December weather forecast
Decaturville, TN

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Weather in December

December, the first month of the winter in Decaturville, is also a frosty month, with an average temperature fluctuating between 49.6°F (9.8°C) and 36.7°F (2.6°C).

Temperature

In Decaturville, the beginning of December is marked by a marginally lowered average high-temperature, shifting from November's mild 57.9°F (14.4°C) to a frosty 49.6°F (9.8°C). Decaturville's nights in December cool down to an average low-temperature of 36.7°F (2.6°C).

Humidity

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

Rainfall

In Decaturville, in December, it is raining for 9.7 days, with typically 1.38" (35mm) of accumulated precipitation. Throughout the year, in Decaturville, there are 130.6 rainfall days, and 16.89" (429mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall in Decaturville. In Decaturville, in December, during 1.7 snowfall days, 0.24" (6mm) of snow is typically accumulated. Throughout the year, there are 7.9 snowfall days, and 1.26" (32mm) 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 6:44 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:01 am and sunset at 4:49 pm CST.

Sunshine

In Decaturville, the average sunshine in December is 4.8h.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.
Note: The UV index of 2 during December translates into the following guidance:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
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Frequently asked questions

What is the average December temperature in Decaturville?

The average high-temperature, in December, in Decaturville, is 49.6°F (9.8°C), while the average low-temperature is 36.7°F (2.6°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 89.6°F (32°C).

What is the most humid month in Decaturville?

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

What is the average humidity in December in Decaturville?

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

How many days does it rain in December in Decaturville?

In Decaturville, Tennessee, in December, it is raining for 9.7 days, with typically 1.38" (35mm) of accumulated precipitation.

How many days does it snow in December in Decaturville?

In December, it is snowing for 1.7 days. Throughout December, 0.24" (6mm) of snow is accumulated.

What is the month with the shortest days in Decaturville?

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

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

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

When are sunrise and sunset in December in Decaturville?

On the first day of December, sunrise is at 6:44 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 4:49 pm CST.

How many hours of sunshine does Decaturville have in December?

In December, the average sunshine duration in Decaturville is 4.8h.

When is the lowest UV index in Decaturville?

December is the month with the lowest UV index, with an average maximum UV index of 2.

What is the UV index reading in December in Decaturville?

In December, the average daily maximum UV index in Decaturville, Tennessee, is 2. A UV Index estimate of 2, and below, represents 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
Decaturville, TN

Average temperature in December - Decaturville, TN
  • Average high temperature in December: 49.6°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (45.5°F).

  • Average low temperature in December: 36.7°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).

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Average pressure in December
Decaturville, TN

Average pressure in December - Decaturville, 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 (29.96"Hg).

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Average wind speed in December
Decaturville, TN

Average wind speed in December - Decaturville, TN
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is February (8.2mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).

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Average humidity in December
Decaturville, TN

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

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

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Average rainfall in December
Decaturville, TN

Average rainfall in December - Decaturville, TN
  • Average rainfall in December: 1.38"

The wettest month (with the highest rainfall) is February (1.97").
The driest month (with the least rainfall) is September (0.94").

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Average rainfall days in December
Decaturville, TN

Average rainfall days in December - Decaturville, TN
  • Average rainfall days in December: 9.7 days

The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (7.7 days).

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Average snowfall in December
Decaturville, TN

Average snowfall in December - Decaturville, TN
  • Average snowfall in December: 0.24"

The month with the highest snowfall is November (0.35").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Decaturville, TN

Average snowfall days in December - Decaturville, TN
  • Average snowfall days in December: 1.7 days

The month with the highest number of snowfall days is February (2.3 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
Decaturville, TN

Average daylight in December / Average sunshine in December - Decaturville, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Decaturville, TN

Average sunshine days in December - Decaturville, TN
  • Average sunshine days in December: 18.7 days

The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is July (12.4 days).

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Average UV index in December
Decaturville, TN

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

The month with the highest UV index is June (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in December
Decaturville, TN

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

The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).

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Average visibility in December
Decaturville, TN

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

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

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Decaturville, Tennessee, USA

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