December weather forecastKnoxville, TN
December
Weather in December
Knoxville embraces winter in its full form by December. Following November, the temperature continues its downward trend to solidify December as a distinctively frigid month. With an average high of 49.1°F (9.5°C), it announces winter's arrival definitively. Despite the lower temperatures, snowfall remains minimal. Thus, December is all about the chilly winds, crackling fireplaces, and anticipation of a snowy New Year.Temperature
Knoxville, Tennessee, observes a small decrease in the average high-temperature with the arrival of December, falling from November's refreshing 57.2°F (14°C) to a chilly 49.1°F (9.5°C). Knoxville experiences a nighttime temperature average of 35.1°F (1.7°C) during December.Humidity
February and December, with an average relative humidity of 78%, are the most humid months.Rainfall
In Knoxville, in December, during 12.2 rainfall days, 3.07" (78mm) of precipitation is typically accumulated. In Knoxville, during the entire year, the rain falls for 148.9 days and collects up to 29.57" (751mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Knoxville, in December, snow falls for 1.7 days, with typically accumulated 0.47" (12mm) of snow. In Knoxville, Tennessee, during the entire year, snow falls for 11.5 days and aggregates up to 3.94" (100mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 48min of daylight.On the first day of December, sunrise is at 7:28 am and sunset at 5:21 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 5:32 pm EST.
Sunshine
The average sunshine in December is 5h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 2 in December suggests the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Observe! Snow reflection can nearly intensify 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
Knoxville, TN
- Average high temperature in December: 49.1°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (44.8°F).
- Average low temperature in December: 35.1°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in December
Knoxville, TN
- Average pressure in December: 30.14"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
Knoxville, TN
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Knoxville, TN
- Average humidity in December: 78%
The months with the highest relative humidity are February and December (78%).
The month with the lowest relative humidity is August (70%).
Average rainfall in December
Knoxville, TN
- Average rainfall in December: 3.07"
The wettest month (with the highest rainfall) is February (3.66").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in December
Knoxville, TN
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is November (8.4 days).
Average snowfall in December
Knoxville, TN
- Average snowfall in December: 0.47"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Knoxville, TN
- Average snowfall days in December: 1.7 days
The month with the highest number of snowfall days is January (3.8 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
Knoxville, 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: 5h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in December
Knoxville, TN
- Average sunshine days in December: 17 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
Knoxville, 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
Knoxville, TN
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Knoxville, TN
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
