Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December is characterized by a slight reduction in average high-temperature, easing from a mild 57.4°F (14.1°C) in November to a fresh 50.2°F (10.1°C). In December, the average low-temperature records at an icy 38.3°F (3.5°C) during the nights.Humidity
With an average relative humidity of 78%, December is the most humid month.Rainfall
In Gwynn, in December, it is raining for 12.2 days, with typically 2.6" (66mm) of accumulated precipitation. In Gwynn, during the entire year, the rain falls for 165.3 days and collects up to 34.25" (870mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Gwynn, in December, during 1.1 snowfall days, 0.51" (13mm) of snow is typically accumulated. In Gwynn, during the entire year, snow falls for 8.3 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 36min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:57 pm EST.
Sunshine
In Gwynn, the average sunshine in December is 5.4h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Gwynn, VA
- Average high temperature in December: 50.2°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in December: 38.3°F
The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).
Average pressure in December
Gwynn, VA
- Average pressure in December: 30.12"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
Gwynn, VA
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in December
Gwynn, 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 (72%).
Average rainfall in December
Gwynn, VA
- Average rainfall in December: 2.6"
The wettest month (with the highest rainfall) is August (3.62").
The driest month (with the least rainfall) is September (2.4").
Average rainfall days in December
Gwynn, VA
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is November (9.6 days).
Average snowfall in December
Gwynn, VA
- Average snowfall in December: 0.51"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Gwynn, VA
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is January (3 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
Gwynn, 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 2min
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 12min).
Average sunshine days in December
Gwynn, VA
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in December
Gwynn, VA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Gwynn, VA
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Gwynn, VA
- 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).
Gwynn, Virginia, USA
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