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
As December arrives, Bethany Beach's weather displays a minor decrease in high-temperatures, transitioning from November's cool 55°F (12.8°C) to a frosty 47.8°F (8.8°C). The temperature during December sees a subtle transition from day to night, averaging a low of 40.1°F (4.5°C).Humidity
The average relative humidity in December is 76%.Rainfall
In Bethany Beach, Delaware, in December, during 11.1 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. In Bethany Beach, during the entire year, the rain falls for 147.8 days and collects up to 23.98" (609mm) of precipitation.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 1.7 snowfall days, it receives 0.2" (5mm) of snow. In Bethany Beach, during the entire year, snow falls for 8.7 days and aggregates up to 1.54" (39mm) of snow.Daylight
December has the shortest days of the year, 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 4:39 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:49 pm EST.
Sunshine
In December, the average sunshine is 5.1h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Bethany Beach. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Minimize direct exposure to the Sun during midday when its radiation is at its peak. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Bethany Beach in December?
What is the average humidity in December?
How much does it rain in December?
When does it start to snow?
What is the month with the shortest days?
How many hours of daylight does Bethany Beach have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Bethany Beach, DE
- Average high temperature in December: 47.8°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (41.7°F).
- Average low temperature in December: 40.1°F
The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in December
Bethany Beach, 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
Bethany Beach, DE
- Average wind speed in December: 13mph
The windiest month (with the highest average wind speed) is January (13.5mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in December
Bethany Beach, DE
- Average humidity in December: 76%
The month with the highest relative humidity is May (82%).
The month with the lowest relative humidity is November (73%).
Average rainfall in December
Bethany Beach, DE
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is August (2.68").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in December
Bethany Beach, DE
- Average rainfall days in December: 11.1 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in December
Bethany Beach, DE
- Average snowfall in December: 0.2"
The month with the highest snowfall is January (0.55").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Bethany Beach, DE
- Average snowfall days in December: 1.7 days
The month with the highest number of snowfall days is January (2.8 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
Bethany Beach, 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 month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Bethany Beach, DE
- Average sunshine days in December: 16.3 days
The months with the most sunshine days are January and November (18.4 days).
The month with the least sunshine days is August (13.2 days).
Average UV index in December
Bethany Beach, 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
Bethany Beach, DE
- Average cloud cover in December: 45
The months with the most cloud cover are February, March and December (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Bethany Beach, 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).
Bethany Beach, Delaware, USA
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