December weather forecastCrystal, TN
December
Weather in December
December, the first month of the winter in Crystal, is still a chilly month, with an average temperature ranging between min 35.2°F (1.8°C) and max 47.3°F (8.5°C).Temperature
Crystal, Tennessee, in December demonstrates a small temperature transition, adjusting from an average high of a moderate 56.3°F (13.5°C) in November to a frosty 47.3°F (8.5°C). In Crystal, an average nighttime temperature of 35.2°F (1.8°C) is expected during December.Humidity
In Crystal, the average relative humidity in December is 78%.Rainfall
In Crystal, in December, during 12.1 rainfall days, 3.31" (84mm) of precipitation is typically accumulated. In Crystal, during the entire year, the rain falls for 159.3 days and collects up to 39.69" (1008mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Crystal, in December, snow falls for 1.1 days, with typically accumulated 0.55" (14mm) of snow. In Crystal, during the entire year, snow falls for 9.2 days and aggregates up to 4.65" (118mm) of snow.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:50 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:08 am and sunset at 4:51 pm CST.
Sunshine
The average sunshine in December is 4.8h.UV index
The months with the lowest UV index in Crystal, Tennessee, 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 radiation for the average person.Note: In December, a daily UV index of 2 turns into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Warning! The reflection from snow can nearly 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
Crystal, TN
- Average high temperature in December: 47.3°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in December: 35.2°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in December
Crystal, 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 (29.95"Hg).
Average wind speed in December
Crystal, TN
- Average wind speed in December: 8.6mph
The windiest months (with the highest average wind speed) are February, March and April (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Crystal, TN
- Average humidity in December: 78%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (69%).
Average rainfall in December
Crystal, TN
- Average rainfall in December: 3.31"
The wettest month (with the highest rainfall) is April (4.57").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in December
Crystal, TN
- Average rainfall days in December: 12.1 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in December
Crystal, TN
- Average snowfall in December: 0.55"
The month with the highest snowfall is March (1.69").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Crystal, TN
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is January (3.3 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
Crystal, 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 48min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Crystal, TN
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in December
Crystal, TN
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are February and December (UV index 2).
Average cloud cover in December
Crystal, TN
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in December
Crystal, 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).
