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 slight reduction in average high-temperature, easing from a cool 50.5°F (10.3°C) in November to an icy 41.7°F (5.4°C). Seneca Rocks, during December nights, observes an average temperature of 28°F (-2.2°C).Humidity
The months with the highest humidity are February, September, October and December, with an average relative humidity of 79%.Rainfall
In December, the rain falls for 14.2 days. Throughout December, 2.28" (58mm) of precipitation is accumulated. In Seneca Rocks, West Virginia, during the entire year, the rain falls for 176.4 days and collects up to 25.24" (641mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 6.8 days. Throughout December, 2.64" (67mm) of snow is accumulated. In Seneca Rocks, during the entire year, snow falls for 37.9 days and aggregates up to 15.91" (404mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December in Seneca Rocks, sunrise is at 7:17 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 5:05 pm EST.
Sunshine
The average sunshine in December is 5h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 2 in December suggests the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the most humid month?
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 Seneca Rocks have in December?
What time are sunrise and sunset in December in Seneca Rocks?
How many hours of sunshine does Seneca Rocks have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Seneca Rocks, WV
- Average high temperature in December: 41.7°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (36.3°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Seneca Rocks, WV
- 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 (29.96"Hg).
Average wind speed in December
Seneca Rocks, WV
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in December
Seneca Rocks, WV
- Average humidity in December: 79%
The months with the highest relative humidity are February, September, October and December (79%).
The months with the lowest relative humidity are April, June and July (75%).
Average rainfall in December
Seneca Rocks, WV
- Average rainfall in December: 2.28"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is November (1.73").
Average rainfall days in December
Seneca Rocks, WV
- Average rainfall days in December: 14.2 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (11.6 days).
Average snowfall in December
Seneca Rocks, WV
- Average snowfall in December: 2.64"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Seneca Rocks, WV
- Average snowfall days in December: 6.8 days
The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Seneca Rocks, 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: 5h and 0min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in December
Seneca Rocks, WV
- Average sunshine days in December: 12.1 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is February (9.7 days).
Average UV index in December
Seneca Rocks, WV
- Average UV index in December: 2
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Seneca Rocks, WV
- Average cloud cover in December: 47
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Seneca Rocks, WV
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The month with the lowest visibility is September (4mi).
Seneca Rocks, West Virginia, USA
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