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
In the transition to December, Dewey Beach observes a minor drop in the average high-temperature, shifting from a fresh 54.5°F (12.5°C) in November to a chilly 47.3°F (8.5°C). Dewey Beach consistently logs a low temperature averaging a wintry 39.4°F (4.1°C) during December, a modest drop from daytime temperatures.Humidity
In Dewey Beach, Delaware, the average relative humidity in December is 75%.Rainfall
In Dewey Beach, in December, during 6.6 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. Throughout the year, there are 89.4 rainfall days, and 6.18" (157mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. The months with the most snowfall in Dewey Beach are January and December, with an average 0.12" (3mm) of accumulated snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Dewey Beach, Delaware.On the first day of December, sunrise is at 6:59 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:49 pm EST.
Sunshine
In Dewey Beach, the average sunshine in December is 5.3h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 2 in December leads to these recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are December temperatures in Dewey Beach?
What is the average humidity in December in Dewey Beach?
How much does it rain in Dewey Beach in December?
What is the snowiest month in Dewey Beach?
How much does it snow in Dewey Beach in December?
What is the month with the shortest days in Dewey Beach?
How many hours of daylight does Dewey Beach have in December?
When are sunrise and sunset in December in Dewey Beach?
How many hours of sunshine does Dewey Beach have in December?
What are the months with the lowest UV index in Dewey Beach?
What is the UV index reading in December in Dewey Beach?
Average temperature in December
Dewey Beach, DE
- Average high temperature in December: 47.3°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 (41.4°F).
- Average low temperature in December: 39.4°F
The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).
Average pressure in December
Dewey 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
Dewey Beach, DE
- Average wind speed in December: 12.6mph
The windiest month (with the highest average wind speed) is January (13mph).
The calmest month (with the lowest average wind speed) is August (8.8mph).
Average humidity in December
Dewey Beach, DE
- Average humidity in December: 75%
The month with the highest relative humidity is May (82%).
The month with the lowest relative humidity is November (73%).
Average rainfall in December
Dewey Beach, DE
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is October (0.71").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in December
Dewey Beach, DE
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is November (4.9 days).
Average snowfall in December
Dewey Beach, DE
- Average snowfall in December: 0.12"
The months with the highest snowfall are January and December (0.12").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Dewey Beach, DE
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is January (2.4 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
Dewey 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 2min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Dewey Beach, DE
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is January (23.5 days).
The months with the least sunshine days are June and July (18.2 days).
Average UV index in December
Dewey 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, February and December (UV index 2).
Average cloud cover in December
Dewey Beach, DE
- Average cloud cover in December: 43
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 24).
Average visibility in December
Dewey 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).
Dewey Beach, Delaware, USA
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