers Hills, MD

Average wind speed in December - Mill Brothers Hills, MD
  • Average wind speed in December: 7.7mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).

Average humidity in December
Mill Brothers Hills, MD

Average humidity in December - Mill Brothers Hills, MD
  • Average humidity in December: 79%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (75%).

Average rainfall in December
Mill Brothers Hills, MD

Average rainfall in December - Mill Brothers Hills, MD
  • Average rainfall in December: 1.77"

The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is February (1.61").

Average rainfall days in December
Mill Brothers Hills, MD

Average rainfall days in December - Mill Brothers Hills, MD
  • Average rainfall days in December: 9.8 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (7.6 days).

Average snowfall in December
Mill Brothers Hills, MD

Average snowfall in December - Mill Brothers Hills, MD
  • Average snowfall in December: 1.57"

The month with the highest snowfall is March (3.03").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Mill Brothers Hills, MD

Average snowfall days in December - Mill Brothers Hills, MD
  • Average snowfall days in December: 3.9 days

The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Mill Brothers Hills, MD

Average daylight in December / Average sunshine in December - Mill Brothers Hills, MD
  • Average daylight in December: 9h and 2min

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 24min).

  • Average sunshine in December: 5h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Mill Brothers Hills, MD

Average sunshine days in December - Mill Brothers Hills, MD
  • Average sunshine days in December: 18.1 days

The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (10.8 days).

Average UV index in December
Mill Brothers Hills, MD

Average UV index in December - Mill Brothers Hills, 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, November and December (UV index 2).

Average cloud cover in December
Mill Brothers Hills, MD

Average cloud cover in December - Mill Brothers Hills, MD
  • Average cloud cover in December: 47

The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Mill Brothers Hills, MD

Average visibility in December - Mill Brothers Hills, MD
  • Average visibility in December: 6mi

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

Mill Brothers Hills, Maryland, USA

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