Charleston
West Virginia, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Charleston, West VA

The first month of the winter, December, is also a frosty month in Charleston, West Virginia, with average temperature ranging between max 43.7°F (6.5°C) and min 32.4°F (0.2°C).

Temperature

In Charleston, the average high-temperature in December decreases, from a cool 52.7°F (11.5°C) in November, to a chilly 43.7°F (6.5°C). The average low-temperature, in Charleston, West Virginia, is 32.4°F (0.2°C).

Humidity

In December, the average relative humidity in Charleston is 81%.

Rainfall

In December, the rain falls for 13.4 days. Throughout December, 3.11" (79mm) of precipitation is accumulated. Throughout the year, in Charleston, there are 180.4 rainfall days, and 34.06" (865mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Charleston. In Charleston, during December, snow falls for 9.2 days and regularly aggregates up to 4.53" (115mm) of snow. In Charleston, during the entire year, snow falls for 46.8 days, and aggregates up to 22.01" (559mm) of snow.

Daylight

With an average of 9.5h of daylight, December has the shortest days of the year.

Sunshine

In Charleston, the average sunshine is 4.1h.

UV index

January, February 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 the exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Charleston?

In December, the average high-temperature is 43.7°F (6.5°C), and the average low-temperature is 32.4°F (0.2°C).

What is the average humidity in December in Charleston?

In Charleston, the average relative humidity in December is 81%.

How much does it rain in Charleston in December?

In December, the rain falls for 13.4 days. Throughout December, 3.11" (79mm) of precipitation is accumulated.

How many days does it snow in December in Charleston?

In Charleston, during December, snow falls for 9.2 days and regularly aggregates up to 4.53" (115mm) of snow.

What is the month with the shortest days in Charleston?

With an average of 9.5h of daylight, December has the shortest days of the year in Charleston.

How many hours of daylight does Charleston have in December?

In December, the average length of the day is 9.5h.

How long on average sun shines in December in Charleston?

In December, the average sunshine in Charleston is 4.1h.

What are the months with the lowest UV index in Charleston?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Charleston, West Virginia.

What is the UV index intensity in December in Charleston?

The average daily maximum UV index in December in Charleston, West Virginia, is 2. A UV Index reading of 2, and below, represents a low health threat from the exposure to the Sun's UV rays.
Average temperature in December - Charleston, West VA
  • Average high temperature in December: 6.5°C

The warmest month (with the highest average high temperature) is July (29.8°C).
The month with the lowest average high temperature is January (3.7°C).

  • Average low temperature in December: 0.2°C

The month with the highest average low temperature is July (17.4°C).
The coldest month (with the lowest average low temperature) is January (-3.7°C).

Average humidity in December - Charleston, West VA
  • Average humidity in December: 81%

Months with the highest relative humidity are January and February (82%).
Months with the lowest relative humidity are June, July, August and November (76%).

Average rainfall in December - Charleston, West VA
  • Average rainfall in December: 79mm

The wettest month (with the highest rainfall) is May (100mm).
The driest month (with the least rainfall) is September (46mm).

Average rainfall days in December - Charleston, West VA
  • Average rainfall days in December: 13.4 days

The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (11 days).

Average snowfall in December - Charleston, West VA
  • Average snowfall in December: 115mm

The month with the highest snowfall is January (140mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Charleston, West VA
  • Average snowfall days in December: 9.2 days

The month with the highest number of snowfall days is January (14.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Charleston, West VA
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 4.1h

The month with the most sunshine is August (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 3.7h).

Average UV index in December - Charleston, West VA
  • Average UV index in December: 2

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February and December (UV index 2).