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 change in temperatures is noted as November gives way to December, with average highs reducing from a cool 53.2°F (11.8°C) to a frosty 44.1°F (6.7°C). During December, Mount Royal witnesses a consistent average low-temperature of 32.9°F (0.5°C).Humidity
October and December, with an average relative humidity of 77%, are the most humid months.Rainfall
In December, the rain falls for 7.1 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. In Mount Royal, during the entire year, the rain falls for 113.4 days and collects up to 9.25" (235mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 1.7 days. Throughout December, 0.12" (3mm) of snow is accumulated. Throughout the year, there are 10.9 snowfall days, and 1.65" (42mm) of snow is accumulated.Daylight
The month with the shortest days in Mount Royal is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:03 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:46 pm EST.
Sunshine
In Mount Royal, the average sunshine in December is 5.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mount Royal. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, an average UV index of 2 transforms into the following instructions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is it in Mount Royal in December?
What are the most humid months in Mount Royal?
What is the average humidity in December in Mount Royal?
How many days does it rain in December in Mount Royal?
How much does it snow in Mount Royal in December?
What is the month with the shortest days in Mount Royal?
What is the average length of the day in December in Mount Royal?
When is the sunrise / sunset in December in Mount Royal?
How many hours of sunshine does Mount Royal have in December?
What is the month with the lowest UV index in Mount Royal?
How high is the UV index in December in Mount Royal?
Average temperature in December
Mount Royal, NJ
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Mount Royal, NJ
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Mount Royal, NJ
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are March and April (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Mount Royal, NJ
- Average humidity in December: 77%
The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Mount Royal, NJ
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is August (1.1").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in December
Mount Royal, NJ
- Average rainfall days in December: 7.1 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is November (6.3 days).
Average snowfall in December
Mount Royal, NJ
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Mount Royal, NJ
- Average snowfall days in December: 1.7 days
The month with the highest number of snowfall days is January (3.5 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
Mount Royal, NJ
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
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 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Mount Royal, NJ
- Average sunshine days in December: 22 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (14.7 days).
Average UV index in December
Mount Royal, 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
Mount Royal, NJ
- Average cloud cover in December: 45
The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Mount Royal, 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).
Mount Royal, New Jersey, USA
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