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
A modest decline in the average high-temperature is seen during December, decreasing from a fresh 53.1°F (11.7°C) in November to a chilly 44.6°F (7°C). An average nighttime temperature of 33.4°F (0.8°C) is observed during December.Humidity
In December, the average relative humidity is 77%.Rainfall
In December, in Lower Mill, the rain falls for 9 days. Throughout December, 1.38" (35mm) of precipitation is accumulated. In Lower Mill, during the entire year, the rain falls for 120.9 days and collects up to 12.8" (325mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Lower Mill. In Lower Mill, during December, snow falls for 2.5 days and regularly aggregates up to 0.59" (15mm) of snow. Throughout the year, in Lower Mill, New Jersey, there are 14.6 snowfall days, and 3.15" (80mm) of snow is accumulated.Daylight
The month with the shortest days in Lower Mill is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 4:33 pm. On the last day of December, in Lower Mill, sunrise is at 7:19 am and sunset at 4:43 pm EST.
Sunshine
The average sunshine in December is 5.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Lower Mill in December?
What is the average humidity in December in Lower Mill?
How much does it rain in Lower Mill in December?
How many days does it snow in December in Lower Mill?
What is the month with the shortest days in Lower Mill?
What is the average length of the day in December in Lower Mill?
When are sunrise and sunset in December in Lower Mill?
How many hours of sunshine does Lower Mill have in December?
When is the lowest UV index in Lower Mill?
How high is the UV index in December in Lower Mill?
Average temperature in December
Lower Mill, NJ
- Average high temperature in December: 44.6°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 33.4°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in December
Lower Mill, 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
Lower Mill, NJ
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are February, March and April (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Lower Mill, NJ
- Average humidity in December: 77%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Lower Mill, NJ
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Lower Mill, NJ
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Lower Mill, NJ
- Average snowfall in December: 0.59"
The month with the highest snowfall is March (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Lower Mill, NJ
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.5 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
Lower Mill, 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 1min
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 54min).
Average sunshine days in December
Lower Mill, NJ
- Average sunshine days in December: 18.9 days
The months with the most sunshine days are January and November (21.3 days).
The month with the least sunshine days is July (13 days).
Average UV index in December
Lower Mill, 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, November and December (UV index 2).
Average cloud cover in December
Lower Mill, NJ
- Average cloud cover in December: 46
The months with the most cloud cover are February and March (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in December
Lower Mill, 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).
Lower Mill, New Jersey, USA
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