Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December in Selbyville sees a slight reduction in average high-temperature, with a shift from a cool 55°F (12.8°C) in November to a chilly 47.8°F (8.8°C). A modest decline from daytime high temperatures in Selbyville is noticed in December, marking the average low at a cold 39.7°F (4.3°C).Humidity
The average relative humidity in December in Selbyville is 76%.Rainfall
In Selbyville, during December, the rain falls for 11.2 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, there are 144.6 rainfall days, and 25.51" (648mm) of precipitation is accumulated.Snowfall
Months with snowfall in Selbyville, Delaware, are January through March, November and December. In Selbyville, during December, snow falls for 1.7 days and regularly aggregates up to 0.35" (9mm) of snow. Throughout the year, in Selbyville, there are 8.8 snowfall days, and 2.48" (63mm) of snow is accumulated.Daylight
December has the shortest days of the year in Selbyville, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:40 pm. On the last day of December, in Selbyville, Delaware, sunrise is at 7:18 am and sunset at 4:50 pm EST.
Sunshine
The months with the least sunshine in Selbyville are February and December, with an average of 5.1h of sunshine.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Selbyville?
What is the average humidity in December in Selbyville?
How much does it rain in Selbyville in December?
How much does it snow in Selbyville in December?
What is the month with the shortest days in Selbyville?
What is the average length of the day in December in Selbyville?
When is the sunrise / sunset in December in Selbyville?
What are the months with the least sunshine in Selbyville?
How many hours of sunshine does Selbyville have in December?
When is the lowest UV index in Selbyville?
What is the UV index reading in December in Selbyville?
Average temperature in December
Selbyville, DE
- Average high temperature in December: 47.8°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in December: 39.7°F
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).
Average pressure in December
Selbyville, DE
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Selbyville, DE
- Average wind speed in December: 12.2mph
The windiest month (with the highest average wind speed) is January (12.8mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in December
Selbyville, DE
- Average humidity in December: 76%
The month with the highest relative humidity is May (82%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in December
Selbyville, DE
- Average rainfall in December: 1.69"
The wettest months (with the highest rainfall) are July and August (2.87").
The driest month (with the least rainfall) is January (1.5").
Average rainfall days in December
Selbyville, DE
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in December
Selbyville, DE
- Average snowfall in December: 0.35"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Selbyville, DE
- Average snowfall days in December: 1.7 days
The month with the highest number of snowfall days is January (2.6 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
Selbyville, DE
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in December
Selbyville, DE
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
Selbyville, DE
- 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
Selbyville, DE
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Selbyville, DE
- 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).
Selbyville, Delaware, USA
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