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
December is characterized by a mild reduction in the average high-temperature, from a cool 52°F (11.1°C) in November to a frosty 43.5°F (6.4°C). Throughout the month of December, the average temperature dips to a freezing cold 30.7°F (-0.7°C) at night.Humidity
The average relative humidity in December in Herndon Heights, West Virginia, is 81%.Rainfall
In Herndon Heights, West Virginia, in December, during 12.4 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. In Herndon Heights, during the entire year, the rain falls for 180.7 days and collects up to 32.24" (819mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Herndon Heights, during December, snow falls for 10.5 days and regularly aggregates up to 5.55" (141mm) of snow. In Herndon Heights, during the entire year, snow falls for 50.3 days and aggregates up to 27.09" (688mm) of snow.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year in Herndon Heights.On the first day of the month, sunrise is at 7:21 am and sunset at 5:07 pm. On the last day of December, in Herndon Heights, sunrise is at 7:39 am and sunset at 5:17 pm EST.
Sunshine
In December, the average sunshine is 4.6h.UV index
The months with the lowest UV index are January, February, 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 unsafe exposure to UV radiation for ordinary individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
How cold does it get in Herndon Heights in December?
What is the average humidity in December in Herndon Heights?
How many days does it rain in December in Herndon Heights?
How much does it snow in Herndon Heights in December?
What is the month with the shortest days in Herndon Heights?
How many hours of daylight does Herndon Heights have in December?
When is the sunrise / sunset in December in Herndon Heights?
How many hours of sunshine does Herndon Heights have in December?
When is the lowest UV index in Herndon Heights?
How high is the UV index in December in Herndon Heights?
Average temperature in December
Herndon Heights, WV
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in December
Herndon Heights, 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 (29.99"Hg).
Average wind speed in December
Herndon Heights, WV
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in December
Herndon Heights, WV
- Average humidity in December: 81%
The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are June, July, August and November (77%).
Average rainfall in December
Herndon Heights, WV
- Average rainfall in December: 3.15"
The wettest months (with the highest rainfall) are February and May (3.43").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
Herndon Heights, WV
- Average rainfall days in December: 12.4 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (11.3 days).
Average snowfall in December
Herndon Heights, WV
- Average snowfall in December: 5.55"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Herndon Heights, WV
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Herndon Heights, WV
- 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 36min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Herndon Heights, WV
- Average sunshine days in December: 11.7 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in December
Herndon Heights, WV
- Average UV index in December: 2
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Herndon Heights, WV
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in December
Herndon Heights, WV
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Herndon Heights, West Virginia, USA
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