December weather forecastRock Creek, WV
December
Weather in December
December, the first month of the winter in Rock Creek, is also a frosty month, with temperature in the range of an average high of 43.5°F (6.4°C) and an average low of 31.1°F (-0.5°C).Temperature
December brings a slight decrease in temperature, down from a fresh 51.8°F (11°C) in November to a frosty 43.5°F (6.4°C). During December, an average low-temperature of 31.1°F (-0.5°C) is observed.Humidity
The average relative humidity in December is 81%.Rainfall
In Rock Creek, in December, during 9.5 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 135.9 rainfall days, and 16.46" (418mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Rock Creek, in December, during 5.4 snowfall days, 2.05" (52mm) of snow is typically accumulated. Throughout the year, there are 30.3 snowfall days, and 8.66" (220mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:23 am and sunset at 5:06 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:16 pm EST.
Sunshine
The average sunshine in December is 4.5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. 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
Average temperature in December
Rock Creek, WV
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in December: 31.1°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 (24.4°F).
Average pressure in December
Rock Creek, 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
Rock Creek, WV
- Average wind speed in December: 6.4mph
The windiest months (with the highest average wind speed) are January and February (7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in December
Rock Creek, WV
- Average humidity in December: 81%
The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are April, June, July, August and November (77%).
Average rainfall in December
Rock Creek, WV
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is September (0.71").
Average rainfall days in December
Rock Creek, WV
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is November (7.8 days).
Average snowfall in December
Rock Creek, WV
- Average snowfall in December: 2.05"
The month with the highest snowfall is March (2.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rock Creek, WV
- Average snowfall days in December: 5.4 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rock Creek, WV
- Average daylight in December: 9h and 36min
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 30min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Rock Creek, WV
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in December
Rock Creek, 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, November and December (UV index 2).
Average cloud cover in December
Rock Creek, 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 35).
Average visibility in December
Rock Creek, 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).
