December weather forecast
Morristown, TN

Weather in December

The first month of the winter, December, is still a chilly month in Morristown, Tennessee, with an average temperature fluctuating between 48.2°F (9°C) and 34°F (1.1°C).

Temperature

In December, the average high-temperature slightly decreases from a mild 56.1°F (13.4°C) in November to a frosty 48.2°F (9°C). In Morristown, in December, the average low-temperature is 34°F (1.1°C).

Humidity

February and December, with an average relative humidity of 79%, are the most humid months in Morristown.

Rainfall

In Morristown, during December, the rain falls for 13.8 days and regularly aggregates up to 3.23" (82mm) of precipitation. Throughout the year, in Morristown, there are 172.1 rainfall days, and 31.02" (788mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Morristown are January through April, October through December. December is the month with the most snowfall. Snow falls for 5.5 days and accumulates 2.83" (72mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 44min of daylight.
On the first day of the month, sunrise is at 7:25 am and sunset at 5:18 pm. On the last day of December, in Morristown, sunrise is at 7:44 am and sunset at 5:28 pm EST.

Sunshine

The average sunshine in December in Morristown is 5.4h.

UV index

The months with the lowest UV index in Morristown 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 the average person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What are the most humid months in Morristown?

The months with the highest humidity in Morristown, Tennessee, are February and December, with an average relative humidity of 79%.

What is the average humidity in December in Morristown?

In Morristown, Tennessee, the average relative humidity in December is 79%.

How many days does it rain in December in Morristown?

In Morristown, Tennessee, in December, during 13.8 rainfall days, 3.23" (82mm) of precipitation is typically accumulated.

What is the snowiest month in Morristown?

December is the month with the most snowfall in Morristown, Tennessee. Snow falls for 5.5 days and accumulates 2.83" (72mm) of snow.

How many days does it snow in December in Morristown?

In Morristown, during December, snow falls for 5.5 days and regularly aggregates up to 2.83" (72mm) of snow.

What is the month with the shortest days in Morristown?

The month with the shortest days is December, with an average of 9h and 44min of daylight.

What is the average length of the day in December in Morristown?

In Morristown, the average day length in December is 9h and 44min.

When is the sunrise / sunset in December in Morristown?

In December, on the first day of the month, sunrise is at 7:25 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 5:28 pm EST.

How long on average sun shines in December in Morristown?

The average sunshine duration in December in Morristown, Tennessee, is 5.4h.

When is the lowest UV index in Morristown?

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

What is the UV index intensity in December in Morristown?

In December, the average daily maximum UV index in Morristown is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Morristown, TN

Average temperature in December - Morristown, TN
  • Average high temperature in December: 48.2°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (43.2°F).

  • Average low temperature in December: 34°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).

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Average pressure in December
Morristown, TN

Average pressure in December - Morristown, 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 (29.99"Hg).

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Average wind speed in December
Morristown, TN

Average wind speed in December - Morristown, TN
  • Average wind speed in December: 5.3mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in December
Morristown, TN

Average humidity in December - Morristown, TN
  • Average humidity in December: 79%

The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is August (73%).

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Average rainfall in December
Morristown, TN

Average rainfall in December - Morristown, TN
  • Average rainfall in December: 3.23"

The wettest month (with the highest rainfall) is February (3.66").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in December
Morristown, TN

Average rainfall days in December - Morristown, TN
  • Average rainfall days in December: 13.8 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (10.6 days).

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Average snowfall in December
Morristown, TN

Average snowfall in December - Morristown, TN
  • Average snowfall in December: 2.83"

The month with the highest snowfall is December (2.83").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Morristown, TN

Average snowfall days in December - Morristown, TN
  • Average snowfall days in December: 5.5 days

The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Morristown, TN
  • Average daylight in December: 9h and 44min

The month with the longest days is June (Average daylight: 14h and 35min).
The month with the shortest days is December (Average daylight: 9h and 44min).

  • Average sunshine in December: 5h and 24min

The months with the most sunshine are June and July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).

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Average sunshine days in December
Morristown, TN

Average sunshine days in December - Morristown, TN
  • Average sunshine days in December: 14.1 days

The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is February (10.3 days).

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Average UV index in December
Morristown, TN

Average UV index in December - Morristown, 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
Morristown, TN

Average cloud cover in December - Morristown, TN
  • Average cloud cover in December: 46

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 27).

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Average visibility in December
Morristown, TN

Average visibility in December - Morristown, TN
  • Average visibility in December: 5mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

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