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
In Hartsville, the average high-temperature in December slightly decreases from a mild 56.3°F (13.5°C) in November to a chilly 47.8°F (8.8°C). In Hartsville, an average nighttime temperature of 35.1°F (1.7°C) is expected during December.Humidity
The months with the highest humidity are February, March, May and December, with an average relative humidity of 79%.Rainfall
In Hartsville, in December, during 13.4 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. In Hartsville, during the entire year, the rain falls for 178.1 days and collects up to 37.99" (965mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 3.1 days. Throughout December, 0.59" (15mm) of snow is accumulated. Throughout the year, there are 17.2 snowfall days, and 4.25" (108mm) of snow is accumulated.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 4:29 pm. On the last day of December, sunrise is at 6:56 am and sunset at 4:39 pm CST.
Sunshine
The average sunshine in December is 4.5h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What are the most humid months?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Hartsville, TN
- Average high temperature in December: 47.8°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (43.7°F).
- Average low temperature in December: 35.1°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in December
Hartsville, 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 (29.97"Hg).
Average wind speed in December
Hartsville, TN
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is February (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity in December
Hartsville, TN
- Average humidity in December: 79%
The months with the highest relative humidity are February, March, May and December (79%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
Hartsville, TN
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is July (4.53").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in December
Hartsville, TN
- Average rainfall days in December: 13.4 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is November (9.7 days).
Average snowfall in December
Hartsville, TN
- Average snowfall in December: 0.59"
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Hartsville, TN
- Average snowfall days in December: 3.1 days
The month with the highest number of snowfall days is January (5.4 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
Hartsville, 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 3min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Hartsville, TN
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in December
Hartsville, 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
Hartsville, TN
- Average cloud cover in December: 53
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in December
Hartsville, 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).
Hartsville, Tennessee, USA
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