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
December's arrival subtly correlates with a reduction in the average high-temperature, down from a fresh 53.2°F (11.8°C) in November to a chilly 44.4°F (6.9°C). Nighttime temperatures hover around an average low of 33.1°F (0.6°C) in December.Humidity
In December, the average relative humidity is 77%.Rainfall
In Moores Mill, in December, it is raining for 8.1 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 103.5 rainfall days, and 8.62" (219mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Moores Mill, during December, snow falls for 2.5 days and regularly aggregates up to 0.35" (9mm) of snow. Throughout the year, there are 13.3 snowfall days, and 1.97" (50mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:44 pm EST.
Sunshine
The average sunshine in December is 5.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Moores Mill have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Moores Mill have in December?
When is the lowest UV index?
How high is the UV index in December in Moores Mill?
Average temperature in December
Moores Mill, NJ
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 33.1°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in December
Moores Mill, NJ
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Moores Mill, NJ
- Average wind speed in December: 7.9mph
The windiest months (with the highest average wind speed) are March and April (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Moores Mill, NJ
- Average humidity in December: 77%
The months with the highest relative humidity are May, June and October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Moores Mill, NJ
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is July (1.14").
The driest months (with the least rainfall) are January and September (0.39").
Average rainfall days in December
Moores Mill, NJ
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is July (12.5 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in December
Moores Mill, NJ
- Average snowfall in December: 0.35"
The months with the highest snowfall are January and March (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Moores Mill, NJ
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (3.8 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
Moores Mill, NJ
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
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
Moores Mill, NJ
- Average sunshine days in December: 20.3 days
The month with the most sunshine days is November (22.7 days).
The month with the least sunshine days is July (14.5 days).
Average UV index in December
Moores Mill, NJ
- 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
Moores Mill, NJ
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Moores Mill, 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).
Moores Mill, New Jersey, USA
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