December weather forecastMountain City, TN
December
Weather in December
December, the first month of the winter in Mountain City, is still a chilly month, with an average temperature ranging between min 30.6°F (-0.8°C) and max 44.4°F (6.9°C).Temperature
In December, the meteorological conditions change slightly, with the average high-temperature moving from a cool 52°F (11.1°C) in November to a frosty 44.4°F (6.9°C). Mountain City's nighttime temperature in December drops to an average of 30.6°F (-0.8°C).Humidity
February, March and December, with an average relative humidity of 80%, are the most humid months in Mountain City, Tennessee.Rainfall
In Mountain City, during December, the rain falls for 11.2 days and regularly aggregates up to 3.03" (77mm) of precipitation. In Mountain City, during the entire year, the rain falls for 176.9 days and collects up to 31.61" (803mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Mountain City, Tennessee. The month with the most snowfall is December, when snow falls for 7 days and typically aggregates up to 6.5" (165mm) of snow.Daylight
The month with the shortest days in Mountain City is December, with an average of 9h and 42min of daylight.On the first day of the month, sunrise is at 7:21 am and sunset at 5:11 pm. On the last day of December, sunrise is at 7:38 am and sunset at 5:22 pm EST.
Sunshine
In Mountain City, the average sunshine in December is 5.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mountain City. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 2 during December leads to these advisories:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. 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
Mountain City, TN
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Mountain City, TN
- 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 (29.99"Hg).
Average wind speed in December
Mountain City, TN
- Average wind speed in December: 6.9mph
The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in December
Mountain City, TN
- Average humidity in December: 80%
The months with the highest relative humidity are February, March and December (80%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Mountain City, TN
- Average rainfall in December: 3.03"
The wettest month (with the highest rainfall) is February (3.31").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
Mountain City, TN
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is July (19.2 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in December
Mountain City, TN
- Average snowfall in December: 6.5"
The month with the highest snowfall is December (6.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mountain City, TN
- Average snowfall days in December: 7 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mountain City, TN
- Average daylight in December: 9h and 42min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Mountain City, TN
- Average sunshine days in December: 13.9 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is February (8.9 days).
Average UV index in December
Mountain City, TN
- 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, November and December (UV index 2).
Average cloud cover in December
Mountain City, TN
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are June, July and August (Cloud cover 37).
Average visibility in December
Mountain City, TN
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
