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
A modest decline in the average high-temperature is seen during December, decreasing from a refreshing 62.4°F (16.9°C) in November to a moderate 56.3°F (13.5°C). Sumter Junction experiences a nighttime temperature average of 42.3°F (5.7°C) during December.Humidity
In December, the average relative humidity is 74%.Rainfall
The month with the most rainfall is December, when the rain falls for 11 days and typically aggregates up to 3.58" (91mm) of precipitation.Snowfall
Months with snowfall in Sumter Junction, South Carolina, are January through March, November and December. In December, it is snowing for 0.1 days. Throughout December, 0.16" (4mm) of snow is accumulated. Throughout the year, in Sumter Junction, there are 1.3 snowfall days, and 1.06" (27mm) of snow is accumulated.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year in Sumter Junction.On the first day of the month, sunrise is at 7:09 am and sunset at 5:13 pm. On the last day of December, in Sumter Junction, sunrise is at 7:27 am and sunset at 5:24 pm EST.
Sunshine
With an average of 5.3h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 3 in December, converts into the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What is the temperature in December in Sumter Junction?
What is the average humidity in December in Sumter Junction?
What is the wettest month in Sumter Junction?
How much does it rain in Sumter Junction in December?
How much does it snow in Sumter Junction in December?
What is the month with the shortest days in Sumter Junction?
How many hours of daylight does Sumter Junction have in December?
When is the sunrise / sunset in December in Sumter Junction?
What is the month with the least sunshine in Sumter Junction?
How many hours of sunshine does Sumter Junction have in December?
What are the months with the lowest UV index in Sumter Junction?
What is the UV index reading in December in Sumter Junction?
Average temperature in December
Sumter Junction, SC
- Average high temperature in December: 56.3°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (52.9°F).
- Average low temperature in December: 42.3°F
The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (38.1°F).
Average pressure in December
Sumter Junction, 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
Sumter Junction, SC
- Average wind speed in December: 7.5mph
The windiest months (with the highest average wind speed) are February and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Sumter Junction, SC
- Average humidity in December: 74%
The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are January and November (70%).
Average rainfall in December
Sumter Junction, SC
- Average rainfall in December: 3.58"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is January (1.89").
Average rainfall days in December
Sumter Junction, SC
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is October (8.5 days).
Average snowfall in December
Sumter Junction, SC
- Average snowfall in December: 0.16"
The month with the highest snowfall is February (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Sumter Junction, SC
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.6 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
Sumter Junction, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Sumter Junction, SC
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in December
Sumter Junction, SC
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in December
Sumter Junction, SC
- Average cloud cover in December: 42
The months with the most cloud cover are February and December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in December
Sumter Junction, 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).
Sumter Junction, South Carolina, USA
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