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 sea temperature 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 Delaware City implies a gentle temperature shift, with average high-temperatures reducing from November's cool 53.4°F (11.9°C) to a frosty 44.4°F (6.9°C). Delaware City's nights in December experience an average temperature drop to a wintry 33.3°F (0.7°C).Humidity
In December, the average relative humidity in Delaware City is 77%.Rainfall
In Delaware City, in December, during 9.6 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In Delaware City, Delaware, during the entire year, the rain falls for 145.9 days and collects up to 24.45" (621mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 2.1 days. Throughout December, 0.35" (9mm) of snow is accumulated. In Delaware City, Delaware, during the entire year, snow falls for 13 days and aggregates up to 5.24" (133mm) of snow.Ocean temperature
In Delaware City, in December, the average water temperature is 48.6°F (9.2°C).Note: In 48.6°F (9.2°C), even brief exposure to 55.4°F (13°C) feels biting, and anything less than 50°F (10°C) risks cold shock and impaired breathing, considering one's health.
Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:04 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:48 pm EST.
Sunshine
In December, the average sunshine in Delaware City is 5.1h.UV index
The months with the lowest UV index in Delaware City are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold does it get in Delaware City in December?
What is the average humidity in December in Delaware City?
How many days does it rain in December in Delaware City?
How much does it snow in Delaware City in December?
What is the ocean temperature in December in Delaware City?
What is the month with the shortest days in Delaware City?
How many hours of daylight does Delaware City have in December?
What time are sunrise and sunset in December in Delaware City?
How many hours of sunshine does Delaware City have in December?
When is the lowest UV index in Delaware City?
What is the UV index intensity in December in Delaware City?
Average temperature in December
Delaware City, DE
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in December
Delaware City, DE
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Delaware City, DE
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Delaware City, DE
- Average humidity in December: 77%
The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Delaware City, DE
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is August (3.11").
The driest month (with the least rainfall) is January (1.54").
Average rainfall days in December
Delaware City, DE
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Delaware City, DE
- Average snowfall in December: 0.35"
The month with the highest snowfall is January (1.65").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Delaware City, DE
- Average snowfall days in December: 2.1 days
The month with the highest number of snowfall days is January (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Delaware City, DE
- Average sea temperature in December: 48.5°F
The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (40.9°F).
Average daylight in December /
Average sunshine in December
Delaware City, DE
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Delaware City, DE
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in December
Delaware City, 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, November and December (UV index 2).
Average cloud cover in December
Delaware City, DE
- Average cloud cover in December: 45
The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Delaware City, 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).
Delaware City, Delaware, USA
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