December weather forecastDuncan, SC
December
Weather in December
December, the first month of the winter in Duncan, is also a fresh month, with an average temperature fluctuating between 52.5°F (11.4°C) and 38.3°F (3.5°C).Temperature
As December commences, the average high-temperature subtly reduces, transitioning from a refreshing 59.9°F (15.5°C) in November to a cool 52.5°F (11.4°C). The average temperature in Duncan drops to an icy 38.3°F (3.5°C) during the night in the month of December.Humidity
December is the most humid month in Duncan, with an average relative humidity of 76%.Rainfall
December is the month with the most rainfall in Duncan. Rain falls for 10 days and accumulates 3.35" (85mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Duncan. December is the month with the most snowfall in Duncan. Snow falls for 0.5 days and accumulates 2.2" (56mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 7:18 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 5:27 pm EST.
Sunshine
December has the least sunshine of the year in Duncan, with an average of 5.3h of sunshine.UV index
The months with the lowest UV index in Duncan, South Carolina, are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. To guard against the harmful effects of the Sun, minimize exposure during midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Duncan, SC
- Average high temperature in December: 52.5°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (48.9°F).
- Average low temperature in December: 38.3°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).
Average pressure in December
Duncan, SC
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in December
Duncan, SC
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Duncan, SC
- Average humidity in December: 76%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (67%).
Average rainfall in December
Duncan, SC
- Average rainfall in December: 3.35"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in December
Duncan, SC
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (8.2 days).
Average snowfall in December
Duncan, SC
- Average snowfall in December: 2.2"
The month with the highest snowfall is December (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Duncan, SC
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (1.6 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
Duncan, SC
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 18min
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 18min).
Average sunshine days in December
Duncan, SC
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is October (22.3 days).
The month with the least sunshine days is August (13.3 days).
Average UV index in December
Duncan, 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).
Average cloud cover in December
Duncan, SC
- Average cloud cover in December: 43
The month with the most cloud cover is December (Cloud cover 43).
The months with the least cloud cover are June and July (Cloud cover 28).
Average visibility in December
Duncan, 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).
