December weather forecastRuby Falls, TN
December
Weather in December
December, the first month of the winter in Ruby Falls, is still a cool month, with an average temperature ranging between max 50.2°F (10.1°C) and min 36.3°F (2.4°C).Temperature
The beginning of December brings a slight decrease in the average high-temperature, transitioning from a refreshing 57.6°F (14.2°C) in November to a fresh 50.2°F (10.1°C). Ruby Falls observes an average low-temperature of 36.3°F (2.4°C) during December nights.Humidity
December is the most humid month, with an average relative humidity of 80%.Rainfall
December is the month with the most rainfall. Rain falls for 13.7 days and accumulates 4.37" (111mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Ruby Falls, in December, snow falls for 2.2 days, with typically accumulated 0.59" (15mm) of snow. In Ruby Falls, during the entire year, snow falls for 13.2 days and aggregates up to 4.17" (106mm) of snow.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of December, 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 5:40 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 4.9h of sunshine.UV index
January 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 exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 2 during December leads to these instructions:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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
Ruby Falls, 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).
