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 advent of December brings a subtle shift in temperature, with the average high moving from a refreshing 57.4°F (14.1°C) in November to a frosty 49.1°F (9.5°C). Harpeth Hills records an average nighttime low-temperature of 36°F (2.2°C) throughout December.Humidity
December is the most humid month in Harpeth Hills, Tennessee, with an average relative humidity of 79%.Rainfall
In December, in Harpeth Hills, Tennessee, the rain falls for 12.7 days. Throughout December, 3.11" (79mm) of precipitation is accumulated. Throughout the year, there are 176.6 rainfall days, and 38.94" (989mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Harpeth Hills, in December, snow falls for 2.2 days, with typically accumulated 0.47" (12mm) of snow. Throughout the year, there are 11.4 snowfall days, and 3.35" (85mm) of snow is accumulated.Daylight
December has the shortest days of the year in Harpeth Hills, with an average of 9h and 48min of daylight.On the first day of December in Harpeth Hills, sunrise is at 6:40 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 4:43 pm CST.
Sunshine
In Harpeth Hills, the average sunshine in December is 4.7h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Harpeth Hills. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. 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. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Harpeth Hills?
What is the most humid month in Harpeth Hills?
What is the average humidity in December in Harpeth Hills?
How many days does it rain in December in Harpeth Hills?
How much does it snow in Harpeth Hills in December?
What is the month with the shortest days in Harpeth Hills?
How many hours of daylight does Harpeth Hills have in December?
When are sunrise and sunset in December in Harpeth Hills?
How long on average sun shines in December in Harpeth Hills?
What is the month with the lowest UV index in Harpeth Hills?
What is the UV index reading in December in Harpeth Hills?
Average temperature in December
Harpeth Hills, TN
- Average high temperature in December: 49.1°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in December: 36°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).
Average pressure in December
Harpeth Hills, 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 (29.97"Hg).
Average wind speed in December
Harpeth Hills, TN
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is February (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.6mph).
Average humidity in December
Harpeth Hills, TN
- Average humidity in December: 79%
The month with the highest relative humidity is December (79%).
The months with the lowest relative humidity are October and November (74%).
Average rainfall in December
Harpeth Hills, TN
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is July (4.37").
The driest months (with the least rainfall) are September and November (2.36").
Average rainfall days in December
Harpeth Hills, TN
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is July (20.3 days).
The month with the least rainy days is November (10 days).
Average snowfall in December
Harpeth Hills, TN
- Average snowfall in December: 0.47"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Harpeth Hills, TN
- Average snowfall days in December: 2.2 days
The month with the highest number of snowfall days is February (3.9 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
Harpeth Hills, TN
- Average daylight in December: 9h and 5min
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: 4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Harpeth Hills, TN
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is July (9.2 days).
Average UV index in December
Harpeth Hills, 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
Harpeth Hills, TN
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in December
Harpeth Hills, 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).
Harpeth Hills, Tennessee, USA
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