December weather forecast
Cosby, TN

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Weather in December

The first month of the winter, December, is also a frosty month in Cosby, Tennessee, with temperature in the range of an average low of 34.3°F (1.3°C) and an average high of 49.1°F (9.5°C).

Temperature

The shift from November to December coincides with a small decrease in the average high-temperature, down to a frosty 49.1°F (9.5°C) from a mild 57°F (13.9°C). In the month of December, Cosby records a consistent average low-temperature of 34.3°F (1.3°C).

Humidity

The months with the highest humidity in Cosby are February and December, with an average relative humidity of 78%.

Rainfall

In Cosby, in December, during 11.5 rainfall days, 2.64" (67mm) of precipitation is typically accumulated. In Cosby, during the entire year, the rain falls for 155.9 days and collects up to 24.02" (610mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Cosby. The month with the most snowfall is December, when snow falls for 4.6 days and typically aggregates up to 2.48" (63mm) of snow.

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 7:25 am and sunset at 5:19 pm. On the last day of December, in Cosby, Tennessee, sunrise is at 7:42 am and sunset at 5:29 pm EST.

Sunshine

The average sunshine in December in Cosby is 5.6h.

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 value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Enhance your sun protection with tightly woven, yet airy clothing. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

What is the usual temperature for Cosby in December?

The average high-temperature, in December, in Cosby, is 49.1°F (9.5°C), while the average low-temperature is 34.3°F (1.3°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 95°F (35°C).

What is the most humid month in Cosby?

February and December, with an average relative humidity of 78%, are most humid months in Cosby.

What is the average humidity in December in Cosby?

In Cosby, Tennessee, the average relative humidity in December is 78%.

How many days does it rain in December in Cosby?

In Cosby, in December, during 11.5 rainfall days, 2.64" (67mm) of precipitation is typically accumulated.

What is the snowiest month in Cosby?

The month with the most snowfall in Cosby, Tennessee, is December, when snow falls for 4.6 days and typically aggregates up to 2.48" (63mm) of snow.

How many days does it snow in December in Cosby?

In Cosby, Tennessee, in December, snow falls for 4.6 days, with typically accumulated 2.48" (63mm) of snow.

What is the month with the shortest days in Cosby?

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

How many hours of daylight does Cosby have in December?

In Cosby, Tennessee, the average day length in December is 9h and 47min.

When are sunrise and sunset in December in Cosby?

In December, on the first day of the month, sunrise is at 7:25 am and sunset at 5:19 pm. On the last day of the month, in Cosby, Tennessee, sunrise is at 7:42 am and sunset at 5:29 pm EST.

How many hours of sunshine does Cosby have in December?

In Cosby, the average sunshine duration in December is 5.6h.

What is the month with the lowest UV index in Cosby?

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

How high is the UV index in December in Cosby?

In Cosby, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes 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
Cosby, TN

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

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (44.6°F).

  • Average low temperature in December: 34.3°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).

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Average pressure in December
Cosby, TN

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

The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

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Average wind speed in December
Cosby, TN

Average wind speed in December - Cosby, TN
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in December
Cosby, TN

Average humidity in December - Cosby, TN
  • Average humidity in December: 78%

The months with the highest relative humidity are February and December (78%).
The months with the lowest relative humidity are July and August (73%).

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Average rainfall in December
Cosby, TN

Average rainfall in December - Cosby, TN
  • Average rainfall in December: 2.64"

The wettest month (with the highest rainfall) is February (2.87").
The driest month (with the least rainfall) is September (1.42").

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Average rainfall days in December
Cosby, TN

Average rainfall days in December - Cosby, TN
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is November (10 days).

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Average snowfall in December
Cosby, TN

Average snowfall in December - Cosby, TN
  • Average snowfall in December: 2.48"

The month with the highest snowfall is December (2.48").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Cosby, TN

Average snowfall days in December - Cosby, TN
  • Average snowfall days in December: 4.6 days

The month with the highest number of snowfall days is January (6.6 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
Cosby, TN

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

The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).

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Average sunshine days in December
Cosby, TN

Average sunshine days in December - Cosby, TN
  • Average sunshine days in December: 15.9 days

The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is July (12 days).

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Average UV index in December
Cosby, TN

Average UV index in December - Cosby, 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).

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Average cloud cover in December
Cosby, TN

Average cloud cover in December - Cosby, TN
  • Average cloud cover in December: 43

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 26).

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Average visibility in December
Cosby, TN

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

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

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Cosby, Tennessee, USA

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