December weather forecastHarbour, TN
December
Weather in December
December, the first month of the winter in Harbour, is still a chilly month, with an average temperature ranging between min 33.3°F (0.7°C) and max 47.3°F (8.5°C).Temperature
In the transition to December, Harbour observes a minor drop in the average high-temperature, shifting from a refreshing 55.6°F (13.1°C) in November to a frosty 47.3°F (8.5°C). The mean low-temperature during December nights is a cold 33.3°F (0.7°C).Humidity
February and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In Harbour, in December, during 11.5 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In Harbour, Tennessee, during the entire year, the rain falls for 147.7 days and collects up to 23.94" (608mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 3 days. Throughout December, 0.98" (25mm) of snow is accumulated. In Harbour, during the entire year, snow falls for 18.6 days and aggregates up to 5.12" (130mm) of snow.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year in Harbour.On the first day of the month, sunrise is at 7:24 am and sunset at 5:15 pm. On the last day of December, sunrise is at 7:42 am and sunset at 5:25 pm EST.
Sunshine
The average sunshine in December is 5.2h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Harbour, TN
- Average high temperature in December: 47.3°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (42.4°F).
- Average low temperature in December: 33.3°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
Harbour, 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
Harbour, TN
- Average wind speed in December: 5.5mph
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
Harbour, TN
- Average humidity in December: 79%
The months with the highest relative humidity are February and December (79%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall in December
Harbour, TN
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is February (3.15").
The driest month (with the least rainfall) is September (1.02").
Average rainfall days in December
Harbour, TN
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in December
Harbour, TN
- Average snowfall in December: 0.98"
The months with the highest snowfall are January and February (1.65").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Harbour, TN
- Average snowfall days in December: 3 days
The month with the highest number of snowfall days is January (5.9 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
Harbour, 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 12min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Harbour, TN
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is June (12.8 days).
Average UV index in December
Harbour, 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
Harbour, TN
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Harbour, TN
- Average visibility in December: 6mi
The months with the highest visibility are March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and May (5mi).
