December weather forecast
Rock Castle, TN

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Weather in December

The first month of the winter, December, is still a chilly month in Rock Castle, Tennessee, with an average temperature ranging between min 35.1°F (1.7°C) and max 48.6°F (9.2°C).

Temperature

December implies a soft temperature shift, with average high-temperatures reducing from November's moderate 56.5°F (13.6°C) to a frosty 48.6°F (9.2°C). Rock Castle experiences an average temperature drop to a cold 35.1°F (1.7°C) during December nights.

Humidity

December is the most humid month in Rock Castle, with an average relative humidity of 80%.

Rainfall

In Rock Castle, in December, it is raining for 12.7 days, with typically 3.15" (80mm) of accumulated precipitation. In Rock Castle, Tennessee, during the entire year, the rain falls for 170.4 days and collects up to 37.99" (965mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Rock Castle, in December, snow falls for 2.5 days, with typically accumulated 0.55" (14mm) of snow. Throughout the year, in Rock Castle, Tennessee, there are 13.4 snowfall days, and 4.29" (109mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 48min of daylight.
On the first day of the month, sunrise is at 6:35 am and sunset at 4:28 pm. On the last day of December, sunrise is at 6:53 am and sunset at 4:38 pm CST.

Sunshine

In Rock Castle, the average sunshine in December is 4.8h.

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 threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures in Rock Castle?

During December, Rock Castle experiences an average high-temperature of 48.6°F (9.2°C) and a low-temperature of 35.1°F (1.7°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is appraised at 98.6°F (37°C).

What is the most humid month in Rock Castle?

The most humid month is December, with an average relative humidity of 80%.

What is the average humidity in December in Rock Castle?

In December, the average relative humidity in Rock Castle is 80%.

How many days does it rain in December in Rock Castle?

In Rock Castle, Tennessee, in December, it is raining for 12.7 days, with typically 3.15" (80mm) of accumulated precipitation.

How much does it snow in Rock Castle in December?

In December, in Rock Castle, Tennessee, it is snowing for 2.5 days. Throughout December, 0.55" (14mm) of snow is accumulated.

What is the month with the shortest days in Rock Castle?

The month with the shortest days is December, with an average of 9h and 48min of daylight.

How many hours of daylight does Rock Castle have in December?

In December, the average day length in Rock Castle is 9h and 46min.

When are sunrise and sunset in December in Rock Castle?

On the first day of December, sunrise is at 6:35 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 4:38 pm CST.

How many hours of sunshine does Rock Castle have in December?

The average sunshine duration in December in Rock Castle, Tennessee, is 4.8h.

When is the lowest UV index in Rock Castle?

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

How high is the UV index in December in Rock Castle?

In Rock Castle, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Rock Castle, TN

Average temperature in December - Rock Castle, TN
  • Average high temperature in December: 48.6°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (43.9°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 (29.7°F).

Average pressure in December
Rock Castle, TN

Average pressure in December - Rock Castle, TN
  • Average pressure in December: 30.15"Hg

The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

Average wind speed in December
Rock Castle, TN

Average wind speed in December - Rock Castle, TN
  • Average wind speed in December: 6.7mph

The windiest month (with the highest average wind speed) is February (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

Average humidity in December
Rock Castle, TN

Average humidity in December - Rock Castle, TN
  • Average humidity in December: 80%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is November (75%).

Average rainfall in December
Rock Castle, TN

Average rainfall in December - Rock Castle, TN
  • Average rainfall in December: 3.15"

The wettest month (with the highest rainfall) is February (4.09").
The driest month (with the least rainfall) is September (1.97").

Average rainfall days in December
Rock Castle, TN

Average rainfall days in December - Rock Castle, TN
  • Average rainfall days in December: 12.7 days

The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is November (9.5 days).

Average snowfall in December
Rock Castle, TN

Average snowfall in December - Rock Castle, TN
  • Average snowfall in December: 0.55"

The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Rock Castle, TN

Average snowfall days in December - Rock Castle, TN
  • Average snowfall days in December: 2.5 days

The month with the highest number of snowfall days is January (3.9 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
Rock Castle, TN

Average daylight in December / Average sunshine in December - Rock Castle, 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: 4h and 5min

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 24min).

Average sunshine days in December
Rock Castle, TN

Average sunshine days in December - Rock Castle, TN
  • Average sunshine days in December: 16.3 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (10.3 days).

Average UV index in December
Rock Castle, TN

Average UV index in December - Rock Castle, 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
Rock Castle, TN

Average cloud cover in December - Rock Castle, TN
  • Average cloud cover in December: 50

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 29).

Average visibility in December
Rock Castle, TN

Average visibility in December - Rock Castle, TN
  • Average visibility in December: 6mi

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

Rock Castle, Tennessee, USA

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