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
The beginning of December involves a decrease in the average high-temperature, transitioning from a cool 52.3°F (11.3°C) in November to a frosty 43.2°F (6.2°C). An average low-temperature of 31.6°F (-0.2°C) is expected during December.Humidity
In Harley, the average relative humidity in December is 81%.Rainfall
In Harley, in December, during 13.6 rainfall days, 3.27" (83mm) of precipitation is typically accumulated. In Harley, West Virginia, during the entire year, the rain falls for 186.1 days and collects up to 36.3" (922mm) of precipitation.Snowfall
Months with snowfall in Harley are January through May, October through December. In Harley, in December, during 10.1 snowfall days, 3.86" (98mm) of snow is typically accumulated. In Harley, during the entire year, snow falls for 46.8 days and aggregates up to 20.04" (509mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:24 am and sunset at 5:04 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:14 pm EST.
Sunshine
In Harley, the average sunshine in December is 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 reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Harley in December?
What is the average humidity in December in Harley?
How many days does it rain in December in Harley?
How many days does it snow in December in Harley?
What is the month with the shortest days in Harley?
How many hours of daylight does Harley have in December?
What time are sunrise and sunset in December in Harley?
How many hours of sunshine does Harley have in December?
When is the lowest UV index in Harley?
How high is the UV index in December in Harley?
Average temperature in December
Harley, WV
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in December: 31.6°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Harley, 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 (29.97"Hg).
Average wind speed in December
Harley, WV
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is February (6.7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in December
Harley, WV
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are June and August (76%).
Average rainfall in December
Harley, WV
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in December
Harley, WV
- Average rainfall days in December: 13.6 days
The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is November (11.5 days).
Average snowfall in December
Harley, WV
- Average snowfall in December: 3.86"
The month with the highest snowfall is January (5.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Harley, WV
- Average snowfall days in December: 10.1 days
The month with the highest number of snowfall days is January (14 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harley, WV
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Harley, WV
- Average sunshine days in December: 10.8 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is May (7.9 days).
Average UV index in December
Harley, WV
- Average UV index in December: 2
The months with the highest UV index are 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
Harley, WV
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Harley, WV
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The month with the lowest visibility is January (4mi).
Harley, West Virginia, USA
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