December weather forecast
Hylas, VA

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Weather in December

The first month of the winter, December, is still a chilly month in Hylas, Virginia, with an average temperature fluctuating between 49.1°F (9.5°C) and 34.9°F (1.6°C).

Temperature

December marks a gentle change in average high-temperature, declining from November's moderate 56.7°F (13.7°C) to a frosty 49.1°F (9.5°C). Throughout the December nights, Hylas encounters a low-temperature of 34.9°F (1.6°C).

Humidity

With an average relative humidity of 78%, December is the most humid month.

Rainfall

In Hylas, in December, during 10.1 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. In Hylas, during the entire year, the rain falls for 151.1 days and collects up to 26.22" (666mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Hylas, Virginia, during December, snow falls for 1.5 days and regularly aggregates up to 1.5" (38mm) of snow. Throughout the year, there are 10.5 snowfall days, and 6.42" (163mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 36min of daylight.
On the first day of December, sunrise is at 7:07 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:02 pm EST.

Sunshine

The month with the least sunshine is December, with an average of 5.2h of sunshine.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Updated: Aug 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature?

The high-temperature during December is 49.1°F (9.5°C) and the low-temperature is 34.9°F (1.6°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is calculated to be 86°F (30°C).

What is the most humid month?

The most humid month is December, with an average relative humidity of 78%.

What is the average humidity in December?

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

How many days does it rain in December?

In December, the rain falls for 10.1 days. Throughout December, 1.93" (49mm) of precipitation is accumulated.

How much does it snow in December?

In Hylas, in December, during 1.5 snowfall days, 1.5" (38mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 36min of daylight.

What is the average length of the day in December in Hylas?

In Hylas, the average day length in December is 9h and 37min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:02 pm EST.

What is the month with the least sunshine in Hylas?

With an average of 5.2h of sunshine, December has the least sunshine of the year.

How many hours of sunshine does Hylas have in December?

The average sunshine duration in December 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 minimal hazard to health 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
Hylas, VA

Average temperature in December - Hylas, VA
  • Average high temperature in December: 49.1°F

The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (44.2°F).

  • Average low temperature in December: 34.9°F

The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).

Average pressure in December
Hylas, VA

Average pressure in December - Hylas, VA
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Hylas, VA

Average wind speed in December - Hylas, VA
  • Average wind speed in December: 6mph

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
Hylas, VA

Average humidity in December - Hylas, VA
  • Average humidity in December: 78%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).

Average rainfall in December
Hylas, VA

Average rainfall in December - Hylas, VA
  • Average rainfall in December: 1.93"

The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is September (1.65").

Average rainfall days in December
Hylas, VA

Average rainfall days in December - Hylas, VA
  • Average rainfall days in December: 10.1 days

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in December
Hylas, VA

Average snowfall in December - Hylas, VA
  • Average snowfall in December: 1.5"

The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Hylas, VA

Average snowfall days in December - Hylas, VA
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (3.5 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
Hylas, VA

Average daylight in December / Average sunshine in December - Hylas, VA
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

Average sunshine days in December
Hylas, VA

Average sunshine days in December - Hylas, VA
  • Average sunshine days in December: 19.2 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.9 days).

Average UV index in December
Hylas, VA

Average UV index in December - Hylas, VA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in December
Hylas, VA

Average cloud cover in December - Hylas, VA
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Hylas, VA

Average visibility in December - Hylas, VA
  • 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).

Hylas, Virginia, USA

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