December weather forecast
Grantham Hall, MD

Share

Weather in December

The first month of the winter, December, is still a chilly month in Grantham Hall, Maryland, with an average temperature ranging between max 46.4°F (8°C) and min 36.5°F (2.5°C).

Temperature

As December arrives, Grantham Hall's weather displays a minor decrease in high-temperatures, transitioning from November's fresh 54.7°F (12.6°C) to a frosty 46.4°F (8°C). During December, Grantham Hall consistently records a temperature low averaging an icy 36.5°F (2.5°C).

Humidity

In December, the average relative humidity is 75%.

Rainfall

In Grantham Hall, in December, during 8.4 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Grantham Hall, during the entire year, the rain falls for 132.3 days and collects up to 15.83" (402mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Grantham Hall, Maryland, in December, snow falls for 1.6 days, with typically accumulated 0.28" (7mm) of snow. In Grantham Hall, Maryland, during the entire year, snow falls for 9.4 days and aggregates up to 1.97" (50mm) 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 December in Grantham Hall, sunrise is at 7:06 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:55 pm EST.

Sunshine

The average sunshine in December is 5.2h.

UV index

January 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 the ordinary person.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in December?

The average high-temperature and low-temperature during December are 46.4°F (8°C) and 36.5°F (2.5°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, in August is estimated at 89.6°F (32°C).

What is the average humidity in December?

In Grantham Hall, the average relative humidity in December is 75%.

How much does it rain in December?

In Grantham Hall, in December, it is raining for 8.4 days, with typically 0.91" (23mm) of accumulated precipitation.

How many days does it snow in December in Grantham Hall?

In Grantham Hall, in December, during 1.6 snowfall days, 0.28" (7mm) 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 Grantham Hall, Maryland, the average day length in December is 9h and 31min.

When is the sunrise / sunset in December?

On the first day of December in Grantham Hall, sunrise is at 7:06 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:55 pm EST.

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

In December, the average sunshine duration is 5.2h.

When is the lowest UV index?

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Grantham Hall.

How high is the UV index in December?

In Grantham Hall, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents 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
Grantham Hall, MD

Average temperature in December - Grantham Hall, MD
  • Average high temperature in December: 46.4°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 (40.6°F).

  • Average low temperature in December: 36.5°F

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

Average pressure in December
Grantham Hall, MD

Average pressure in December - Grantham Hall, MD
  • Average pressure in December: 30.11"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).

Average wind speed in December
Grantham Hall, MD

Average wind speed in December - Grantham Hall, MD
  • Average wind speed in December: 9.2mph

The windiest months (with the highest average wind speed) are January and March (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

Average humidity in December
Grantham Hall, MD

Average humidity in December - Grantham Hall, MD
  • Average humidity in December: 75%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (72%).

Average rainfall in December
Grantham Hall, MD

Average rainfall in December - Grantham Hall, MD
  • Average rainfall in December: 0.91"

The wettest month (with the highest rainfall) is August (2.4").
The driest month (with the least rainfall) is January (0.67").

Average rainfall days in December
Grantham Hall, MD

Average rainfall days in December - Grantham Hall, MD
  • Average rainfall days in December: 8.4 days

The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (6.6 days).

Average snowfall in December
Grantham Hall, MD

Average snowfall in December - Grantham Hall, MD
  • Average snowfall in December: 0.28"

The month with the highest snowfall is January (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Grantham Hall, MD

Average snowfall days in December - Grantham Hall, MD
  • Average snowfall days in December: 1.6 days

The month with the highest number of snowfall days is January (2.9 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
Grantham Hall, MD

Average daylight in December / Average sunshine in December - Grantham Hall, MD
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
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 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

Average sunshine days in December
Grantham Hall, MD

Average sunshine days in December - Grantham Hall, MD
  • Average sunshine days in December: 19.9 days

The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is August (13.7 days).

Average UV index in December
Grantham Hall, MD

Average UV index in December - Grantham Hall, 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 and December (UV index 2).

Average cloud cover in December
Grantham Hall, MD

Average cloud cover in December - Grantham Hall, MD
  • Average cloud cover in December: 43

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in December
Grantham Hall, MD

Average visibility in December - Grantham Hall, 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).

Grantham Hall, Maryland, USA

Weather forecast for your location

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