December weather forecastRupert, WV
December
Weather in December
The first month of the winter, December, is also a wintry month in Rupert, West Virginia, with an average temperature varying between 28.4°F (-2°C) and 40.5°F (4.7°C).Temperature
A moderate decline in average high-temperatures is noted in December, moving from a chilly 48.9°F (9.4°C) in November to an icy 40.5°F (4.7°C). The mean low-temperature during December nights in Rupert is a subzero cold 28.4°F (-2°C).Humidity
In Rupert, the average relative humidity in December is 83%.Rainfall
In Rupert, during December, the rain falls for 11.9 days and regularly aggregates up to 3.31" (84mm) of precipitation. Throughout the year, there are 181.7 rainfall days, and 35.31" (897mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 9.7 days. Throughout December, 6.93" (176mm) of snow is accumulated. In Rupert, during the entire year, snow falls for 50.2 days and aggregates up to 32.83" (834mm) 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 December, sunrise is at 7:20 am and sunset at 5:03 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:13 pm EST.
Sunshine
In December, the average sunshine is 4.3h.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 of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rupert, WV
- Average high temperature in December: 40.5°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Rupert, 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
Rupert, WV
- Average wind speed in December: 6.9mph
The windiest months (with the highest average wind speed) are January and February (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in December
Rupert, WV
- Average humidity in December: 83%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are June, July and November (79%).
Average rainfall in December
Rupert, WV
- Average rainfall in December: 3.31"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Rupert, WV
- Average rainfall days in December: 11.9 days
The month with the highest number of rainy days is May (21.9 days).
The month with the least rainy days is February (9.1 days).
Average snowfall in December
Rupert, WV
- Average snowfall in December: 6.93"
The month with the highest snowfall is February (7.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rupert, WV
- Average snowfall days in December: 9.7 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rupert, WV
- Average daylight in December: 9h and 36min
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 18min
The months with the most sunshine are June and July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Rupert, WV
- Average sunshine days in December: 12.3 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (7.4 days).
Average UV index in December
Rupert, 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
Rupert, WV
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are June and August (Cloud cover 41).
Average visibility in December
Rupert, WV
- Average visibility in December: 4mi
The months with the highest visibility are March, April, June, July and November (5mi).
The months with the lowest visibility are January, February, May, August, September, October and December (4mi).
