Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The shift from November to December in Summerville, South Carolina, includes a small decrease in the average high-temperature, from a refreshing 66°F (18.9°C) to a mild 60.4°F (15.8°C). In December, Summerville reports a consistent average low-temperature of 44.1°F (6.7°C) during the nights.Humidity
December is the most humid month, with an average relative humidity of 78%.Rainfall
In December, in Summerville, South Carolina, the rain falls for 7.1 days. Throughout December, 1.38" (35mm) of precipitation is accumulated. Throughout the year, in Summerville, there are 120.6 rainfall days, and 11.18" (284mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall in Summerville.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:24 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 5.5h of sunshine.UV index
The months with the lowest UV index in Summerville are January and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Summerville in December?
What is the most humid month in Summerville?
What is the average humidity in December in Summerville?
How much does it rain in Summerville in December?
When it does not snow in Summerville?
Does it snow in Summerville in December?
What is the month with the shortest days in Summerville?
What is the average length of the day in December in Summerville?
When is the sunrise / sunset in December in Summerville?
What is the month with the least sunshine in Summerville?
How long on average sun shines in December in Summerville?
When is the lowest UV index in Summerville?
What is the UV index intensity in December in Summerville?
Average temperature in December
Summerville, SC
- Average high temperature in December: 60.4°F
The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is January (56.8°F).
- Average low temperature in December: 44.1°F
The month with the highest average low temperature is July (74.7°F).
The coldest month (with the lowest average low temperature) is January (40.1°F).
Average pressure in December
Summerville, SC
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Summerville, SC
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Summerville, SC
- Average humidity in December: 78%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (72%).
Average rainfall in December
Summerville, SC
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is August (2.09").
The driest month (with the least rainfall) is January (0.28").
Average rainfall days in December
Summerville, SC
- Average rainfall days in December: 7.1 days
The month with the highest number of rainy days is August (18.3 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in December
Summerville, SC
- Average snowfall in December: 0"
The months with the highest snowfall are January and February (0.04").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Summerville, SC
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Summerville, SC
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
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
Summerville, SC
- Average sunshine days in December: 22.8 days
The month with the most sunshine days is January (23.6 days).
The month with the least sunshine days is August (7.4 days).
Average UV index in December
Summerville, SC
- Average UV index in December: 3
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in December
Summerville, SC
- Average cloud cover in December: 42
The months with the most cloud cover are February and December (Cloud cover 42).
The months with the least cloud cover are July and October (Cloud cover 29).
Average visibility in December
Summerville, 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).
Summerville, South Carolina, USA
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