December weather forecast
Montgomery Knolls, MD

Share

Weather in December

December, the first month of the winter in Montgomery Knolls, is still a chilly month, with an average temperature ranging between min 32.9°F (0.5°C) and max 44.2°F (6.8°C).

Temperature

Montgomery Knolls's progression into December involves a minor drop in the average high-temperature, slightly receding from a fresh 53.1°F (11.7°C) in November to a frosty 44.2°F (6.8°C). Nighttime temperature experiences an average drop to a wintry 32.9°F (0.5°C) in December.

Humidity

The average relative humidity in December is 76%.

Rainfall

In Montgomery Knolls, in December, during 10.2 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Montgomery Knolls, during the entire year, the rain falls for 159.3 days and collects up to 30.31" (770mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In December, it is snowing for 2.9 days. Throughout December, 1.14" (29mm) of snow is accumulated. In Montgomery Knolls, during the entire year, snow falls for 15.9 days and aggregates up to 8.7" (221mm) 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 the month, sunrise is at 7:08 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:54 pm EST.

Sunshine

In Montgomery Knolls, the average sunshine in December 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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.

Frequently asked questions

How cold is it in Montgomery Knolls in December?

The high-temperature, in December, in Montgomery Knolls, is 44.2°F (6.8°C), while the low-temperature averages to 32.9°F (0.5°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in August is calculated to be 91.4°F (33°C).

What is the average humidity in December?

In Montgomery Knolls, the average relative humidity in December is 76%.

How much does it rain in December?

In Montgomery Knolls, in December, it is raining for 10.2 days, with typically 2.24" (57mm) of accumulated precipitation.

How much does it snow in December?

In Montgomery Knolls, in December, during 2.9 snowfall days, 1.14" (29mm) of snow is typically accumulated.

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 Montgomery Knolls, the average day length in December is 9h and 28min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:54 pm EST.

How many hours of sunshine does Montgomery Knolls have in December?

In Montgomery Knolls, the average sunshine duration in December is 5.2h.

When is the lowest UV index?

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

What is the UV index intensity in December?

In Montgomery Knolls, 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.
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
Montgomery Knolls, MD

Average temperature in December - Montgomery Knolls, MD
  • Average high temperature in December: 44.2°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (38.1°F).

  • Average low temperature in December: 32.9°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 (26.1°F).

Average pressure in December
Montgomery Knolls, MD

Average pressure in December - Montgomery Knolls, 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
Montgomery Knolls, MD

Average wind speed in December - Montgomery Knolls, MD
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in December
Montgomery Knolls, MD

Average humidity in December - Montgomery Knolls, MD
  • Average humidity in December: 76%

The months with the highest relative humidity are May and October (77%).
The months with the lowest relative humidity are April and July (72%).

Average rainfall in December
Montgomery Knolls, MD

Average rainfall in December - Montgomery Knolls, MD
  • Average rainfall in December: 2.24"

The wettest month (with the highest rainfall) is August (4.06").
The driest month (with the least rainfall) is January (1.85").

Average rainfall days in December
Montgomery Knolls, MD

Average rainfall days in December - Montgomery Knolls, MD
  • Average rainfall days in December: 10.2 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (8.4 days).

Average snowfall in December
Montgomery Knolls, MD

Average snowfall in December - Montgomery Knolls, MD
  • Average snowfall in December: 1.14"

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

Average snowfall days in December
Montgomery Knolls, MD

Average snowfall days in December - Montgomery Knolls, MD
  • Average snowfall days in December: 2.9 days

The month with the highest number of snowfall days is February (4.6 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
Montgomery Knolls, MD

Average daylight in December / Average sunshine in December - Montgomery Knolls, 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 48min).
The months with the least sunshine are January and February (Average sunshine: 5h and 6min).

Average sunshine days in December
Montgomery Knolls, MD

Average sunshine days in December - Montgomery Knolls, MD
  • Average sunshine days in December: 17.9 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (11 days).

Average UV index in December
Montgomery Knolls, MD

Average UV index in December - Montgomery Knolls, 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
Montgomery Knolls, MD

Average cloud cover in December - Montgomery Knolls, MD
  • Average cloud cover in December: 45

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in December
Montgomery Knolls, MD

Average visibility in December - Montgomery Knolls, 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).

Montgomery Knolls, Maryland, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location