December weather forecastJefferson City, TN
December
Weather in December
December, the first month of the winter in Jefferson City, is still a chilly month, with an average temperature fluctuating between 49.6°F (9.8°C) and 34.5°F (1.4°C).Temperature
In Jefferson City, the average high-temperature in December slightly decreases from a moderate 57.4°F (14.1°C) in November to a frosty 49.6°F (9.8°C). In Jefferson City, the average nighttime temperature during December is a wintry 34.5°F (1.4°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 78%.Rainfall
In Jefferson City, Tennessee, in December, during 10.6 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. Throughout the year, in Jefferson City, Tennessee, there are 135.1 rainfall days, and 22.01" (559mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Jefferson City. In December, it is snowing for 2.8 days. Throughout December, 0.71" (18mm) of snow is accumulated. Throughout the year, there are 15.8 snowfall days, and 4.57" (116mm) 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 December in Jefferson City, sunrise is at 7:26 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 5:29 pm EST.
Sunshine
In December, the average sunshine is 5.4h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Jefferson City, Tennessee. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Jefferson City, TN
- Average high temperature in December: 49.6°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (45°F).
- Average low temperature in December: 34.5°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).
Average pressure in December
Jefferson City, TN
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in December
Jefferson City, TN
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Jefferson City, 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 (72%).
Average rainfall in December
Jefferson City, TN
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is February (2.8").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in December
Jefferson City, TN
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is July (13.6 days).
The month with the least rainy days is October (8.5 days).
Average snowfall in December
Jefferson City, TN
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Jefferson City, TN
- Average snowfall days in December: 2.8 days
The month with the highest number of snowfall days is January (4.5 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
Jefferson City, TN
- Average daylight in December: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 5h and 24min
The months with the most sunshine are June and July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in December
Jefferson City, TN
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is October (21.4 days).
The month with the least sunshine days is February (14.4 days).
Average UV index in December
Jefferson City, 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
Jefferson City, TN
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 26).
Average visibility in December
Jefferson City, 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).
