December weather forecastGreenbrier, TN
December
Weather in December
December, the first month of the winter in Greenbrier, is also a frosty month, with an average temperature fluctuating between 47.5°F (8.6°C) and 34.9°F (1.6°C).Temperature
Greenbrier records a mild change in average high-temperature during December, easing from a moderate 56.1°F (13.4°C) in November to a frosty 47.5°F (8.6°C). In December, the recorded average low-temperature in Greenbrier is an icy 34.9°F (1.6°C).Humidity
The months with the highest humidity are March, May and December, with an average relative humidity of 79%.Rainfall
In Greenbrier, in December, it is raining for 12.2 days, with typically 2.87" (73mm) of accumulated precipitation. In Greenbrier, Tennessee, during the entire year, the rain falls for 174.6 days and collects up to 37.68" (957mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Greenbrier. In Greenbrier, during December, snow falls for 2.8 days and regularly aggregates up to 0.67" (17mm) of snow. In Greenbrier, during the entire year, snow falls for 14.9 days and aggregates up to 4.06" (103mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of December in Greenbrier, sunrise is at 6:40 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 4:42 pm CST.
Sunshine
In Greenbrier, the average sunshine in December is 4.6h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Greenbrier, TN
- Average high temperature in December: 47.5°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (43°F).
- Average low temperature in December: 34.9°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in December
Greenbrier, TN
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Greenbrier, TN
- Average wind speed in December: 7.9mph
The windiest month (with the highest average wind speed) is February (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
Greenbrier, TN
- Average humidity in December: 79%
The months with the highest relative humidity are March, May and December (79%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Greenbrier, TN
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is July (4.37").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in December
Greenbrier, TN
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is November (9.7 days).
Average snowfall in December
Greenbrier, TN
- Average snowfall in December: 0.67"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Greenbrier, TN
- Average snowfall days in December: 2.8 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Greenbrier, 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: 4h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Greenbrier, TN
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in December
Greenbrier, 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
Greenbrier, TN
- Average cloud cover in December: 53
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in December
Greenbrier, TN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
