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 brings a decrease in the average high-temperature, falling from November's fresh 50.9°F (10.5°C) to a cold 41.9°F (5.5°C). December's nights observe an average temperature of 30.6°F (-0.8°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In December, the rain falls for 7.7 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. Throughout the year, there are 112.6 rainfall days, and 11.77" (299mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Rockefellows Mills, New Jersey. In December, in Rockefellows Mills, it is snowing for 2.6 days. Throughout December, 0.79" (20mm) of snow is accumulated. Throughout the year, there are 16.7 snowfall days, and 3.98" (101mm) of snow is accumulated.Daylight
The month with the shortest days in Rockefellows Mills is December, with an average of 9h and 18min of daylight.On the first day of December in Rockefellows Mills, sunrise is at 7:04 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:42 pm EST.
Sunshine
The average sunshine in December is 4.8h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 2 during December translates into these guidelines:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. To guard against the harmful effects of the Sun, minimize exposure during midday. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
Is it cold in Rockefellows Mills during December?
What is the average humidity in December in Rockefellows Mills?
How many days does it rain in December in Rockefellows Mills?
How much does it snow in Rockefellows Mills in December?
What is the month with the shortest days in Rockefellows Mills?
What is the average length of the day in December in Rockefellows Mills?
When is the sunrise / sunset in December in Rockefellows Mills?
How many hours of sunshine does Rockefellows Mills have in December?
When is the lowest UV index in Rockefellows Mills?
What is the UV index reading in December in Rockefellows Mills?
Average temperature in December
Rockefellows Mills, NJ
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in December
Rockefellows Mills, 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
Rockefellows Mills, NJ
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Rockefellows Mills, NJ
- Average humidity in December: 79%
The months with the highest relative humidity are February and October (80%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Rockefellows Mills, NJ
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is July (1.46").
The driest month (with the least rainfall) is September (0.63").
Average rainfall days in December
Rockefellows Mills, NJ
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is May (13.1 days).
The month with the least rainy days is January (5.5 days).
Average snowfall in December
Rockefellows Mills, NJ
- Average snowfall in December: 0.79"
The month with the highest snowfall is March (1.1").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Rockefellows Mills, NJ
- Average snowfall days in December: 2.6 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Rockefellows 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 18min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Rockefellows Mills, NJ
- Average sunshine days in December: 21.5 days
The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is June (15.6 days).
Average UV index in December
Rockefellows Mills, 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, March, November and December (UV index 2).
Average cloud cover in December
Rockefellows Mills, NJ
- Average cloud cover in December: 50
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Rockefellows Mills, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are May, September and October (5mi).
Rockefellows Mills, New Jersey, USA
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