December weather forecast
Helen, MD

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Weather in December

The first month of the winter, December, is also a frosty month in Helen, Maryland, with temperature in the range of an average low of 36.5°F (2.5°C) and an average high of 46.6°F (8.1°C).

Temperature

December is characterized by a mild reduction in the average high-temperature, from a fresh 54.9°F (12.7°C) in November to a frosty 46.6°F (8.1°C). December nights experience a consistent temperature drop to a wintry 36.5°F (2.5°C).

Humidity

In December, the average relative humidity is 76%.

Rainfall

In Helen, in December, it is raining for 10.6 days, with typically 2.13" (54mm) of accumulated precipitation. In Helen, during the entire year, the rain falls for 158.1 days and collects up to 33.07" (840mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Helen, in December, snow falls for 1.7 days, with typically accumulated 0.71" (18mm) of snow. In Helen, during the entire year, snow falls for 10.6 days and aggregates up to 5.51" (140mm) 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 7:05 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:56 pm EST.

Sunshine

In December, the average sunshine in Helen is 5.1h.

UV index

The months with the lowest UV index are January 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 the average person.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Updated: Jun 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Helen in December?

The average high-temperature and low-temperature during December are 46.6°F (8.1°C) and 36.5°F (2.5°C) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 91.4°F (33°C).

What is the average humidity in December?

In December, the average relative humidity is 76%.

How much does it rain in December?

In Helen, in December, it is raining for 10.6 days, with typically 2.13" (54mm) of accumulated precipitation.

How much does it snow in December?

In Helen, in December, snow falls for 1.7 days, with typically accumulated 0.71" (18mm) of snow.

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?

The average day length in December is 9h and 32min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:56 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 5.1h.

What is the month with the lowest UV index?

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

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 minimal hazard to health from exposure to the Sun's 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
Helen, MD

Average temperature in December - Helen, MD
  • Average high temperature in December: 46.6°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in December: 36.5°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (30°F).

Average pressure in December
Helen, MD

Average pressure in December - Helen, 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 (29.95"Hg).

Average wind speed in December
Helen, MD

Average wind speed in December - Helen, MD
  • Average wind speed in December: 8.3mph

The windiest month (with the highest average wind speed) is March (9.2mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).

Average humidity in December
Helen, MD

Average humidity in December - Helen, MD
  • Average humidity in December: 76%

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

Average rainfall in December
Helen, MD

Average rainfall in December - Helen, MD
  • Average rainfall in December: 2.13"

The wettest month (with the highest rainfall) is July (4.41").
The driest month (with the least rainfall) is January (1.81").

Average rainfall days in December
Helen, MD

Average rainfall days in December - Helen, MD
  • Average rainfall days in December: 10.6 days

The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is November (8 days).

Average snowfall in December
Helen, MD

Average snowfall in December - Helen, MD
  • Average snowfall in December: 0.71"

The month with the highest snowfall is January (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Helen, MD

Average snowfall days in December - Helen, MD
  • Average snowfall days in December: 1.7 days

The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Helen, MD

Average daylight in December / Average sunshine in December - Helen, 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 42min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in December
Helen, MD

Average sunshine days in December - Helen, MD
  • Average sunshine days in December: 18.2 days

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (11.3 days).

Average UV index in December
Helen, MD

Average UV index in December - Helen, 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
Helen, MD

Average cloud cover in December - Helen, MD
  • Average cloud cover in December: 44

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
Helen, MD

Average visibility in December - Helen, 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).

Helen, Maryland, USA

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