December weather forecast
Blythewood, SC

Weather in December

December, the first month of the winter in Blythewood, is still a cool month, with an average temperature fluctuating between 54.9°F (12.7°C) and 40.6°F (4.8°C).

Temperature

In Blythewood, South Carolina, the average high-temperature in December slightly decreases from a comfortable 61.7°F (16.5°C) in November to a fresh 54.9°F (12.7°C). In December, the average low-temperature is 40.6°F (4.8°C).

Humidity

The months with the highest humidity in Blythewood are May and December, with an average relative humidity of 75%.

Rainfall

December is the month with the most rainfall in Blythewood. Rain falls for 12 days and accumulates 3.5" (89mm) of precipitation.

Snowfall

Months with snowfall in Blythewood are January through March, November and December. In Blythewood, in December, snow falls for 0.2 days, with typically accumulated 0.08" (2mm) of snow. In Blythewood, South Carolina, during the entire year, snow falls for 2.5 days and aggregates up to 1.34" (34mm) of snow.

Daylight

With an average of 9h and 55min 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 5:14 pm. On the last day of December, in Blythewood, South Carolina, sunrise is at 7:29 am and sunset at 5:24 pm EST.

Sunshine

With an average of 5.4h of sunshine, December has the least sunshine of the year in Blythewood.

UV index

In Blythewood, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: In December, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Blythewood?

In Blythewood, South Carolina, in December, the average high-temperature is 54.9°F (12.7°C), and the average low-temperature is 40.6°F (4.8°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in September is estimated at 91.4°F (33°C).

What are the most humid months in Blythewood?

May and December, with an average relative humidity of 75%, are most humid months.

What is the average humidity in December in Blythewood?

In December, the average relative humidity is 75%.

What is the rainiest month in Blythewood?

The month with the most rainfall in Blythewood, South Carolina, is December, when the rain falls for 12 days and typically aggregates up to 3.5" (89mm) of precipitation.

How many days does it rain in December in Blythewood?

In Blythewood, South Carolina, during December, the rain falls for 12 days and regularly aggregates up to 3.5" (89mm) of precipitation.

How much does it snow in Blythewood in December?

In Blythewood, South Carolina, in December, during 0.2 snowfall days, 0.08" (2mm) of snow is typically accumulated.

What is the month with the shortest days in Blythewood?

The month with the shortest days in Blythewood is December, with an average of 9h and 55min of daylight.

What is the average length of the day in December in Blythewood?

In Blythewood, South Carolina, the average day length in December is 9h and 55min.

What time are sunrise and sunset in December in Blythewood?

On the first day of December in Blythewood, South Carolina, sunrise is at 7:11 am and sunset at 5:14 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:24 pm EST.

What is the month with the least sunshine in Blythewood?

With an average of 5.4h of sunshine, December has the least sunshine of the year.

How long on average sun shines in December in Blythewood?

The average sunshine duration in December in Blythewood, South Carolina, is 5.4h.

What is the UV index reading in December in Blythewood?

The average daily maximum UV index in December in Blythewood is 3. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Blythewood, SC

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

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is January (51.4°F).

  • Average low temperature in December: 40.6°F

The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).

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Average pressure in December
Blythewood, SC

Average pressure in December - Blythewood, 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).

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Average wind speed in December
Blythewood, SC

Average wind speed in December - Blythewood, SC
  • Average wind speed in December: 7mph

The windiest months (with the highest average wind speed) are February and April (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Blythewood, SC

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

The months with the highest relative humidity are May and December (75%).
The months with the lowest relative humidity are June, July and November (71%).

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Average rainfall in December
Blythewood, SC

Average rainfall in December - Blythewood, SC
  • Average rainfall in December: 3.5"

The wettest month (with the highest rainfall) is December (3.5").
The driest month (with the least rainfall) is September (1.85").

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Average rainfall days in December
Blythewood, SC

Average rainfall days in December - Blythewood, SC
  • Average rainfall days in December: 12 days

The month with the highest number of rainy days is July (18 days).
The months with the least rainy days are October and November (9 days).

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Average snowfall in December
Blythewood, SC

Average snowfall in December - Blythewood, SC
  • Average snowfall in December: 0.08"

The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Blythewood, SC

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

The month with the highest number of snowfall days is February (1.2 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
Blythewood, SC

Average daylight in December / Average sunshine in December - Blythewood, SC
  • Average daylight in December: 9h and 55min

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 55min).

  • Average sunshine in December: 5h and 24min

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).

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Average sunshine days in December
Blythewood, SC

Average sunshine days in December - Blythewood, SC
  • Average sunshine days in December: 17.4 days

The month with the most sunshine days is October (20.9 days).
The month with the least sunshine days is July (10.5 days).

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Average UV index in December
Blythewood, SC

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

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

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Average cloud cover in December
Blythewood, SC

Average cloud cover in December - Blythewood, 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).

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Average visibility in December
Blythewood, SC

Average visibility in December - Blythewood, 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).

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