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 transition into December involves a decrease in the average high-temperature, falling from a cool 50.9°F (10.5°C) in November to a wintry 41.9°F (5.5°C). In Millburn, an average nighttime temperature of 32.4°F (0.2°C) is expected during December.Humidity
The months with the highest humidity in Millburn are February and December, with an average relative humidity of 77%.Rainfall
In Millburn, during December, the rain falls for 7.4 days and regularly aggregates up to 0.83" (21mm) of precipitation. In Millburn, New Jersey, during the entire year, the rain falls for 117.5 days and collects up to 9.17" (233mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 2.5 days. Throughout December, 0.2" (5mm) of snow is accumulated. In Millburn, during the entire year, snow falls for 16.7 days and aggregates up to 1.97" (50mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:02 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:39 pm EST.
Sunshine
The average sunshine in December in Millburn is 4.9h.UV index
The months with the lowest UV index in Millburn are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
How cold does it get in Millburn in December?
What is the most humid month in Millburn?
What is the average humidity in December in Millburn?
How many days does it rain in December in Millburn?
How many days does it snow in December in Millburn?
What is the month with the shortest days in Millburn?
What is the average length of the day in December in Millburn?
What time are sunrise and sunset in December in Millburn?
How long on average sun shines in December in Millburn?
When is the lowest UV index in Millburn?
How high is the UV index in December in Millburn?
Average temperature in December
Millburn, NJ
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in December: 32.4°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in December
Millburn, 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
Millburn, NJ
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in December
Millburn, NJ
- Average humidity in December: 77%
The months with the highest relative humidity are February and December (77%).
The months with the lowest relative humidity are April and August (72%).
Average rainfall in December
Millburn, NJ
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is July (1.22").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in December
Millburn, NJ
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in December
Millburn, NJ
- Average snowfall in December: 0.2"
The month with the highest snowfall is March (0.75").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Millburn, NJ
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is February (5.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Millburn, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Millburn, NJ
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is January (22.1 days).
The month with the least sunshine days is June (13.5 days).
Average UV index in December
Millburn, 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
Millburn, NJ
- Average cloud cover in December: 47
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Millburn, 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).
Millburn, New Jersey, USA
Weather forecast for your location
2. Allow the app to use your location
