December weather forecast
Mason, TN

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Weather in December

December, the first month of the winter in Mason, is still a chilly month, with an average temperature fluctuating between 49.8°F (9.9°C) and 37.2°F (2.9°C).

Temperature

Mason, Tennessee, in December experiences a gentle temperature dip, with average high-temperatures reducing from a mild 58.3°F (14.6°C) in November to a chilly 49.8°F (9.9°C). Mason experiences an average temperature drop to an icy 37.2°F (2.9°C) during December nights.

Humidity

The average relative humidity in December in Mason is 77%.

Rainfall

In Mason, in December, during 8.5 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Mason, during the entire year, the rain falls for 130.1 days and collects up to 16.5" (419mm) of precipitation.

Snowfall

Months with snowfall in Mason are January through March, November and December. In December, it is snowing for 0.4 days. Throughout December, 0.2" (5mm) of snow is accumulated. Throughout the year, in Mason, there are 3.9 snowfall days, and 1.02" (26mm) of snow is accumulated.

Daylight

With an average of 9h and 48min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:49 am and sunset at 4:45 pm. On the last day of December, sunrise is at 7:07 am and sunset at 4:55 pm CST.

Sunshine

In December, the average sunshine in Mason is 5h.

UV index

The months with the lowest UV index are January 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 rays for average individuals.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. 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. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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Frequently asked questions

What is the usual temperature for Mason in December?

In Mason, 49.8°F (9.9°C) is the average high-temperature and 37.2°F (2.9°C) is the average low-temperature during December. In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, is appraised at 87.8°F (31°C).

What is the average humidity in December in Mason?

In December, the average relative humidity in Mason is 77%.

How many days does it rain in December in Mason?

In Mason, during December, the rain falls for 8.5 days and regularly aggregates up to 1.54" (39mm) of precipitation.

How much does it snow in Mason in December?

In Mason, Tennessee, during December, snow falls for 0.4 days and regularly aggregates up to 0.2" (5mm) of snow.

What is the month with the shortest days in Mason?

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

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

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

When are sunrise and sunset in December in Mason?

In December, on the first day of the month, sunrise is at 6:49 am and sunset at 4:45 pm. On the last day of the month, in Mason, sunrise is at 7:07 am and sunset at 4:55 pm CST.

How long on average sun shines in December in Mason?

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

When is the lowest UV index in Mason?

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

What is the UV index intensity in December in Mason?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health 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
Mason, TN

Average temperature in December - Mason, TN
  • Average high temperature in December: 49.8°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (45.9°F).

  • Average low temperature in December: 37.2°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).

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Average pressure in December
Mason, TN

Average pressure in December - Mason, TN
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in December
Mason, TN

Average wind speed in December - Mason, TN
  • Average wind speed in December: 8.7mph

The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).

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Average humidity in December
Mason, TN

Average humidity in December - Mason, TN
  • Average humidity in December: 77%

The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in December
Mason, TN

Average rainfall in December - Mason, TN
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is July (1.85").
The driest month (with the least rainfall) is September (0.79").

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Average rainfall days in December
Mason, TN

Average rainfall days in December - Mason, TN
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is July (14.4 days).
The month with the least rainy days is November (7.5 days).

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Average snowfall in December
Mason, TN

Average snowfall in December - Mason, TN
  • Average snowfall in December: 0.2"

The month with the highest snowfall is February (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Mason, TN

Average snowfall days in December - Mason, TN
  • Average snowfall days in December: 0.4 days

The month with the highest number of snowfall days is February (1.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Mason, 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: 5h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in December
Mason, TN

Average sunshine days in December - Mason, TN
  • Average sunshine days in December: 21.1 days

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is August (13.7 days).

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Average UV index in December
Mason, TN

Average UV index in December - Mason, TN
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in December
Mason, TN

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

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 25).

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Average visibility in December
Mason, TN

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

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

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Mason, Tennessee, USA

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