December weather forecast
Swansea, SC

englishespañol中文
Share

Weather in December

The first month of the winter, December, is still a mild month in Swansea, South Carolina, with an average temperature ranging between min 42.4°F (5.8°C) and max 57°F (13.9°C).

Temperature

December signifies a minor drop in average high-temperature, transitioning from an enjoyable 62.6°F (17°C) in November to a mild 57°F (13.9°C). An average low-temperature of 42.4°F (5.8°C) is anticipated throughout the nights in Swansea during December.

Humidity

The most humid month in Swansea is December, with an average relative humidity of 75%.

Rainfall

December is the month with the most rainfall. Rain falls for 11.9 days and accumulates 3.86" (98mm) of precipitation.

Snowfall

Months with snowfall 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 0.16" (4mm) of snow. Throughout the year, there are 1.6 snowfall days, and 0.83" (21mm) of snow is accumulated.

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 7:11 am and sunset at 5:15 pm. On the last day of December, in Swansea, sunrise is at 7:29 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, February and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index, 3 during December, leads to the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Boost your sun resistance with garments that are densely woven yet spacious. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.

Frequently asked questions

What are December temperatures in Swansea?

The high-temperature in Swansea, South Carolina, during December is 57°F (13.9°C) and the low-temperature is 42.4°F (5.8°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is estimated at 91.4°F (33°C).

What is the most humid month in Swansea?

The most humid month in Swansea, South Carolina, is December, with an average relative humidity of 75%.

What is the average humidity in December in Swansea?

The average relative humidity in December in Swansea, South Carolina, is 75%.

What is the rainiest month in Swansea?

December is the month with the most rainfall in Swansea. Rain falls for 11.9 days and accumulates 3.86" (98mm) of precipitation.

How many days does it rain in December in Swansea?

In December, in Swansea, South Carolina, the rain falls for 11.9 days. Throughout December, 3.86" (98mm) of precipitation is accumulated.

When does it start snowing in Swansea?

December is the first month it typically snows in Swansea. Throughout December, in the average 0.1 snowfall days, it receives 0.16" (4mm) of snow.

What is the month with the shortest days in Swansea?

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

How many hours of daylight does Swansea have in December?

The average day length in December in Swansea, South Carolina, is 9h and 58min.

When is the sunrise / sunset in December in Swansea?

In December, on the first day of the month, sunrise is at 7:11 am and sunset at 5:15 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:26 pm EST.

What is the month with the least sunshine in Swansea?

With an average of 5.5h of sunshine, December has the least sunshine of the year in Swansea, South Carolina.

How many hours of sunshine does Swansea have in December?

In December, the average sunshine duration in Swansea, South Carolina, is 5.5h.

What are the months with the lowest UV index in Swansea?

The months with the lowest UV index in Swansea are January, February and December, with an average maximum UV index of 3.

What is the UV index reading in December in Swansea?

In Swansea, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium health risk 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
Swansea, SC

Average temperature in December - Swansea, SC
  • Average high temperature in December: 57°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (53.2°F).

  • Average low temperature in December: 42.4°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (38.1°F).

Average pressure in December
Swansea, SC

Average pressure in December - Swansea, 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
Swansea, SC

Average wind speed in December - Swansea, SC
  • Average wind speed in December: 7.5mph

The windiest months (with the highest average wind speed) are February, March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

Average humidity in December
Swansea, SC

Average humidity in December - Swansea, SC
  • Average humidity in December: 75%

The month with the highest relative humidity is December (75%).
The months with the lowest relative humidity are January and November (70%).

Average rainfall in December
Swansea, SC

Average rainfall in December - Swansea, SC
  • Average rainfall in December: 3.86"

The wettest month (with the highest rainfall) is December (3.86").
The driest months (with the least rainfall) are September and November (2.01").

Average rainfall days in December
Swansea, SC

Average rainfall days in December - Swansea, SC
  • Average rainfall days in December: 11.9 days

The month with the highest number of rainy days is July (19.9 days).
The months with the least rainy days are October and November (9 days).

Average snowfall in December
Swansea, SC

Average snowfall in December - Swansea, SC
  • Average snowfall in December: 0.16"

The months with the highest snowfall are January and February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Swansea, SC

Average snowfall days in December - Swansea, SC
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is January (0.7 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
Swansea, SC

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

The month with the longest days is June (Average daylight: 14h and 24min).
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).

Average sunshine days in December
Swansea, SC

Average sunshine days in December - Swansea, SC
  • Average sunshine days in December: 17.3 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (8.4 days).

Average UV index in December
Swansea, SC

Average UV index in December - Swansea, 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
Swansea, SC

Average cloud cover in December - Swansea, 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 28).

Average visibility in December
Swansea, SC

Average visibility in December - Swansea, 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).

Swansea, South Carolina, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location