December weather forecastBlythewood, SC
December
Weather in December
December signifies the full swing of winter in Blythewood. Temperatures drop further from November, ranging from 40.6°F (4.8°C) to 54.9°F (12.7°C). The transition from November to December brings shorter daylight hours and a significant increase in rainfall, along with decreased winds from the previous month. However, the vibrant holiday spirit makes the city gleam with lights and festivities making December a charming and exciting time to visit. The possibility of light snowfall adds a festive touch to the winter atmosphere in Blythewood.Temperature
Blythewood's weather in December involves a mild decrease in the average high-temperature, moving down slightly from November's refreshing 61.7°F (16.5°C) to a fresh 54.9°F (12.7°C). During December, the temperature is averaged to a low of 40.6°F (4.8°C) at night.Humidity
The months with the highest humidity are May and December, with an average relative humidity of 75%.Rainfall
The month with the most rainfall in Blythewood is December, when the rain falls for 12 days and typically aggregates up to 3.5" (89mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Blythewood, South Carolina, during December, snow falls for 0.2 days and regularly aggregates up to 0.08" (2mm) of snow. In Blythewood, 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 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:12 am and sunset at 5:14 pm. On the last day of December, sunrise is at 7:29 am and sunset at 5:24 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 of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 3 during December leads to these advisories:
Ensure safety - Sun damage prevention is strongly urged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Experience reduced UV exposure by about half when donning a wide-brim hat. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in December /
Average sunshine in December
Blythewood, SC
- Average daylight in December: 9h and 54min
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 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).
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).
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).
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).
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).
