December weather forecastSouth Orleans, MA
December
Weather in December
The first month of the winter, December, is still a chilly month in South Orleans, Massachusetts, with an average temperature ranging between min 37.6°F (3.1°C) and max 44.1°F (6.7°C).Temperature
The onset of December aligns with a soft reduction in the average high-temperature, gently falling from a cool 51.3°F (10.7°C) in November to a chilly 44.1°F (6.7°C). A mild drop to an average of 37.6°F (3.1°C) marks the nights during December.Humidity
The average relative humidity in December is 75%.Rainfall
In South Orleans, in December, it is raining for 6 days, with typically 0.67" (17mm) of accumulated precipitation. Throughout the year, there are 78.2 rainfall days, and 5.75" (146mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. The month with the most snowfall is December, when snow falls for 2.4 days and typically aggregates up to 0.31" (8mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:48 am and sunset at 4:10 pm. On the last day of December, sunrise is at 7:07 am and sunset at 4:19 pm EST.
Sunshine
With an average of 4.3h of sunshine, December has the least sunshine of the year.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
South Orleans, MA
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is August (71.4°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 37.6°F
The month with the highest average low temperature is August (67.8°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in December
South Orleans, MA
- Average pressure in December: 30.02"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
South Orleans, MA
- Average wind speed in December: 17.6mph
The windiest month (with the highest average wind speed) is January (18.3mph).
The calmest month (with the lowest average wind speed) is August (11.4mph).
Average humidity in December
South Orleans, MA
- Average humidity in December: 75%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (74%).
Average rainfall in December
South Orleans, MA
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is October (0.87").
The driest months (with the least rainfall) are July and August (0.28").
Average rainfall days in December
South Orleans, MA
- Average rainfall days in December: 6 days
The month with the highest number of rainy days is April (8.2 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in December
South Orleans, MA
- Average snowfall in December: 0.31"
The month with the highest snowfall is December (0.31").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
South Orleans, MA
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
South Orleans, MA
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in December
South Orleans, MA
- Average sunshine days in December: 21.8 days
The month with the most sunshine days is September (23.4 days).
The month with the least sunshine days is February (19.8 days).
Average UV index in December
South Orleans, MA
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
South Orleans, MA
- Average cloud cover in December: 54
The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
South Orleans, MA
- 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).
