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 marks a decrease in the average high-temperature, transitioning from a cool 53.1°F (11.7°C) in November to a chilly 43.9°F (6.6°C). During December, the temperature tends to dip to an average of 32.5°F (0.3°C) at night.Humidity
The average relative humidity in December is 81%.Rainfall
In Sumerco, during December, the rain falls for 11 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Sumerco, during the entire year, the rain falls for 152.9 days and collects up to 16.5" (419mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Sumerco. In Sumerco, during December, snow falls for 7.5 days and regularly aggregates up to 1.89" (48mm) of snow. Throughout the year, in Sumerco, there are 37.1 snowfall days, and 8.27" (210mm) of snow is accumulated.Daylight
The month with the shortest days in Sumerco is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:26 am and sunset at 5:07 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 5:17 pm EST.
Sunshine
In December, the average sunshine is 4.2h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Sumerco. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A daily high UV index of 2 in December leads to these guidelines:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Sumerco during December?
What is the average humidity in December in Sumerco?
How many days does it rain in December in Sumerco?
How many days does it snow in December in Sumerco?
What is the month with the shortest days in Sumerco?
What is the average length of the day in December in Sumerco?
When are sunrise and sunset in December in Sumerco?
How long on average sun shines in December in Sumerco?
When is the lowest UV index in Sumerco?
What is the UV index intensity in December in Sumerco?
Average temperature in December
Sumerco, WV
- Average high temperature in December: 43.9°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 32.5°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in December
Sumerco, 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
Sumerco, WV
- Average wind speed in December: 6.1mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in December
Sumerco, WV
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is August (75%).
Average rainfall in December
Sumerco, WV
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is September (0.83").
Average rainfall days in December
Sumerco, WV
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in December
Sumerco, WV
- Average snowfall in December: 1.89"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Sumerco, WV
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (11.2 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
Sumerco, 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: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Sumerco, WV
- Average sunshine days in December: 14.3 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in December
Sumerco, WV
- 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
Sumerco, WV
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Sumerco, WV
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Sumerco, West Virginia, USA
Weather forecast for your location
2. Allow the app to use your location