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 the transition to December, Summerlee observes a minor drop in the average high-temperature, shifting from a cool 50.5°F (10.3°C) in November to a cold 42.1°F (5.6°C). An average minimum temperature of 30°F (-1.1°C) is recorded during the month of December.Humidity
In December, the average relative humidity is 82%.Rainfall
In Summerlee, during December, the rain falls for 12.3 days and regularly aggregates up to 3.43" (87mm) of precipitation. In Summerlee, during the entire year, the rain falls for 183.4 days and collects up to 36.97" (939mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Summerlee, in December, during 11.2 snowfall days, 6.89" (175mm) of snow is typically accumulated. In Summerlee, during the entire year, snow falls for 54.9 days and aggregates up to 35.28" (896mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:22 am and sunset at 5:05 pm. On the last day of December, sunrise is at 7:40 am and sunset at 5:15 pm EST.
Sunshine
In December, the average sunshine is 4.1h.UV index
January through March, November 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: The maximum UV index of 2 during December leads to these instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by 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 average humidity in December?
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?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Summerlee, WV
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 30°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Summerlee, 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 (29.98"Hg).
Average wind speed in December
Summerlee, WV
- Average wind speed in December: 6.8mph
The windiest months (with the highest average wind speed) are January and February (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Summerlee, WV
- Average humidity in December: 82%
The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are June, July, August and November (78%).
Average rainfall in December
Summerlee, WV
- Average rainfall in December: 3.43"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Summerlee, WV
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is May (21.8 days).
The months with the least rainy days are February and November (10.5 days).
Average snowfall in December
Summerlee, WV
- Average snowfall in December: 6.89"
The month with the highest snowfall is February (7.48").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Summerlee, WV
- Average snowfall days in December: 11.2 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
Summerlee, WV
- Average daylight in December: 9h and 4min
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 36min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Summerlee, WV
- Average sunshine days in December: 11.3 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is May (7.8 days).
Average UV index in December
Summerlee, WV
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Summerlee, WV
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in December
Summerlee, WV
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Summerlee, West Virginia, USA
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