December weather forecastChattanooga, TN
December
Weather in December
The last month of the year, December, is marked by a significant shift towards winter. Low temperatures, coupled with the return of snowfall, averaging 0.59" (15mm), marks December as the coldest month in Chattanooga. Despite the chill, the abundance of festive events makes this a vibrant time to visit the city. The weather prepares to cycle back towards the cold and crisp conditions of January.Temperature
As December begins, there is a minor decrease in the average high-temperature, softly falling from a refreshing 57.6°F (14.2°C) in November to a cool 50.2°F (10.1°C). Throughout December, Chattanooga anticipates an average low-temperature of 36.3°F (2.4°C).Humidity
The most humid month is December, with an average relative humidity of 80%.Rainfall
The month with the most rainfall is December, when the rain falls for 13.7 days and typically aggregates up to 4.37" (111mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Chattanooga, during December, snow falls for 2.2 days and regularly aggregates up to 0.59" (15mm) of snow. Throughout the year, there are 13.2 snowfall days, and 4.17" (106mm) 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 Chattanooga, sunrise is at 7:31 am and sunset at 5:29 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 5:39 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 4.9h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Chattanooga, TN
- Average high temperature in December: 50.2°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (46°F).
- Average low temperature in December: 36.3°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in December
Chattanooga, 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 (29.98"Hg).
Average wind speed in December
Chattanooga, TN
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is February (6.4mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Chattanooga, TN
- Average humidity in December: 80%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, July, August, October and November (75%).
Average rainfall in December
Chattanooga, TN
- Average rainfall in December: 4.37"
The wettest month (with the highest rainfall) is December (4.37").
The driest month (with the least rainfall) is September (2.56").
Average rainfall days in December
Chattanooga, TN
- Average rainfall days in December: 13.7 days
The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (9.8 days).
Average snowfall in December
Chattanooga, TN
- Average snowfall in December: 0.59"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Chattanooga, TN
- Average snowfall days in December: 2.2 days
The month with the highest number of snowfall days is January (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Chattanooga, TN
- Average daylight in December: 9h and 48min
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 54min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in December
Chattanooga, TN
- Average sunshine days in December: 15.1 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in December
Chattanooga, 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 and December (UV index 2).
Average cloud cover in December
Chattanooga, TN
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in December
Chattanooga, TN
- Average visibility in December: 5mi
The months with the highest visibility are June, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September and December (5mi).
