December weather forecastSmyrna, TN
December
Weather in December
Winter takes center stage in December in Smyrna, Tennessee, settling down with a blanket of cold. As the month progresses, temperatures dip lower, culminating in a chilly end to the year. The skies often mirror these changes, going from scattered clouds to a denser covering as the days pass. And while the winter sunshine is still a part of December's narrative, it is far more muted than in previous months. The onset of widespread snowfall, with accumulations reaching up to 0.39" (10mm), is a visual indication of the full-fledged arrival of winter, fittingly capping off the year on a serene, crystalline note.Temperature
The start of December involves a subtle temperature drop, shifting from a mild 57.7°F (14.3°C) in November to a chilly 49.3°F (9.6°C). Throughout the December nights, Smyrna encounters a low-temperature of 36.1°F (2.3°C).Humidity
The most humid month is December, with an average relative humidity of 78%.Rainfall
In Smyrna, Tennessee, in December, it is raining for 11.1 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 150.1 rainfall days, and 24.41" (620mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Smyrna, in December, during 2.5 snowfall days, 0.39" (10mm) of snow is typically accumulated. Throughout the year, in Smyrna, there are 12.1 snowfall days, and 2.24" (57mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 48min of daylight.On the first day of the month, sunrise is at 6:38 am and sunset at 4:32 pm. On the last day of December, sunrise is at 6:56 am and sunset at 4:42 pm CST.
Sunshine
In December, the average sunshine is 4.5h.UV index
The months with the lowest UV index are 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 rays for the average person.Note: The maximum UV index of 2 during December translates into these guidelines:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Smyrna, TN
- Average high temperature in December: 49.3°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in December: 36.1°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in December
Smyrna, TN
- Average pressure in December: 30.15"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Smyrna, TN
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is February (8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Smyrna, TN
- Average humidity in December: 78%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are June, August and October (73%).
Average rainfall in December
Smyrna, TN
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is November (1.38").
Average rainfall days in December
Smyrna, TN
- Average rainfall days in December: 11.1 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is November (7.7 days).
Average snowfall in December
Smyrna, TN
- Average snowfall in December: 0.39"
The month with the highest snowfall is January (0.71").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Smyrna, TN
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (3.5 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
Smyrna, TN
- Average daylight in December: 9h and 48min
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 48min).
- Average sunshine in December: 4h and 30min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Smyrna, TN
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in December
Smyrna, 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 February and December (UV index 2).
Average cloud cover in December
Smyrna, TN
- Average cloud cover in December: 52
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
Smyrna, TN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
