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
Start of December brings a slight shift in the average high-temperature, dipping a bit from November's fresh 52°F (11.1°C) to a chilly 43.2°F (6.2°C). Slackwoods encounters a steady low-temperature average of 32°F (0°C) throughout the month of December.Humidity
In December, the average relative humidity is 77%.Rainfall
In Slackwoods, in December, during 11.2 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. In Slackwoods, during the entire year, the rain falls for 156.8 days and collects up to 31.81" (808mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Slackwoods, in December, snow falls for 3 days, with typically accumulated 1.3" (33mm) of snow. Throughout the year, there are 16.6 snowfall days, and 8.86" (225mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 4:33 pm. On the last day of December, in Slackwoods, New Jersey, sunrise is at 7:21 am and sunset at 4:43 pm EST.
Sunshine
In December, the average sunshine is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Slackwoods, New Jersey. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 2 in December translates into this advice:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. 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 does it get in Slackwoods in December?
What is the average humidity in December in Slackwoods?
How many days does it rain in December in Slackwoods?
How many days does it snow in December in Slackwoods?
What is the month with the shortest days in Slackwoods?
What is the average length of the day in December in Slackwoods?
When are sunrise and sunset in December in Slackwoods?
How long on average sun shines in December in Slackwoods?
What is the month with the lowest UV index in Slackwoods?
What is the UV index reading in December in Slackwoods?
Average temperature in December
Slackwoods, NJ
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 32°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in December
Slackwoods, 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
Slackwoods, NJ
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Slackwoods, NJ
- Average humidity in December: 77%
The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Slackwoods, NJ
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is July (3.74").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in December
Slackwoods, NJ
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in December
Slackwoods, NJ
- Average snowfall in December: 1.3"
The month with the highest snowfall is March (2.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Slackwoods, NJ
- Average snowfall days in December: 3 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Slackwoods, 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Slackwoods, NJ
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in December
Slackwoods, 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
Slackwoods, NJ
- Average cloud cover in December: 47
The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Slackwoods, 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).
Slackwoods, New Jersey, USA
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