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
As December commences, the average high-temperature subtly reduces, transitioning from a comfortable 61.7°F (16.5°C) in November to a moderate 55.6°F (13.1°C). During the month of December, an average temperature of 41°F (5°C) is noted during the nights.Humidity
In Hartsville, the average relative humidity in December is 75%.Rainfall
In Hartsville, in December, during 11.2 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. In Hartsville, during the entire year, the rain falls for 154 days and collects up to 30.51" (775mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Hartsville, during December, snow falls for 0.1 days and regularly aggregates up to 0.2" (5mm) of snow. Throughout the year, there are 1.4 snowfall days, and 1.57" (40mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 7:08 am and sunset at 5:10 pm. On the last day of December, sunrise is at 7:26 am and sunset at 5:20 pm EST.
Sunshine
The months with the least sunshine are January and December, with an average of 5.5h of sunshine.UV index
In Hartsville, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 3 in December translates into these instructions:
Exercise prevention - Warding off sunburn is urged. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Hartsville in December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in Hartsville 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?
What are the months with the least sunshine?
How many hours of sunshine does Hartsville have in December?
What is the UV index intensity in December?
Average temperature in December
Hartsville, SC
- Average high temperature in December: 55.6°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (51.8°F).
- Average low temperature in December: 41°F
The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in December
Hartsville, SC
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Hartsville, SC
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Hartsville, SC
- Average humidity in December: 75%
The months with the highest relative humidity are May and September (76%).
The months with the lowest relative humidity are January and November (71%).
Average rainfall in December
Hartsville, SC
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in December
Hartsville, SC
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is October (7.8 days).
Average snowfall in December
Hartsville, SC
- Average snowfall in December: 0.2"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Hartsville, SC
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Hartsville, SC
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in December
Hartsville, SC
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is October (21.9 days).
The month with the least sunshine days is July (11 days).
Average UV index in December
Hartsville, SC
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Hartsville, SC
- Average cloud cover in December: 41
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 29).
Average visibility in December
Hartsville, SC
- 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).
Hartsville, South Carolina, USA
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