December weather forecast
Birchwood, TN

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Weather in December

The first month of the winter, December, is still a chilly month in Birchwood, Tennessee, with an average temperature fluctuating between 35.2°F (1.8°C) and 49.1°F (9.5°C).

Temperature

December brings a slight decrease in the average high-temperature, shifting from a moderate 57°F (13.9°C) in November to a frosty 49.1°F (9.5°C). In December, the temperature drops to an average of 35.2°F (1.8°C) at night.

Humidity

December is the most humid month in Birchwood, with an average relative humidity of 81%.

Rainfall

The month with the most rainfall is December, when the rain falls for 12.3 days and typically aggregates up to 3.15" (80mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Birchwood, in December, during 1.2 snowfall days, 0.35" (9mm) of snow is typically accumulated. Throughout the year, there are 9.6 snowfall days, and 1.61" (41mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 48min of daylight.
On the first day of the month, sunrise is at 7:31 am and sunset at 5:27 pm. On the last day of December, sunrise is at 7:48 am and sunset at 5:37 pm EST.

Sunshine

December has the least sunshine of the year, with an average of 4.9h of sunshine.

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: An average UV index of 2 in December transforms into this advice:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Updated: Jun 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures?

In Birchwood, in December, the average high-temperature is 49.1°F (9.5°C), and the average low-temperature is 35.2°F (1.8°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 86°F (30°C).

What is the most humid month?

With an average relative humidity of 81%, December is the most humid month.

What is the average humidity in December?

The average relative humidity in December is 81%.

What is the rainiest month?

December is the month with the most rainfall. Rain falls for 12.3 days and accumulates 3.15" (80mm) of precipitation.

How much does it rain in December?

In Birchwood, in December, during 12.3 rainfall days, 3.15" (80mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Birchwood, in December, during 1.2 snowfall days, 0.35" (9mm) of snow is typically accumulated.

What is the month with the shortest days?

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

How many hours of daylight does Birchwood have in December?

In Birchwood, Tennessee, the average day length in December is 9h and 49min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:31 am and sunset at 5:27 pm. On the last day of the month, in Birchwood, sunrise is at 7:48 am and sunset at 5:37 pm EST.

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 4.9h of sunshine.

How long on average sun shines in December?

The average sunshine duration in December is 4.9h.

What is the month with the lowest UV index?

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

What is the UV index reading in December?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe 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
Birchwood, TN

Average temperature in December - Birchwood, TN
  • Average high temperature in December: 49.1°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (45°F).

  • Average low temperature in December: 35.2°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).

Average pressure in December
Birchwood, TN

Average pressure in December - Birchwood, 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 (29.98"Hg).

Average wind speed in December
Birchwood, TN

Average wind speed in December - Birchwood, TN
  • Average wind speed in December: 5.9mph

The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (3.9mph).

Average humidity in December
Birchwood, TN

Average humidity in December - Birchwood, TN
  • Average humidity in December: 81%

The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are January, June, July, August, September, October and November (76%).

Average rainfall in December
Birchwood, TN

Average rainfall in December - Birchwood, TN
  • Average rainfall in December: 3.15"

The wettest month (with the highest rainfall) is December (3.15").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in December
Birchwood, TN

Average rainfall days in December - Birchwood, TN
  • Average rainfall days in December: 12.3 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (8.7 days).

Average snowfall in December
Birchwood, TN

Average snowfall in December - Birchwood, TN
  • Average snowfall in December: 0.35"

The month with the highest snowfall is January (0.51").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Birchwood, TN

Average snowfall days in December - Birchwood, TN
  • Average snowfall days in December: 1.2 days

The month with the highest number of snowfall days is January (3.4 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
Birchwood, TN

Average daylight in December / Average sunshine in December - Birchwood, TN
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 30min).
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 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

Average sunshine days in December
Birchwood, TN

Average sunshine days in December - Birchwood, TN
  • Average sunshine days in December: 17.1 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (11.5 days).

Average UV index in December
Birchwood, TN

Average UV index in December - Birchwood, 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
Birchwood, TN

Average cloud cover in December - Birchwood, TN
  • Average cloud cover in December: 50

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 32).

Average visibility in December
Birchwood, TN

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

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

Birchwood, Tennessee, USA

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