December weather forecast
Trinity, SC

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Weather in December

The first month of the winter, December, is also a fresh month in Trinity, South Carolina, with temperature in the range of an average high of 54.9°F (12.7°C) and an average low of 39.7°F (4.3°C).

Temperature

The average high-temperature slightly decreases in December, shifting from a refreshing 61.7°F (16.5°C) in November to a fresh 54.9°F (12.7°C). During December nights, Trinity witnesses a consistent average temperature of 39.7°F (4.3°C).

Humidity

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

Rainfall

December is the month with the most rainfall. Rain falls for 11.3 days and accumulates 3.15" (80mm) of precipitation.

Snowfall

Months with snowfall in Trinity are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 1.5 snowfall days, and 1.18" (30mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 54min of daylight.
On the first day of the month, sunrise is at 7:15 am and sunset at 5:17 pm. On the last day of December, sunrise is at 7:32 am and sunset at 5:27 pm EST.

Sunshine

The month with the least sunshine is December, with an average of 5.4h of sunshine.

UV index

The average daily maximum UV index in December is 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: In December, the maximum UV index of 3 suggests these recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Updated: Aug 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in December?

Trinity in December has an average high-temperature of 54.9°F (12.7°C) and an average low-temperature of 39.7°F (4.3°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in September is estimated at 93.2°F (34°C).

What is the most humid month?

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

What is the average humidity in December?

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

What is the wettest month?

The month with the most rainfall is December, when the rain falls for 11.3 days and typically aggregates up to 3.15" (80mm) of precipitation.

How much does it rain in December?

In Trinity, in December, it is raining for 11.3 days, with typically 3.15" (80mm) of accumulated precipitation.

When does it start snowing?

December is the first month it typically snows. Throughout December, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days in Trinity?

December has the shortest days of the year, with an average of 9h and 54min of daylight.

How many hours of daylight does Trinity have in December?

The average day length in December is 9h and 55min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:15 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:27 pm EST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.4h of sunshine.

How many hours of sunshine does Trinity have in December?

In Trinity, the average sunshine duration in December is 5.4h.

What is the UV index reading in December?

In December, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
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
Trinity, SC

Average temperature in December - Trinity, SC
  • Average high temperature in December: 54.9°F

The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (51.4°F).

  • Average low temperature in December: 39.7°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).

Average pressure in December
Trinity, SC

Average pressure in December - Trinity, SC
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in December
Trinity, SC

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

The windiest months (with the highest average wind speed) are February and April (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in December
Trinity, SC

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

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).

Average rainfall in December
Trinity, SC

Average rainfall in December - Trinity, SC
  • Average rainfall in December: 3.15"

The wettest month (with the highest rainfall) is December (3.15").
The driest month (with the least rainfall) is September (1.42").

Average rainfall days in December
Trinity, SC

Average rainfall days in December - Trinity, SC
  • Average rainfall days in December: 11.3 days

The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is November (8.1 days).

Average snowfall in December
Trinity, SC

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

The month with the highest snowfall is February (0.75").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Trinity, SC

Average snowfall days in December - Trinity, 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, October and November (0 days).

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

Average daylight in December / Average sunshine in December - Trinity, 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 54min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

Average sunshine days in December
Trinity, SC

Average sunshine days in December - Trinity, SC
  • Average sunshine days in December: 18.6 days

The month with the most sunshine days is October (21.8 days).
The month with the least sunshine days is July (11.2 days).

Average UV index in December
Trinity, SC

Average UV index in December - Trinity, SC
  • Average UV index in December: 3

The months with the highest UV index are June and August (UV index 7).
The month with the lowest UV index is January (UV index 2).

Average cloud cover in December
Trinity, SC

Average cloud cover in December - Trinity, 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 June (Cloud cover 28).

Average visibility in December
Trinity, SC

Average visibility in December - Trinity, 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).

Trinity, South Carolina, USA

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