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
In Jamestown, the average high-temperature in December slightly decreases from a cool 55°F (12.8°C) in November to a frosty 46.9°F (8.3°C). Throughout the month of December, the average temperature dips to an icy 34°F (1.1°C) at night.Humidity
February and December, with an average relative humidity of 80%, are the most humid months.Rainfall
In Jamestown, in December, it is raining for 13.5 days, with typically 3.74" (95mm) of accumulated precipitation. Throughout the year, there are 178.7 rainfall days, and 40.87" (1038mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Jamestown, during December, snow falls for 5.5 days and regularly aggregates up to 1.69" (43mm) of snow. Throughout the year, there are 27.6 snowfall days, and 10.59" (269mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of December in Jamestown, sunrise is at 6:35 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 4:33 pm CST.
Sunshine
In December, the average sunshine is 4.4h.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 minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 2 during December translates into the following directions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What are the most humid months?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Jamestown have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Jamestown have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Jamestown, KY
- Average high temperature in December: 46.9°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in December: 34°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure in December
Jamestown, KY
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Jamestown, KY
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is February (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Jamestown, KY
- Average humidity in December: 80%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are April, June, August, September, October and November (76%).
Average rainfall in December
Jamestown, KY
- Average rainfall in December: 3.74"
The wettest month (with the highest rainfall) is February (4.25").
The driest month (with the least rainfall) is September (2.4").
Average rainfall days in December
Jamestown, KY
- Average rainfall days in December: 13.5 days
The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is November (11.8 days).
Average snowfall in December
Jamestown, KY
- Average snowfall in December: 1.69"
The months with the highest snowfall are January and February (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Jamestown, KY
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Jamestown, KY
- 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: 4h and 2min
The months with the most sunshine are June and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in December
Jamestown, KY
- Average sunshine days in December: 12.9 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in December
Jamestown, KY
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Jamestown, KY
- Average cloud cover in December: 54
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Jamestown, KY
- Average visibility in December: 5mi
The months with the highest visibility are April, June, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September and December (5mi).
Jamestown, Kentucky, USA
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