December weather forecast
Harness Woods, MD

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Weather in December

The first month of the winter, December, is still a chilly month in Harness Woods, Maryland, with an average temperature varying between 36.5°F (2.5°C) and 46°F (7.8°C).

Temperature

As December commences, the average high-temperature subtly reduces, transitioning from a fresh 54.5°F (12.5°C) in November to a frosty 46°F (7.8°C). Harness Woods reports an average nighttime low-temperature of 36.5°F (2.5°C) in December.

Humidity

In Harness Woods, the average relative humidity in December is 75%.

Rainfall

In Harness Woods, in December, during 7.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. In Harness Woods, during the entire year, the rain falls for 120.4 days and collects up to 10.47" (266mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Harness Woods, in December, snow falls for 1.5 days, with typically accumulated 0.12" (3mm) of snow. Throughout the year, in Harness Woods, there are 8.3 snowfall days, and 1.22" (31mm) of snow is accumulated.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:06 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:54 pm EST.

Sunshine

The average sunshine in December is 5.2h.

UV index

January, February 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 low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 2 in December translates into these instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. To guard against the harmful effects of the Sun, minimize exposure during midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Updated: Jul 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Harness Woods in December?

During December, Harness Woods experiences an average high-temperature of 46°F (7.8°C) and a low-temperature of 36.5°F (2.5°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 89.6°F (32°C).

What is the average humidity in December?

In Harness Woods, the average relative humidity in December is 75%.

How many days does it rain in December?

In Harness Woods, in December, during 7.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

How much does it snow in December?

In December, in Harness Woods, it is snowing for 1.5 days. Throughout December, 0.12" (3mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 30min of daylight.

How many hours of daylight does Harness Woods have in December?

In Harness Woods, the average day length in December is 9h and 29min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:06 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:54 pm EST.

How many hours of sunshine does Harness Woods have in December?

In December, the average sunshine duration is 5.2h.

What is the month with the lowest UV index?

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

How high is the UV index 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 unprotected exposure to UV radiation.
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
Harness Woods, MD

Average temperature in December - Harness Woods, MD
  • Average high temperature in December: 46°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 (40.3°F).

  • Average low temperature in December: 36.5°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

Average pressure in December
Harness Woods, MD

Average pressure in December - Harness Woods, 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
Harness Woods, MD

Average wind speed in December - Harness Woods, MD
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

Average humidity in December
Harness Woods, MD

Average humidity in December - Harness Woods, MD
  • Average humidity in December: 75%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).

Average rainfall in December
Harness Woods, MD

Average rainfall in December - Harness Woods, MD
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is January (0.47").

Average rainfall days in December
Harness Woods, MD

Average rainfall days in December - Harness Woods, MD
  • Average rainfall days in December: 7.4 days

The months with the highest number of rainy days are July and August (14.3 days).
The month with the least rainy days is November (5.3 days).

Average snowfall in December
Harness Woods, MD

Average snowfall in December - Harness Woods, MD
  • Average snowfall in December: 0.12"

The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Harness Woods, MD

Average snowfall days in December - Harness Woods, MD
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (2.5 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
Harness Woods, MD

Average daylight in December / Average sunshine in December - Harness Woods, 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 month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in December
Harness Woods, MD

Average sunshine days in December - Harness Woods, MD
  • Average sunshine days in December: 21.5 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is August (13.8 days).

Average UV index in December
Harness Woods, MD

Average UV index in December - Harness Woods, 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 and December (UV index 2).

Average cloud cover in December
Harness Woods, MD

Average cloud cover in December - Harness Woods, MD
  • Average cloud cover in December: 44

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December
Harness Woods, MD

Average visibility in December - Harness Woods, 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).

Harness Woods, Maryland, USA

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