December weather forecast
Bel Air, MD

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Weather in December

December marks the official onset of winter, with temperatures dropping to a chilly 32.2°F (0.1°C) at night. It brings the magic of holiday season to Bel Air, with homes adorned with lights and decorations. Snowfall occurs again and the snow-covered ground echoes the festive spirit in the air. The daylight is at its shortest during December, receding as early as 4 pm in the latter half of the month. This makes driving conditions potentially difficult, with icy roads and darker hours.

Temperature

A decrease in the average high-temperature is observed in Bel Air during December, shifting from a cool 52.9°F (11.6°C) in November to a frosty 43.9°F (6.6°C). During December, the temperature tends to dip to an average of 32.2°F (0.1°C) at night.

Humidity

In Bel Air, the average relative humidity in December is 78%.

Rainfall

In Bel Air, during December, the rain falls for 10.5 days and regularly aggregates up to 3.15" (80mm) of precipitation. Throughout the year, there are 170.1 rainfall days, and 36.42" (925mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Bel Air, Maryland, are January through May, November and December. In Bel Air, in December, during 3.8 snowfall days, 1.42" (36mm) of snow is typically accumulated. In Bel Air, during the entire year, snow falls for 21.9 days and aggregates up to 10.55" (268mm) of snow.

Daylight

December has the shortest days of the year in Bel Air, Maryland, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 7:07 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:51 pm EST.

Sunshine

The average sunshine in December is 5.1h.

UV index

The months with the lowest UV index in Bel Air are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
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Frequently asked questions

Is December cold in Bel Air?

In December, the average high-temperature and low-temperature in Bel Air, Maryland, are 43.9°F (6.6°C) and 32.2°F (0.1°C) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 87.8°F (31°C).

What is the average humidity in December in Bel Air?

In Bel Air, Maryland, the average relative humidity in December is 78%.

How many days does it rain in December in Bel Air?

In Bel Air, Maryland, in December, during 10.5 rainfall days, 3.15" (80mm) of precipitation is typically accumulated.

How many days does it snow in December in Bel Air?

In Bel Air, during December, snow falls for 3.8 days and regularly aggregates up to 1.42" (36mm) of snow.

What is the month with the shortest days in Bel Air?

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

How many hours of daylight does Bel Air have in December?

The average day length in December in Bel Air, Maryland, is 9h and 26min.

When are sunrise and sunset in December in Bel Air?

On the first day of December, sunrise is at 7:07 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:51 pm EST.

How many hours of sunshine does Bel Air have in December?

The average sunshine duration in December in Bel Air is 5.1h.

What is the month with the lowest UV index in Bel Air?

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

What is the UV index intensity in December in Bel Air?

In Bel Air, Maryland, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
52.9°F 11.6°C
43.9°F 6.6°C
37.6°F 3.1°C
Average low temperature
38.5°F 3.6°C
32.2°F 0.1°C
25.3°F -3.7°C
Average pressure
30.13" 765mmHg
30.1" 765mmHg
30.1" 765mmHg
Average wind speed
7.8mph 12.6km/h
8.2mph 13.2km/h
8.9mph 14.3km/h
Average max. wind speed
8.5mph 13.7km/h
8.9mph 14.3km/h
9.7mph 15.6km/h
Average wind speed gusts
13.3mph 21.4km/h
13.7mph 22km/h
14.6mph 23.5km/h
Average humidity
75%
78%
75%
Average rainfall
2.52" 64mm
3.15" 80mm
2.36" 60mm
Average rainfall days
10.1
10.5
9.1
Average snowfall
0.31" 8mm
1.42" 36mm
2.8" 71mm
Average snowfall days
0.5
3.8
6.8
Average daylight
10h 0min
9h 2min
9h 5min
Average sunshine
5h 5min
5h 1min
5h 0min
Average sunshine days
18.3
16.1
16.8
Average UV index
2
2
2
Average cloud cover
37%
46%
45%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in December
Bel Air, MD

Average temperature in December - Bel Air, MD
  • Average high temperature in December: 43.9°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (37.6°F).

  • Average low temperature in December: 32.2°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

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Average pressure in December
Bel Air, MD

Average pressure in December - Bel Air, MD
  • Average pressure in December: 30.1"Hg

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

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Average wind speed in December
Bel Air, MD

Average wind speed in December - Bel Air, MD
  • Average wind speed in December: 8.2mph

The windiest month (with the highest average wind speed) is March (9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in December
Bel Air, MD

Average humidity in December - Bel Air, MD
  • Average humidity in December: 78%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in December
Bel Air, MD

Average rainfall in December - Bel Air, MD
  • Average rainfall in December: 3.15"

The wettest month (with the highest rainfall) is August (4.49").
The driest month (with the least rainfall) is January (2.36").

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Average rainfall days in December
Bel Air, MD

Average rainfall days in December - Bel Air, MD
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in December
Bel Air, MD

Average snowfall in December - Bel Air, MD
  • Average snowfall in December: 1.42"

The month with the highest snowfall is March (3.62").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
Bel Air, MD

Average snowfall days in December - Bel Air, MD
  • Average snowfall days in December: 3.8 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Bel Air, MD

Average daylight in December / Average sunshine in December - Bel Air, 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 1min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in December
Bel Air, MD

Average sunshine days in December - Bel Air, MD
  • Average sunshine days in December: 16.1 days

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is May (8.8 days).

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Average UV index in December
Bel Air, MD

Average UV index in December - Bel Air, 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).

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Average cloud cover in December
Bel Air, MD

Average cloud cover in December - Bel Air, MD
  • Average cloud cover in December: 46

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in December
Bel Air, MD

Average visibility in December - Bel Air, 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).

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Bel Air, Maryland, USA

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