December weather forecast
Otranto, SC

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Weather in December

The first month of the winter, December, is still a refreshing month in Otranto, South Carolina, with an average temperature varying between 45.9°F (7.7°C) and 60.6°F (15.9°C).

Temperature

A minor decrease in the average high-temperature is observed during December, shifting from an enjoyable 66.2°F (19°C) in November to a moderate 60.6°F (15.9°C). In December, Otranto experiences a temperature dip to an average of 45.9°F (7.7°C) at night.

Humidity

The most humid month is December, with an average relative humidity of 77%.

Rainfall

In Otranto, in December, during 10.8 rainfall days, 4.17" (106mm) of precipitation is typically accumulated. In Otranto, during the entire year, the rain falls for 172.6 days and collects up to 39.13" (994mm) of precipitation.

Snowfall

Months with snowfall are January, February and December. December is the first month it typically snows. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Otranto, South Carolina, during the entire year, snow falls for 0.9 days and aggregates up to 0.39" (10mm) of snow.

Daylight

With an average of 10h and 0min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:05 am and sunset at 5:13 pm. On the last day of December, sunrise is at 7:22 am and sunset at 5:24 pm EST.

Sunshine

With an average of 5.6h of sunshine, December has the least sunshine of the year.

UV index

In December, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 4 during December leads to these instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Updated: Aug 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Otranto in December?

In Otranto, 60.6°F (15.9°C) is the average high-temperature and 45.9°F (7.7°C) is the average low-temperature during December. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in September is calculated to be 95°F (35°C).

What is the most humid month?

December is the most humid month, with an average relative humidity of 77%.

What is the average humidity in December?

The average relative humidity in December is 77%.

How many days does it rain in December?

In Otranto, during December, the rain falls for 10.8 days and regularly aggregates up to 4.17" (106mm) of precipitation.

When does it start snowing in Otranto?

December is the first month it typically snows in Otranto. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 10h and 0min of daylight.

What is the average length of the day in December?

The average day length in December is 10h and 1min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:05 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:24 pm EST.

What is the month with the least sunshine in Otranto?

December has the least sunshine of the year, with an average of 5.6h of sunshine.

How long on average sun shines in December in Otranto?

In Otranto, the average sunshine duration in December is 5.6h.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 4. 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
Otranto, SC

Average temperature in December - Otranto, SC
  • Average high temperature in December: 60.6°F

The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (56.8°F).

  • Average low temperature in December: 45.9°F

The month with the highest average low temperature is July (75.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

Average pressure in December
Otranto, SC

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).

Average wind speed in December
Otranto, SC

Average wind speed in December - Otranto, SC
  • Average wind speed in December: 6.9mph

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

Average humidity in December
Otranto, SC

Average humidity in December - Otranto, SC
  • Average humidity in December: 77%

The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January and March (72%).

Average rainfall in December
Otranto, SC

Average rainfall in December - Otranto, SC
  • Average rainfall in December: 4.17"

The wettest month (with the highest rainfall) is August (6.22").
The driest month (with the least rainfall) is January (1.46").

Average rainfall days in December
Otranto, SC

Average rainfall days in December - Otranto, SC
  • Average rainfall days in December: 10.8 days

The month with the highest number of rainy days is August (23.4 days).
The month with the least rainy days is November (8.2 days).

Average snowfall in December
Otranto, SC

Average snowfall in December - Otranto, SC
  • Average snowfall in December: 0.04"

The month with the highest snowfall is February (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Otranto, SC

Average snowfall days in December - Otranto, SC
  • Average snowfall days in December: 0.2 days

The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight in December /
Average sunshine in December
Otranto, SC

Average daylight in December / Average sunshine in December - Otranto, 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 4min

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 36min).

Average sunshine days in December
Otranto, SC

Average sunshine days in December - Otranto, SC
  • Average sunshine days in December: 19.1 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is August (5.8 days).

Average UV index in December
Otranto, SC

Average UV index in December - Otranto, SC
  • Average UV index in December: 4

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

Average cloud cover in December
Otranto, SC

Average cloud cover in December - Otranto, SC
  • Average cloud cover in December: 41

The month with the most cloud cover is December (Cloud cover 41).
The months with the least cloud cover are June and July (Cloud cover 27).

Average visibility in December
Otranto, SC

Average visibility in December - Otranto, 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).

Otranto, South Carolina, USA

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