December weather forecastHiara Heights, TN
December
Weather in December
The first month of the winter, December, is also a frosty month in Hiara Heights, Tennessee, with an average temperature fluctuating between 47.3°F (8.5°C) and 32.9°F (0.5°C).Temperature
December brings a slight decrease in the average high-temperature, shifting from a moderate 55.9°F (13.3°C) in November to a frosty 47.3°F (8.5°C). Throughout December, the nighttime temperature averages to a cold 32.9°F (0.5°C).Humidity
In Hiara Heights, the average relative humidity in December is 78%.Rainfall
In Hiara Heights, Tennessee, during December, the rain falls for 10.9 days and regularly aggregates up to 2.17" (55mm) of precipitation. In Hiara Heights, during the entire year, the rain falls for 147.1 days and collects up to 23.46" (596mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Hiara Heights, in December, snow falls for 2.7 days, with typically accumulated 1.38" (35mm) of snow. Throughout the year, there are 16.7 snowfall days, and 5.35" (136mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of the month, sunrise is at 7:24 am and sunset at 5:14 pm. On the last day of December, in Hiara Heights, sunrise is at 7:42 am and sunset at 5:25 pm EST.
Sunshine
The average sunshine in December in Hiara Heights, Tennessee, is 5.3h.UV index
The months with the lowest UV index in Hiara Heights are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Hiara Heights, TN
- Average high temperature in December: 47.3°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (42.4°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure in December
Hiara Heights, TN
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in December
Hiara Heights, TN
- Average wind speed in December: 5.6mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Hiara Heights, TN
- Average humidity in December: 78%
The month with the highest relative humidity is February (79%).
The months with the lowest relative humidity are July, August, September and November (74%).
Average rainfall in December
Hiara Heights, TN
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is February (3.03").
The driest month (with the least rainfall) is September (0.98").
Average rainfall days in December
Hiara Heights, TN
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is November (8 days).
Average snowfall in December
Hiara Heights, TN
- Average snowfall in December: 1.38"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Hiara Heights, TN
- Average snowfall days in December: 2.7 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, September and October (0 days).
Average daylight in December /
Average sunshine in December
Hiara Heights, TN
- Average daylight in December: 9h and 42min
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: 5h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Hiara Heights, TN
- Average sunshine days in December: 16.6 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in December
Hiara Heights, 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
Hiara Heights, TN
- Average cloud cover in December: 48
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Hiara Heights, TN
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
