December weather forecastWilliamston, SC
December
Weather in December
December, the first month of the winter in Williamston, is also a fresh month, with temperature in the range of an average low of 38.5°F (3.6°C) and an average high of 53.2°F (11.8°C).Temperature
December's arrival subtly correlates with a reduction in the average high-temperature, down from a moderate 60.3°F (15.7°C) in November to a cool 53.2°F (11.8°C). In Williamston, December's nights observe an average temperature dip to a wintry 38.5°F (3.6°C).Humidity
December is the most humid month, with an average relative humidity of 77%.Rainfall
In Williamston, in December, it is raining for 11.5 days, with typically 4.02" (102mm) of accumulated precipitation. In Williamston, South Carolina, during the entire year, the rain falls for 158.8 days and collects up to 38.35" (974mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Williamston, in December, during 0.5 snowfall days, 0.31" (8mm) of snow is typically accumulated. In Williamston, during the entire year, snow falls for 3.5 days and aggregates up to 2.68" (68mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 7:19 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 5:29 pm EST.
Sunshine
With an average of 5.1h of sunshine, December has the least sunshine of the year.UV index
In Williamston, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Williamston, SC
- Average high temperature in December: 53.2°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (50°F).
- Average low temperature in December: 38.5°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (34.5°F).
Average pressure in December
Williamston, 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 (29.98"Hg).
Average wind speed in December
Williamston, SC
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is February (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Williamston, SC
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
Williamston, SC
- Average rainfall in December: 4.02"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Williamston, SC
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is October (8.5 days).
Average snowfall in December
Williamston, SC
- Average snowfall in December: 0.31"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Williamston, SC
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (1.3 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
Williamston, 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 6min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in December
Williamston, SC
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is July (11.5 days).
Average UV index in December
Williamston, SC
- Average UV index in December: 3
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Williamston, SC
- Average cloud cover in December: 45
The months with the most cloud cover are February and December (Cloud cover 45).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in December
Williamston, SC
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
