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 ushers in a minute temperature change, with average high-temperatures reducing from November's mild 56.3°F (13.5°C) to a frosty 47.5°F (8.6°C). Nighttime temperature experiences an average drop to an icy 34.7°F (1.5°C) in December.Humidity
February, March, May, July and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In Castalian Springs, Tennessee, in December, it is raining for 12.8 days, with typically 2.99" (76mm) of accumulated precipitation. Throughout the year, there are 176.5 rainfall days, and 41.22" (1047mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 3.5 days. Throughout December, 0.87" (22mm) of snow is accumulated. In Castalian Springs, Tennessee, during the entire year, snow falls for 17.5 days and aggregates up to 5" (127mm) of snow.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:38 am and sunset at 4:30 pm. On the last day of December, in Castalian Springs, sunrise is at 6:56 am and sunset at 4:40 pm CST.
Sunshine
In December, the average sunshine in Castalian Springs is 4.4h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Castalian Springs. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Castalian Springs in December?
What is the most humid month in Castalian Springs?
What is the average humidity in December in Castalian Springs?
How much does it rain in Castalian Springs in December?
How much does it snow in Castalian Springs in December?
What is the month with the shortest days in Castalian Springs?
What is the average length of the day in December in Castalian Springs?
What time are sunrise and sunset in December in Castalian Springs?
How long on average sun shines in December in Castalian Springs?
What are the months with the lowest UV index in Castalian Springs?
How high is the UV index in December in Castalian Springs?
Average temperature in December
Castalian Springs, TN
- Average high temperature in December: 47.5°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (42.8°F).
- Average low temperature in December: 34.7°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (28.9°F).
Average pressure in December
Castalian Springs, TN
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Castalian Springs, TN
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is February (8.2mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).
Average humidity in December
Castalian Springs, TN
- Average humidity in December: 79%
The months with the highest relative humidity are February, March, May, July and December (79%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Castalian Springs, TN
- Average rainfall in December: 2.99"
The wettest month (with the highest rainfall) is July (5.2").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days in December
Castalian Springs, TN
- Average rainfall days in December: 12.8 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is November (10.3 days).
Average snowfall in December
Castalian Springs, TN
- Average snowfall in December: 0.87"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Castalian Springs, TN
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (5.2 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
Castalian Springs, TN
- Average daylight in December: 9h and 4min
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 42min).
- Average sunshine in December: 4h and 2min
The months with the most sunshine are June and August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
Castalian Springs, TN
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in December
Castalian Springs, 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
Castalian Springs, TN
- Average cloud cover in December: 54
The month with the most cloud cover is February (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in December
Castalian Springs, TN
- Average visibility in December: 6mi
The months with the highest visibility are February, April, June, September, October, November and December (6mi).
The months with the lowest visibility are January, March, May, July and August (5mi).
Castalian Springs, Tennessee, USA
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