December weather forecastKetterman, WV
December
Weather in December
The first month of the winter, December, is still a cold month in Ketterman, West Virginia, with an average temperature ranging between max 41.7°F (5.4°C) and min 28°F (-2.2°C).Temperature
With the onset of December, Ketterman's average high-temperature slightly adjusts, moderately receding from November's fresh 50.5°F (10.3°C) to a cold 41.7°F (5.4°C). Throughout December, the average low-temperature records at a freezing cold 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 Ketterman, West Virginia, in December, during 14.2 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Ketterman, 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 Ketterman, during December, snow falls for 6.8 days and regularly aggregates up to 2.64" (67mm) of snow. Throughout the year, there are 37.9 snowfall days, and 15.91" (404mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:17 am and sunset at 4:55 pm. On the last day of December, sunrise is at 7:35 am and sunset at 5:05 pm EST.
Sunshine
The average sunshine in December is 5h.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 estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. It's recommended to limit sun exposure when its radiation is at its peak during midday. Stay sun-safe with clothing that is both closely woven and worn loosely. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ketterman, 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
Ketterman, 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
Ketterman, 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
Ketterman, 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
Ketterman, 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
Ketterman, 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
Ketterman, 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
Ketterman, 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
Ketterman, WV
- Average daylight in December: 9h and 30min
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
Ketterman, 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
Ketterman, 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
Ketterman, 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
Ketterman, 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).
