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 shift from November to December corresponds with a decrease in the average high-temperature, down to an icy 40.3°F (4.6°C) from a chilly 49.6°F (9.8°C). An average minimum temperature of 28°F (-2.2°C) is recorded during the month of December.Humidity
February and December, with an average relative humidity of 80%, are the most humid months.Rainfall
In December, the rain falls for 11.5 days. Throughout December, 2.48" (63mm) of precipitation is accumulated. In Keyser, during the entire year, the rain falls for 166 days and collects up to 27.44" (697mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Keyser, in December, snow falls for 6.6 days, with typically accumulated 2.56" (65mm) of snow. Throughout the year, there are 34.6 snowfall days, and 16.97" (431mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:17 am and sunset at 4:52 pm. On the last day of December, sunrise is at 7:35 am and sunset at 5:02 pm EST.
Sunshine
In Keyser, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during December?
What is the most humid month?
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?
How many hours of daylight does Keyser have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Keyser have in December?
When is the lowest UV index?
What is the UV index intensity in December in Keyser?
Average temperature in December
Keyser, WV
- Average high temperature in December: 40.3°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Keyser, WV
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Keyser, WV
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are January and February (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Keyser, WV
- Average humidity in December: 80%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are April, June and July (75%).
Average rainfall in December
Keyser, WV
- Average rainfall in December: 2.48"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is November (1.69").
Average rainfall days in December
Keyser, WV
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in December
Keyser, WV
- Average snowfall in December: 2.56"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Keyser, WV
- Average snowfall days in December: 6.6 days
The month with the highest number of snowfall days is January (10.3 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
Keyser, WV
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Keyser, WV
- Average sunshine days in December: 14.6 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in December
Keyser, 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
Keyser, WV
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Keyser, 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).
Keyser, West Virginia, USA
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