December weather forecastCharleston, TN
December
Weather in December
December, the first month of the winter in Charleston, is also a fresh month, with temperature in the range of an average low of 36.1°F (2.3°C) and an average high of 50.5°F (10.3°C).Temperature
The arrival of December is marked by a minor reduction in average high-temperature, sliding from a refreshing 58.1°F (14.5°C) in November to a cool 50.5°F (10.3°C). In the month of December, the average temperature in Charleston dips to a cold 36.1°F (2.3°C) during the night.Humidity
With an average relative humidity of 80%, December is the most humid month.Rainfall
In Charleston, Tennessee, during December, the rain falls for 11.4 days and regularly aggregates up to 2.36" (60mm) of precipitation. Throughout the year, in Charleston, there are 148 rainfall days, and 23.9" (607mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In December, in Charleston, it is snowing for 0.7 days. Throughout December, 0.24" (6mm) of snow is accumulated. In Charleston, during the entire year, snow falls for 5.2 days and aggregates up to 1.77" (45mm) of snow.Daylight
The month with the shortest days in Charleston is December, with an average of 9h and 48min of daylight.On the first day of December, sunrise is at 7:29 am and sunset at 5:26 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 5:37 pm EST.
Sunshine
With an average of 5.1h of sunshine, December has the least sunshine of the year in Charleston, Tennessee.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Charleston, Tennessee. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Charleston, TN
- Average high temperature in December: 50.5°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (46.4°F).
- Average low temperature in December: 36.1°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).
Average pressure in December
Charleston, TN
- Average pressure in December: 30.15"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Charleston, TN
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Charleston, TN
- Average humidity in December: 80%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, July, August, September, October and November (75%).
Average rainfall in December
Charleston, TN
- Average rainfall in December: 2.36"
The wettest month (with the highest rainfall) is July (2.64").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in December
Charleston, TN
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is November (7.3 days).
Average snowfall in December
Charleston, TN
- Average snowfall in December: 0.24"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Charleston, TN
- Average snowfall days in December: 0.7 days
The month with the highest number of snowfall days is February (1.7 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
Charleston, TN
- Average daylight in December: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 5h and 6min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in December
Charleston, TN
- Average sunshine days in December: 17.7 days
The months with the most sunshine days are October and November (21.2 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in December
Charleston, TN
- 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 and December (UV index 2).
Average cloud cover in December
Charleston, TN
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in December
Charleston, TN
- Average visibility in December: 5mi
The months with the highest visibility are February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, May and December (5mi).
