December weather forecast
Gerber Knoll, MD

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Weather in December

The first month of the winter, December, is also a frosty month in Gerber Knoll, Maryland, with an average temperature ranging between min 31.3°F (-0.4°C) and max 43.2°F (6.2°C).

Temperature

With the commencement of December, Gerber Knoll records a moderate temperature decline, with the average high easing from November's fresh 52.2°F (11.2°C) to a chilly 43.2°F (6.2°C). Gerber Knoll reports a consistent average low-temperature of 31.3°F (-0.4°C) throughout December nights.

Humidity

In Gerber Knoll, the average relative humidity in December is 78%.

Rainfall

In Gerber Knoll, in December, during 9.1 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, there are 130.3 rainfall days, and 15.47" (393mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall in Gerber Knoll. In Gerber Knoll, during December, snow falls for 2.5 days and regularly aggregates up to 0.47" (12mm) of snow. In Gerber Knoll, during the entire year, snow falls for 16 days and aggregates up to 4.13" (105mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of December, sunrise is at 7:09 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:27 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 value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 2 in December interprets into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

In December, the average high-temperature and low-temperature in Gerber Knoll are 43.2°F (6.2°C) and 31.3°F (-0.4°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 89.6°F (32°C).

What is the average humidity in December?

In Gerber Knoll, the average relative humidity in December is 78%.

How many days does it rain in December in Gerber Knoll?

In Gerber Knoll, during December, the rain falls for 9.1 days and regularly aggregates up to 1.02" (26mm) of precipitation.

How many days does it snow in December?

In December, it is snowing for 2.5 days. Throughout December, 0.47" (12mm) of snow is accumulated.

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.

How many hours of daylight does Gerber Knoll have in December?

In Gerber Knoll, the average day length in December is 9h and 27min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:09 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:54 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 5h.

What is the month with 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 reading in December?

The average daily maximum UV index in December is 2. A UV Index 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
Gerber Knoll, MD

Average temperature in December - Gerber Knoll, MD
  • Average high temperature in December: 43.2°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: 31.3°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average pressure in December
Gerber Knoll, MD

Average pressure in December - Gerber Knoll, 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
Gerber Knoll, MD

Average wind speed in December - Gerber Knoll, MD
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
Gerber Knoll, MD

Average humidity in December - Gerber Knoll, MD
  • Average humidity in December: 78%

The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January, April, July and November (75%).

Average rainfall in December
Gerber Knoll, MD

Average rainfall in December - Gerber Knoll, MD
  • Average rainfall in December: 1.02"

The wettest month (with the highest rainfall) is August (2.48").
The driest month (with the least rainfall) is February (0.79").

Average rainfall days in December
Gerber Knoll, MD

Average rainfall days in December - Gerber Knoll, MD
  • Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is August (15.1 days).
The months with the least rainy days are January and February (6.8 days).

Average snowfall in December
Gerber Knoll, MD

Average snowfall in December - Gerber Knoll, MD
  • Average snowfall in December: 0.47"

The month with the highest snowfall is January (1.34").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Gerber Knoll, MD

Average snowfall days in December - Gerber Knoll, MD
  • Average snowfall days in December: 2.5 days

The month with the highest number of snowfall days is February (4.9 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
Gerber Knoll, MD

Average daylight in December / Average sunshine in December - Gerber Knoll, 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 0min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Gerber Knoll, MD

Average sunshine days in December - Gerber Knoll, MD
  • Average sunshine days in December: 19.3 days

The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is May (12.9 days).

Average UV index in December
Gerber Knoll, MD

Average UV index in December - Gerber Knoll, 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
Gerber Knoll, MD

Average cloud cover in December - Gerber Knoll, MD
  • Average cloud cover in December: 46

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 32).

Average visibility in December
Gerber Knoll, MD

Average visibility in December - Gerber Knoll, 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).

Gerber Knoll, Maryland, USA

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