December weather forecastSandy, SC
December
Weather in December
December, the first month of the winter in Sandy, is still a mild month, with temperature in the range of an average low of 47.3°F (8.5°C) and an average high of 60.4°F (15.8°C).Temperature
The transition to December results in a modest reduction in average high-temperature, moving from an enjoyable 65.8°F (18.8°C) in November to a still refreshing 60.4°F (15.8°C). December witnesses an average nighttime temperature of 47.3°F (8.5°C).Humidity
The most humid month in Sandy is December, with an average relative humidity of 77%.Rainfall
In Sandy, in December, it is raining for 9.5 days, with typically 2.4" (61mm) of accumulated precipitation. In Sandy, during the entire year, the rain falls for 154.4 days and collects up to 23.43" (595mm) of precipitation.Snowfall
January, February and December are months with snowfall. December has the most snowfall days of the year. Snow falls for 0.3 days.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of December in Sandy, sunrise is at 7:05 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:24 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 5.6h of sunshine.UV index
In Sandy, the average daily maximum UV index in December is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A daily high UV index of 4 in December leads to these guidelines:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sandy, SC
- Average high temperature in December: 60.4°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (56.8°F).
- Average low temperature in December: 47.3°F
The month with the highest average low temperature is July (76.5°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).
Average pressure in December
Sandy, 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 (29.98"Hg).
Average wind speed in December
Sandy, SC
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Sandy, SC
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is March (72%).
Average rainfall in December
Sandy, SC
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in December
Sandy, SC
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is August (22.7 days).
The month with the least rainy days is November (6.9 days).
Average snowfall days in December
Sandy, SC
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is December (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Sandy, 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 36min
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 36min).
Average sunshine days in December
Sandy, SC
- Average sunshine days in December: 19 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (6.1 days).
Average UV index in December
Sandy, SC
- Average UV index in December: 4
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in December
Sandy, SC
- Average cloud cover in December: 40
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are June and July (Cloud cover 26).
Average visibility in December
Sandy, 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).
