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
A modest decline in the average high-temperature is seen during December, decreasing from a mild 58.1°F (14.5°C) in November to a frosty 49.8°F (9.9°C). December brings an average low-temperature of 36.7°F (2.6°C) to Summertown.Humidity
The most humid month in Summertown is December, with an average relative humidity of 80%.Rainfall
In Summertown, in December, during 11.8 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Summertown, during the entire year, the rain falls for 165.6 days and collects up to 30.39" (772mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In December, in Summertown, it is snowing for 1 days. Throughout December, 0.08" (2mm) of snow is accumulated. In Summertown, during the entire year, snow falls for 6.8 days and aggregates up to 0.59" (15mm) of snow.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year in Summertown.On the first day of December in Summertown, sunrise is at 6:40 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 4:46 pm CST.
Sunshine
In December, the average sunshine in Summertown, Tennessee, is 4.6h.UV index
With an average maximum UV index of 2, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 2 during December translates into the following guidance:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. To avoid the Sun's strongest rays, limit exposure around the mid-day period. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Caution! The reflection of snow can nearly 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 is the temperature in December in Summertown?
What is the most humid month in Summertown?
What is the average humidity in December in Summertown?
How many days does it rain in December in Summertown?
How much does it snow in Summertown in December?
What is the month with the shortest days in Summertown?
How many hours of daylight does Summertown have in December?
When is the sunrise / sunset in December in Summertown?
How long on average sun shines in December in Summertown?
What is the month with the lowest UV index in Summertown?
What is the UV index intensity in December in Summertown?
Average temperature in December
Summertown, TN
- Average high temperature in December: 49.8°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (45.9°F).
- Average low temperature in December: 36.7°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (31.8°F).
Average pressure in December
Summertown, 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
Summertown, TN
- Average wind speed in December: 8.2mph
The windiest month (with the highest average wind speed) is February (8.7mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).
Average humidity in December
Summertown, 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 (73%).
Average rainfall in December
Summertown, TN
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is February (3.27").
The driest month (with the least rainfall) is November (1.77").
Average rainfall days in December
Summertown, TN
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in December
Summertown, TN
- Average snowfall in December: 0.08"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Summertown, TN
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is February (2.6 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Summertown, 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 30min).
Average sunshine days in December
Summertown, TN
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in December
Summertown, TN
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Summertown, TN
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in December
Summertown, 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).
Summertown, Tennessee, USA
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