December weather forecastSouth Wales, NY
December
Weather in December
December, the first month of the winter in South Wales, is also a wintry month, with an average temperature varying between 34.7°F (1.5°C) and 26.1°F (-3.3°C).Temperature
The onset of December is marked by a decrease in temperature, transitioning from a chilly 44.8°F (7.1°C) in November to an icy 34.7°F (1.5°C). December nights reveal a minor deviation from daytime highs, with a mean low-temperature of 26.1°F (-3.3°C).Humidity
The average relative humidity in December in South Wales, New York, is 86%.Rainfall
In South Wales, in December, during 10.5 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 174.6 rainfall days, and 29.29" (744mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 17.9 days. Throughout December, 7.28" (185mm) of snow is accumulated. In South Wales, New York, during the entire year, snow falls for 88.4 days and aggregates up to 38.39" (975mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December in South Wales, sunrise is at 7:25 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:50 pm EST.
Sunshine
In December, the average sunshine in South Wales is 2.7h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in South Wales. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily high UV index of 1 in December leads to these guidelines:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
South Wales, NY
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in December
South Wales, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
South Wales, NY
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in December
South Wales, NY
- Average humidity in December: 86%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are May, July and September (78%).
Average rainfall in December
South Wales, NY
- Average rainfall in December: 2.48"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
South Wales, NY
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is February (8 days).
Average snowfall in December
South Wales, NY
- Average snowfall in December: 7.28"
The month with the highest snowfall is February (9.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
South Wales, NY
- Average snowfall days in December: 17.9 days
The month with the highest number of snowfall days is January (19.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
South Wales, NY
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 2h and 42min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
South Wales, NY
- Average sunshine days in December: 7 days
The month with the most sunshine days is September (11.9 days).
The month with the least sunshine days is February (5.3 days).
Average UV index in December
South Wales, NY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
South Wales, NY
- Average cloud cover in December: 73
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
South Wales, NY
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (4mi).
