December weather forecastUnion, WV
December
Weather in December
The first month of the winter, December, is also a wintry month in Union, West Virginia, with an average temperature ranging between max 41.9°F (5.5°C) and min 28.8°F (-1.8°C).Temperature
As November makes way for December, Union's average high-temperature eases from a fresh 50.4°F (10.2°C) to a wintry 41.9°F (5.5°C). Union's nighttime temperature in December falls to an average of 28.8°F (-1.8°C).Humidity
In December, the average relative humidity in Union is 82%.Rainfall
In Union, in December, it is raining for 12.6 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, there are 183.6 rainfall days, and 31.61" (803mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Union, West Virginia, during December, snow falls for 8 days and regularly aggregates up to 3.35" (85mm) of snow. In Union, during the entire year, snow falls for 44.3 days and aggregates up to 20.67" (525mm) of snow.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:18 am and sunset at 5:04 pm. On the last day of December, sunrise is at 7:36 am and sunset at 5:14 pm EST.
Sunshine
In Union, the average sunshine in December is 4.5h.UV index
The months with the lowest UV index in Union are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Union, WV
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (36.3°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in December
Union, WV
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Union, WV
- Average wind speed in December: 6.5mph
The windiest months (with the highest average wind speed) are January and February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in December
Union, WV
- Average humidity in December: 82%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is June (78%).
Average rainfall in December
Union, WV
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Union, WV
- Average rainfall days in December: 12.6 days
The month with the highest number of rainy days is May (22.2 days).
The month with the least rainy days is November (10.2 days).
Average snowfall in December
Union, WV
- Average snowfall in December: 3.35"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Union, WV
- Average snowfall days in December: 8 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Union, WV
- Average daylight in December: 9h and 36min
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: 4h and 30min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Union, WV
- Average sunshine days in December: 12 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (7.7 days).
Average UV index in December
Union, WV
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Union, WV
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in December
Union, WV
- Average visibility in December: 5mi
The months with the highest visibility are March, April, June, July, November and December (5mi).
The months with the lowest visibility are January, February, May, August, September and October (4mi).
