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
The beginning of December brings a minor change in the average high-temperature, shifting from a fresh 54.5°F (12.5°C) in November to a chilly 46.8°F (8.2°C). Nighttime temperatures in Cape May hover around an average low of 39.4°F (4.1°C) in December, a slight descent from daytime highs.Humidity
In December, the average relative humidity is 75%.Rainfall
In December, the rain falls for 10.6 days. Throughout December, 3.15" (80mm) of precipitation is accumulated. In Cape May, during the entire year, the rain falls for 158 days and collects up to 35.47" (901mm) of precipitation.Snowfall
January through March and December are months with snowfall. The month with the most snowfall is December, when snow falls for 1.3 days and typically aggregates up to 1.06" (27mm) of snow.Ocean temperature
In Cape May, in December, the average water temperature is 51.8°F (11°C).Note: Swimming in 51.8°F (11°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.
Daylight
December has the shortest days of the year in Cape May, New Jersey, with an average of 9h and 30min of daylight.On the first day of December in Cape May, sunrise is at 6:59 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:47 pm EST.
Sunshine
In December, the average sunshine in Cape May is 5.1h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What are December temperatures in Cape May?
What is the average humidity in December in Cape May?
How many days does it rain in December in Cape May?
When does it snow the most in Cape May?
When does it start to snow in Cape May?
What is the ocean temperature in December in Cape May?
What is the month with the shortest days in Cape May?
How many hours of daylight does Cape May have in December?
What time are sunrise and sunset in December in Cape May?
How long on average sun shines in December in Cape May?
What are the months with the lowest UV index in Cape May?
How high is the UV index in December in Cape May?
Average temperature in December
Cape May, NJ
- Average high temperature in December: 46.8°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (40.5°F).
- Average low temperature in December: 39.4°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 (32.2°F).
Average pressure in December
Cape May, NJ
- Average pressure in December: 30.09"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
Cape May, NJ
- 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 July (9.2mph).
Average humidity in December
Cape May, NJ
- 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
Cape May, NJ
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (2.13").
Average rainfall days in December
Cape May, NJ
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in December
Cape May, NJ
- Average snowfall in December: 1.06"
The month with the highest snowfall is December (1.06").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Cape May, NJ
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Cape May, NJ
- Average sea temperature in December: 52°F
The best month for swimming (with the highest average sea temperature) is August (75°F).
The coldest months (with the lowest average sea temperature) are February and March (43°F).
Average daylight in December /
Average sunshine in December
Cape May, NJ
- Average daylight in December: 9h and 3min
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 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: 4h and 54min).
Average sunshine days in December
Cape May, NJ
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (18.9 days).
The months with the least sunshine days are May and June (12.5 days).
Average UV index in December
Cape May, NJ
- Average UV index in December: 2
The months with the highest UV index are 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
Cape May, NJ
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Cape May, NJ
- 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).
Cape May, New Jersey, USA
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