December weather forecast
Round O, SC

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Weather in December

The first month of the winter, December, is still a mild month in Round O, South Carolina, with temperature in the range of an average low of 44.1°F (6.7°C) and an average high of 60.1°F (15.6°C).

Temperature

The beginning of December brings a slight decrease in the average high-temperature, transitioning from an enjoyable 65.8°F (18.8°C) in November to a moderate 60.1°F (15.6°C). The average low-temperature in Round O during December nights is a frosty 44.1°F (6.7°C).

Humidity

The months with the highest humidity in Round O, South Carolina, are August and December, with an average relative humidity of 77%.

Rainfall

In Round O, in December, it is raining for 9 days, with typically 1.97" (50mm) of accumulated precipitation. Throughout the year, in Round O, South Carolina, there are 149.7 rainfall days, and 21.5" (546mm) of precipitation is accumulated.

Snowfall

In Round O, snow does not fall in March through December.

Daylight

The month with the shortest days in Round O, South Carolina, is December, with an average of 10h and 0min of daylight.
On the first day of December in Round O, sunrise is at 7:07 am and sunset at 5:15 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:26 pm EST.

Sunshine

The month with the least sunshine is December, with an average of 5.5h of sunshine.

UV index

January and December, with an average maximum UV index of 3, are months with the lowest UV index in Round O. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 3 during December translates into the following directions:
Guard yourself - Avoiding sunburn is suggested. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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Frequently asked questions

What is the usual temperature for Round O in December?

In December, the average high-temperature and low-temperature in Round O, South Carolina, are 60.1°F (15.6°C) and 44.1°F (6.7°C) respectively. The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is evaluated at 96.8°F (36°C).

What is the most humid month in Round O?

August and December, with an average relative humidity of 77%, are most humid months in Round O.

What is the average humidity in December in Round O?

In December, the average relative humidity in Round O is 77%.

How many days does it rain in December in Round O?

In Round O, in December, it is raining for 9 days, with typically 1.97" (50mm) of accumulated precipitation.

When it does not snow in Round O?

In Round O, snow does not fall in March through December.

Does it snow in Round O in December?

In Round O, South Carolina, in December, it doesn't snow. In January, it regularly snows.

What is the month with the shortest days in Round O?

With an average of 10h and 0min of daylight, December has the shortest days of the year in Round O, South Carolina.

What is the average length of the day in December in Round O?

The average day length in December in Round O, South Carolina, is 10h and 1min.

When is the sunrise / sunset in December in Round O?

On the first day of December in Round O, South Carolina, sunrise is at 7:07 am and sunset at 5:15 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:26 pm EST.

What is the month with the least sunshine in Round O?

The month with the least sunshine in Round O, South Carolina, is December, with an average of 5.5h of sunshine.

How many hours of sunshine does Round O have in December?

In December, the average sunshine duration is 5.5h.

What is the month with the lowest UV index in Round O?

January and December, with an average maximum UV index of 3, are months with the lowest UV index in Round O, South Carolina.

What is the UV index reading in December in Round O?

In Round O, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Round O, SC

Average temperature in December - Round O, SC
  • Average high temperature in December: 60.1°F

The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (56.1°F).

  • Average low temperature in December: 44.1°F

The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (39.9°F).

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Average pressure in December
Round O, SC

Average pressure in December - Round O, SC
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

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Average wind speed in December
Round O, SC

Average wind speed in December - Round O, SC
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Round O, SC

Average humidity in December - Round O, SC
  • Average humidity in December: 77%

The months with the highest relative humidity are August and December (77%).
The months with the lowest relative humidity are January, March and November (72%).

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Average rainfall in December
Round O, SC

Average rainfall in December - Round O, SC
  • Average rainfall in December: 1.97"

The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is November (0.75").

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Average rainfall days in December
Round O, SC

Average rainfall days in December - Round O, SC
  • Average rainfall days in December: 9 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is November (6.2 days).

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Average snowfall in December
Round O, SC

Average snowfall in December - Round O, SC
  • Average snowfall in December: 0"

The months with the highest snowfall are January and February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in December
Round O, SC

Average snowfall days in December - Round O, SC
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in December /
Average sunshine in December
Round O, SC

Average daylight in December / Average sunshine in December - Round O, SC
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 5h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in December
Round O, SC

Average sunshine days in December - Round O, SC
  • Average sunshine days in December: 19.8 days

The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is July (6.9 days).

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Average UV index in December
Round O, SC

Average UV index in December - Round O, SC
  • Average UV index in December: 3

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

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Average cloud cover in December
Round O, SC

Average cloud cover in December - Round O, SC
  • Average cloud cover in December: 42

The month with the most cloud cover is December (Cloud cover 42).
The months with the least cloud cover are July and October (Cloud cover 29).

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Average visibility in December
Round O, SC

Average visibility in December - Round O, SC
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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Round O, South Carolina, USA

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