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
The transition into December involves a small decrease in the average high-temperature, dipping slightly from a moderate 58.1°F (14.5°C) in November to a fresh 50.5°F (10.3°C). Mountainbrook experiences an average temperature drop to an icy 36.1°F (2.3°C) during December nights.Humidity
The most humid month is December, with an average relative humidity of 80%.Rainfall
In Mountainbrook, in December, it is raining for 11.4 days, with typically 2.36" (60mm) of accumulated precipitation. In Mountainbrook, during the entire year, the rain falls for 148 days and collects up to 23.9" (607mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Mountainbrook, during December, snow falls for 0.7 days and regularly aggregates up to 0.24" (6mm) of snow. Throughout the year, there are 5.2 snowfall days, and 1.77" (45mm) of snow is accumulated.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year in Mountainbrook.On the first day of December, sunrise is at 7:30 am and sunset at 5:27 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 5:37 pm EST.
Sunshine
The month with the least sunshine in Mountainbrook, Tennessee, is December, with an average of 5.1h of sunshine.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 2 during December translates into these guidelines:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Mountainbrook?
What is the most humid month in Mountainbrook?
What is the average humidity in December in Mountainbrook?
How many days does it rain in December in Mountainbrook?
How many days does it snow in December in Mountainbrook?
What is the month with the shortest days in Mountainbrook?
What is the average length of the day in December in Mountainbrook?
When is the sunrise / sunset in December in Mountainbrook?
What is the month with the least sunshine in Mountainbrook?
How many hours of sunshine does Mountainbrook have in December?
When is the lowest UV index in Mountainbrook?
What is the UV index intensity in December in Mountainbrook?
Average temperature in December
Mountainbrook, TN
- Average high temperature in December: 50.5°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (46.4°F).
- Average low temperature in December: 36.1°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).
Average pressure in December
Mountainbrook, TN
- Average pressure in December: 30.15"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Mountainbrook, TN
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Mountainbrook, 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, September, October and November (75%).
Average rainfall in December
Mountainbrook, TN
- Average rainfall in December: 2.36"
The wettest month (with the highest rainfall) is July (2.64").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in December
Mountainbrook, TN
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is November (7.3 days).
Average snowfall in December
Mountainbrook, TN
- Average snowfall in December: 0.24"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Mountainbrook, TN
- Average snowfall days in December: 0.7 days
The month with the highest number of snowfall days is February (1.7 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
Mountainbrook, 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: 5h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in December
Mountainbrook, TN
- Average sunshine days in December: 17.7 days
The months with the most sunshine days are October and November (21.2 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in December
Mountainbrook, 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
Mountainbrook, TN
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in December
Mountainbrook, TN
- Average visibility in December: 5mi
The months with the highest visibility are February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, May and December (5mi).
Mountainbrook, Tennessee, USA
Weather forecast for your location
2. Allow the app to use your location