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
The shift from November to December involves a decrease in the average high-temperature, dropping from a frosty 49.3°F (9.6°C) to an icy 40.1°F (4.5°C). Kinnelon cools down to an average low-temperature of 28.8°F (-1.8°C) throughout the month of December.Humidity
February, October and December, with an average relative humidity of 80%, are the most humid months.Rainfall
In December, the rain falls for 6.9 days. Throughout December, 0.83" (21mm) of precipitation is accumulated. Throughout the year, in Kinnelon, there are 111.1 rainfall days, and 8.46" (215mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Kinnelon, in December, snow falls for 3.5 days, with typically accumulated 0.51" (13mm) of snow. In Kinnelon, during the entire year, snow falls for 22 days and aggregates up to 3.19" (81mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:03 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:39 pm EST.
Sunshine
In Kinnelon, the average sunshine in December is 4.6h.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 unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 2 in December transforms into this advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the most humid month?
What is the average humidity in December in Kinnelon?
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 Kinnelon have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Kinnelon, NJ
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Kinnelon, 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
Kinnelon, NJ
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Kinnelon, NJ
- Average humidity in December: 80%
The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Kinnelon, NJ
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is July (1.06").
The driest month (with the least rainfall) is September (0.31").
Average rainfall days in December
Kinnelon, NJ
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in December
Kinnelon, NJ
- Average snowfall in December: 0.51"
The month with the highest snowfall is March (0.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Kinnelon, NJ
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (6.1 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
Kinnelon, NJ
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Kinnelon, NJ
- Average sunshine days in December: 21.1 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is May (13.9 days).
Average UV index in December
Kinnelon, 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
Kinnelon, NJ
- Average cloud cover in December: 51
The months with the most cloud cover are February and March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in December
Kinnelon, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, August, November and December (6mi).
The months with the lowest visibility are February, May, June, July, September and October (5mi).
Kinnelon, New Jersey, USA
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