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
With the beginning of December, the average high-temperature shows a small decrease, transitioning from a cool 52.3°F (11.3°C) in November to a frosty 44.1°F (6.7°C). During December, the average low-temperature in Wyckoff Mills is an icy 34.7°F (1.5°C).Humidity
The average relative humidity in December is 77%.Rainfall
In Wyckoff Mills, in December, it is raining for 12.6 days, with typically 3.39" (86mm) of accumulated precipitation. Throughout the year, there are 162 rainfall days, and 32.2" (818mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Wyckoff Mills. In Wyckoff Mills, during December, snow falls for 3.2 days and regularly aggregates up to 1.42" (36mm) of snow. In Wyckoff Mills, during the entire year, snow falls for 17 days and aggregates up to 5.55" (141mm) of snow.Daylight
December has the shortest days of the year in Wyckoff Mills, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:00 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:41 pm EST.
Sunshine
The average sunshine in December is 5.1h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Wyckoff Mills. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
How cold is it in Wyckoff Mills in December?
What is the average humidity in December in Wyckoff Mills?
How much does it rain in Wyckoff Mills in December?
How much does it snow in Wyckoff Mills in December?
What is the month with the shortest days in Wyckoff Mills?
What is the average length of the day in December in Wyckoff Mills?
When is the sunrise / sunset in December in Wyckoff Mills?
How many hours of sunshine does Wyckoff Mills have in December?
What are the months with the lowest UV index in Wyckoff Mills?
What is the UV index reading in December in Wyckoff Mills?
Average temperature in December
Wyckoff Mills, NJ
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 34.7°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in December
Wyckoff Mills, NJ
- Average pressure in December: 30.08"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
Wyckoff Mills, NJ
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in December
Wyckoff Mills, NJ
- Average humidity in December: 77%
The months with the highest relative humidity are May and June (79%).
The months with the lowest relative humidity are January, March, April and November (74%).
Average rainfall in December
Wyckoff Mills, NJ
- Average rainfall in December: 3.39"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is January (1.93").
Average rainfall days in December
Wyckoff Mills, NJ
- Average rainfall days in December: 12.6 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (9.2 days).
Average snowfall in December
Wyckoff Mills, NJ
- Average snowfall in December: 1.42"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Wyckoff Mills, NJ
- Average snowfall days in December: 3.2 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Wyckoff Mills, 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 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Wyckoff Mills, NJ
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in December
Wyckoff Mills, 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, March, November and December (UV index 2).
Average cloud cover in December
Wyckoff Mills, NJ
- Average cloud cover in December: 46
The months with the most cloud cover are February, March and December (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in December
Wyckoff Mills, 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).
Wyckoff Mills, New Jersey, USA
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