December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average snowfall days in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

The scenic scape of the little town of Knoxville in Tennessee

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 in Knoxville is all about the chilly winds, crackling fireplaces, and anticipation of a snowy New Year.

Temperature

Knoxville's December weather features a light decline in high-temperatures, reducing from a mild 57.2°F (14°C) in November to a chilly 49.1°F (9.5°C). Knoxville anticipates an average minimum temperature of 35.1°F (1.7°C) in the month of December.

Humidity

The months with the highest humidity are February and December, with an average relative humidity of 78%.

Rainfall

In December, the rain falls for 12.2 days. Throughout December, 3.07" (78mm) of precipitation is 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, during December, snow falls for 1.7 days and regularly aggregates up to 0.47" (12mm) of snow. Throughout the year, there are 11.5 snowfall days, and 3.94" (100mm) of snow is accumulated.

Daylight

With an average of 9h and 48min of daylight, December has the shortest days of the year in Knoxville.
On the first day of the month, sunrise is at 7:28 am and sunset at 5:21 pm. On the last day of December, sunrise is at 7:46 am and sunset at 5:32 pm EST.

Sunshine

In December, the average sunshine in Knoxville, Tennessee, is 5h.

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 estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: A maximum UV index of 2 in December translates into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.

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Frequently asked questions

What are December temperatures in Knoxville?

The high-temperature during December is 49.1°F (9.5°C) and the low-temperature is 35.1°F (1.7°C). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 87.8°F (31°C).

What are the most humid months in Knoxville?

The months with the highest humidity in Knoxville are February and December, with an average relative humidity of 78%.

What is the average humidity in December in Knoxville?

In Knoxville, the average relative humidity in December is 78%.

How many days does it rain in December in Knoxville?

In Knoxville, Tennessee, during December, the rain falls for 12.2 days and regularly aggregates up to 3.07" (78mm) of precipitation.

How many days does it snow in December in Knoxville?

In Knoxville, during December, snow falls for 1.7 days and regularly aggregates up to 0.47" (12mm) of snow.

What is the month with the shortest days in Knoxville?

December has the shortest days of the year in Knoxville, Tennessee, with an average of 9h and 48min of daylight.

How many hours of daylight does Knoxville have in December?

In December, the average day length in Knoxville, Tennessee, is 9h and 46min.

When are sunrise and sunset in December in Knoxville?

In December, on the first day of the month, 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.

How many hours of sunshine does Knoxville have in December?

In Knoxville, the average sunshine duration in December is 5h.

When is the lowest UV index in Knoxville?

The months with the lowest UV index in Knoxville, Tennessee, are January, February and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Knoxville?

The average daily maximum UV index in December in Knoxville is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

57.2°F 14°C

49.1°F 9.5°C

44.8°F 7.1°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.2mph 8.4km/h

5.7mph 9.2km/h

6mph 9.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

Average UV index

Average cloud cover

Average visibility

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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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Average daylight in December /
Average sunshine in December
Knoxville, TN

Average daylight in December: 9h and 5min

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).

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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).

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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).

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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).

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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).

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December weather forecast
Knoxville, TN

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