December weather forecast
Westminster, SC

Weather in December

December, the first month of the winter in Westminster, is still a cool month, with an average temperature varying between 37.9°F (3.3°C) and 52.7°F (11.5°C).

Temperature

In Westminster, the average high-temperature in December marginally drops from a mild 59.5°F (15.3°C) in November to a fresh 52.7°F (11.5°C). The average low-temperature, in December, is 37.9°F (3.3°C).

Humidity

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

Rainfall

The month with the most rainfall is December, when the rain falls for 11.6 days and typically aggregates up to 3.7" (94mm) of precipitation.

Snowfall

January through March and December are months with snowfall in Westminster, South Carolina. The month with the most snowfall is December, when snow falls for 0.6 days and typically aggregates up to 2.28" (58mm) of snow.

Daylight

With an average of 9h and 53min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:21 am and sunset at 5:21 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 5:31 pm EST.

Sunshine

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

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the most humid month in Westminster?

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

What is the average humidity in December in Westminster?

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

What is the rainiest month in Westminster?

December is the month with the most rainfall in Westminster, South Carolina. Rain falls for 11.6 days and accumulates 3.7" (94mm) of precipitation.

How many days does it rain in December in Westminster?

In December, the rain falls for 11.6 days. Throughout December, 3.7" (94mm) of precipitation is accumulated.

When does it snow the most in Westminster?

The month with the most snowfall is December, when snow falls for 0.6 days and typically aggregates up to 2.28" (58mm) of snow.

When does it start snowing in Westminster?

December is the first month it typically snows. Throughout December, in the average 0.6 snowfall days, it receives 2.28" (58mm) of snow.

What is the month with the shortest days in Westminster?

December has the shortest days of the year in Westminster, with an average of 9h and 53min of daylight.

How many hours of daylight does Westminster have in December?

In December, the average day length in Westminster, South Carolina, is 9h and 53min.

When is the sunrise / sunset in December in Westminster?

In December, on the first day of the month, sunrise is at 7:21 am and sunset at 5:21 pm. On the last day of the month, in Westminster, sunrise is at 7:39 am and sunset at 5:31 pm EST.

What is the month with the least sunshine in Westminster?

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

How many hours of sunshine does Westminster have in December?

In Westminster, South Carolina, the average sunshine duration in December is 5.4h.

What is the month with the lowest UV index in Westminster?

The months with the lowest UV index are January and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Westminster?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in December
Westminster, SC

Average temperature in December - Westminster, SC
  • Average high temperature in December: 52.7°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (48.7°F).

  • Average low temperature in December: 37.9°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).

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Average pressure in December
Westminster, SC

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

The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

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Average wind speed in December
Westminster, SC

Average wind speed in December - Westminster, SC
  • Average wind speed in December: 5.4mph

The windiest month (with the highest average wind speed) is February (6.1mph).
The calmest month (with the lowest average wind speed) is August (4mph).

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Average humidity in December
Westminster, SC

Average humidity in December - Westminster, 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 (71%).

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Average rainfall in December
Westminster, SC

Average rainfall in December - Westminster, SC
  • Average rainfall in December: 3.7"

The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is September (1.77").

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Average rainfall days in December
Westminster, SC

Average rainfall days in December - Westminster, SC
  • Average rainfall days in December: 11.6 days

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is October (8.5 days).

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Average snowfall in December
Westminster, SC

Average snowfall in December - Westminster, SC
  • Average snowfall in December: 2.28"

The month with the highest snowfall is December (2.28").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Westminster, SC

Average snowfall days in December - Westminster, SC
  • Average snowfall days in December: 0.6 days

The month with the highest number of snowfall days is February (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Westminster, SC
  • Average daylight in December: 9h and 53min

The month with the longest days is June (Average daylight: 14h and 26min).
The month with the shortest days is December (Average daylight: 9h and 53min).

  • Average sunshine in December: 5.4h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 5.4h).

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Average sunshine days in December
Westminster, SC

Average sunshine days in December - Westminster, SC
  • Average sunshine days in December: 17.6 days

The month with the most sunshine days is October (21.4 days).
The month with the least sunshine days is July (11.6 days).

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Average UV index in December
Westminster, SC

Average UV index in December - Westminster, SC
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in December
Westminster, SC

Average cloud cover in December - Westminster, 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 July (Cloud cover 27).

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Average visibility in December
Westminster, SC

Average visibility in December - Westminster, 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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