December weather forecastGlen Allen, VA
December
Weather in December
The first month of the winter, December, is still a chilly month in Glen Allen, Virginia, with temperature in the range of an average low of 34.7°F (1.5°C) and an average high of 48.7°F (9.3°C).Temperature
The transition into December is accompanied by a slight temperature decrease, with the average high-temperature shifting from a mild 56.5°F (13.6°C) in November to a frosty 48.7°F (9.3°C). Glen Allen's average low-temperature in the month of December is recorded at a cold 34.7°F (1.5°C).Humidity
December is the most humid month, with an average relative humidity of 78%.Rainfall
In Glen Allen, in December, during 10.5 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Glen Allen, during the entire year, the rain falls for 152.8 days and collects up to 27.09" (688mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Glen Allen, Virginia, in December, snow falls for 1.6 days, with typically accumulated 1.38" (35mm) of snow. In Glen Allen, Virginia, during the entire year, snow falls for 11.7 days and aggregates up to 7.01" (178mm) of snow.Daylight
The month with the shortest days in Glen Allen, Virginia, is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:06 am and sunset at 4:51 pm. On the last day of December, in Glen Allen, sunrise is at 7:24 am and sunset at 5:01 pm EST.
Sunshine
With an average of 5.2h of sunshine, December has the least sunshine of the year.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the UV index of 2 transforms into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. On your guard! Snow's reflection 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
Glen Allen, VA
- Average high temperature in December: 48.7°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (43.9°F).
- Average low temperature in December: 34.7°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (28.9°F).
Average pressure in December
Glen Allen, 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
Glen Allen, VA
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Glen Allen, 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 (69%).
Average rainfall in December
Glen Allen, VA
- Average rainfall in December: 2.01"
The wettest month (with the highest rainfall) is August (2.83").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in December
Glen Allen, VA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is November (9.2 days).
Average snowfall in December
Glen Allen, VA
- Average snowfall in December: 1.38"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Glen Allen, VA
- Average snowfall days in December: 1.6 days
The months with the highest number of snowfall days are January and February (3.8 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
Glen Allen, VA
- 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: 5h and 12min
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
Glen Allen, VA
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in December
Glen Allen, VA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Glen Allen, VA
- 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 32).
Average visibility in December
Glen Allen, VA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are May and December (5mi).
