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, shifting from a fresh 50.9°F (10.5°C) in November to an icy 41.2°F (5.1°C). During December, the average low-temperature is a subzero cold 30.9°F (-0.6°C).Humidity
The months with the highest humidity in Haledon are February and December, with an average relative humidity of 78%.Rainfall
The months with the most rainfall are July and December, with an average 3.07" (78mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Haledon, in December, snow falls for 4 days, with typically accumulated 1.54" (39mm) of snow. Throughout the year, there are 24.9 snowfall days, and 10.04" (255mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:38 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 of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What are the most humid months?
What is the average humidity in December in Haledon?
What is the wettest month?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Haledon have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Haledon, NJ
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Haledon, NJ
- Average pressure in December: 30.07"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
Haledon, NJ
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Haledon, NJ
- Average humidity in December: 78%
The months with the highest relative humidity are February and December (78%).
The months with the lowest relative humidity are April, July and August (72%).
Average rainfall in December
Haledon, NJ
- Average rainfall in December: 3.07"
The wettest months (with the highest rainfall) are July and December (3.07").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in December
Haledon, NJ
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is June (17 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in December
Haledon, NJ
- Average snowfall in December: 1.54"
The month with the highest snowfall is February (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Haledon, NJ
- Average snowfall days in December: 4 days
The month with the highest number of snowfall days is February (7.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Haledon, 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 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 36min).
Average sunshine days in December
Haledon, NJ
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in December
Haledon, 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
Haledon, NJ
- Average cloud cover in December: 48
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Haledon, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Haledon, New Jersey, USA
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