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
With December's onset, the weather reveals a slight temperature decrease, transitioning from a moderate 57.6°F (14.2°C) in November to a fresh 50.5°F (10.3°C). December nights are marked by an average temperature drop to an icy 37.6°F (3.1°C).Humidity
December is the most humid month, with an average relative humidity of 78%.Rainfall
October and December are months with the least rain when the rain falls for 10.9 days and typically aggregates up to 1.38" (35mm) of rain.Snowfall
January through March, November and December are months with snowfall. In December, it is snowing for 0.9 days. Throughout December, 0.28" (7mm) of snow is accumulated. In Jamestown, during the entire year, snow falls for 8.3 days and aggregates up to 2.52" (64mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 42min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:20 am and sunset at 5:00 pm EST.
Sunshine
In December, the average sunshine is 5.5h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Jamestown in December?
What is the most humid month?
What is the average humidity in December?
What is the driest month?
How many days does it rain in December?
How many days 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 in Jamestown?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Jamestown, VA
- Average high temperature in December: 50.5°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in December: 37.6°F
The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in December
Jamestown, 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
Jamestown, VA
- Average wind speed in December: 6.9mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Jamestown, 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 (73%).
Average rainfall in December
Jamestown, VA
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is August (2.36").
The driest months (with the least rainfall) are October and December (1.38").
Average rainfall days in December
Jamestown, VA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is August (16.3 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in December
Jamestown, VA
- Average snowfall in December: 0.28"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Jamestown, VA
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is January (3.1 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Jamestown, 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 42min).
- Average sunshine in December: 5h and 3min
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 18min).
Average sunshine days in December
Jamestown, VA
- Average sunshine days in December: 18.2 days
The months with the most sunshine days are October and November (19.7 days).
The month with the least sunshine days is August (12.2 days).
Average UV index in December
Jamestown, 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 and December (UV index 2).
Average cloud cover in December
Jamestown, 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
Jamestown, 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).
Jamestown, Virginia, USA
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