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 South Bethany enters December, the average high-temperature subtly lowers from the a fresh 55°F (12.8°C) of November to a frosty 47.8°F (8.8°C). The nighttime temperature demonstrates a marginal decline, averaging at a cold 40.1°F (4.5°C) during December.Humidity
In South Bethany, the average relative humidity in December is 76%.Rainfall
In South Bethany, in December, it is raining for 11.1 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, there are 147.8 rainfall days, and 23.98" (609mm) of precipitation is accumulated.Snowfall
January through March and December are months with snowfall in South Bethany, Delaware. December is the first month it typically snows in South Bethany, Delaware. Throughout December, in the average 1.7 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 8.7 snowfall days, and 1.54" (39mm) of snow is accumulated.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
The average sunshine in December in South Bethany is 5.1h.UV index
The months with the lowest UV index in South Bethany are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 2 in December translates into this advice:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in South Bethany?
What is the average humidity in December in South Bethany?
How many days does it rain in December in South Bethany?
When does it start to snow in South Bethany?
What is the month with the shortest days in South Bethany?
What is the average length of the day in December in South Bethany?
When are sunrise and sunset in December in South Bethany?
How long on average sun shines in December in South Bethany?
What are the months with the lowest UV index in South Bethany?
What is the UV index intensity in December in South Bethany?
Average temperature in December
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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
South Bethany, 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).
South Bethany, Delaware, USA
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