Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December sees a slight reduction in average high-temperature, with a shift from a moderate 57°F (13.9°C) in November to a frosty 49.1°F (9.5°C). An average low-temperature of 34.3°F (1.3°C) is expected during December.Humidity
The months with the highest humidity are February and December, with an average relative humidity of 78%.Rainfall
In Cosby, during December, the rain falls for 11.5 days and regularly aggregates up to 2.64" (67mm) of precipitation. Throughout the year, there are 155.9 rainfall days, and 24.02" (610mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. 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 December, sunrise is at 7:25 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:29 pm EST.
Sunshine
In Cosby, the average sunshine in December is 5.6h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December?
When does it snow the most?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Cosby have in December?
When are sunrise and sunset in December in Cosby?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index intensity in December?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Cosby, Tennessee, USA
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