December weather forecast
Unionville, TN

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Weather in December

December, the first month of the winter in Unionville, is still a cool month, with an average temperature varying between 36.3°F (2.4°C) and 50°F (10°C).

Temperature

December signifies a gentle decline in Unionville's average high-temperature, easing from a mild 57.6°F (14.2°C) in November to a fresh 50°F (10°C). Throughout December, the average low-temperature dips to an icy 36.3°F (2.4°C).

Humidity

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

Rainfall

In Unionville, in December, it is raining for 12.1 days, with typically 3.35" (85mm) of accumulated precipitation. Throughout the year, there are 167.2 rainfall days, and 38.78" (985mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Unionville, in December, during 2 snowfall days, 0.55" (14mm) of snow is typically accumulated. Throughout the year, there are 10.7 snowfall days, and 2.83" (72mm) 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 December, sunrise is at 6:38 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:43 pm CST.

Sunshine

In Unionville, the average sunshine in December is 4.6h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Aug 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures?

In December, the average high-temperature and low-temperature are 50°F (10°C) and 36.3°F (2.4°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, in September is evaluated at 86°F (30°C).

What is the most humid month?

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

What is the average humidity in December?

The average relative humidity in December is 80%.

How much does it rain in December?

In Unionville, during December, the rain falls for 12.1 days and regularly aggregates up to 3.35" (85mm) of precipitation.

How much does it snow in December?

In Unionville, in December, snow falls for 2 days, with typically accumulated 0.55" (14mm) of snow.

What is the month with the shortest days?

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

How many hours of daylight does Unionville have in December?

In December, the average day length is 9h and 48min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 6:38 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:43 pm CST.

How long on average sun shines in December?

In Unionville, Tennessee, the average sunshine duration in December is 4.6h.

What is the month with the lowest UV index?

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

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 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
Unionville, TN

Average temperature in December - Unionville, TN
  • Average high temperature in December: 50°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (45.5°F).

  • Average low temperature in December: 36.3°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

Average pressure in December
Unionville, TN

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

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

Average wind speed in December
Unionville, TN

Average wind speed in December - Unionville, TN
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).

Average humidity in December
Unionville, TN

Average humidity in December - Unionville, TN
  • Average humidity in December: 80%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (74%).

Average rainfall in December
Unionville, TN

Average rainfall in December - Unionville, TN
  • Average rainfall in December: 3.35"

The wettest month (with the highest rainfall) is February (4.33").
The driest month (with the least rainfall) is September (2.09").

Average rainfall days in December
Unionville, TN

Average rainfall days in December - Unionville, TN
  • Average rainfall days in December: 12.1 days

The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (8.9 days).

Average snowfall in December
Unionville, TN

Average snowfall in December - Unionville, TN
  • Average snowfall in December: 0.55"

The month with the highest snowfall is February (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Unionville, TN

Average snowfall days in December - Unionville, TN
  • Average snowfall days in December: 2 days

The month with the highest number of snowfall days is January (3.1 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
Unionville, TN

Average daylight in December / Average sunshine in December - Unionville, 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 4min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

Average sunshine days in December
Unionville, TN

Average sunshine days in December - Unionville, TN
  • Average sunshine days in December: 16.7 days

The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is July (10.1 days).

Average UV index in December
Unionville, TN

Average UV index in December - Unionville, 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 and December (UV index 2).

Average cloud cover in December
Unionville, TN

Average cloud cover in December - Unionville, TN
  • Average cloud cover in December: 52

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 31).

Average visibility in December
Unionville, TN

Average visibility in December - Unionville, TN
  • Average visibility in December: 6mi

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

Unionville, Tennessee, USA

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