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
Long Valley in December undergoes a mild reduction in the average high-temperature, shifting from November's frosty 49.6°F (9.8°C) to a cold 40.1°F (4.5°C). An average low-temperature of 28.6°F (-1.9°C) is observed during December nights in Long Valley.Humidity
In December, the average relative humidity in Long Valley is 80%.Rainfall
In Long Valley, in December, it is raining for 12 days, with typically 2.76" (70mm) of accumulated precipitation. In Long Valley, during the entire year, the rain falls for 161.9 days and collects up to 28.78" (731mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 5 days. Throughout December, 2.09" (53mm) of snow is accumulated. Throughout the year, there are 30.8 snowfall days, and 14.21" (361mm) 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 December, sunrise is at 7:04 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:41 pm EST.
Sunshine
In Long Valley, 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 exposure to the Sun's UV radiation for ordinary individuals.Note: An average UV index of 2 in December transforms into this advice:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Frequently asked questions
Is it cold in Long Valley during December?
What is the average humidity in December in Long Valley?
How much does it rain in Long Valley in December?
How much does it snow in Long Valley in December?
What is the month with the shortest days in Long Valley?
What is the average length of the day in December in Long Valley?
When is the sunrise / sunset in December in Long Valley?
How many hours of sunshine does Long Valley have in December?
What are the months with the lowest UV index in Long Valley?
What is the UV index intensity in December in Long Valley?
Average temperature in December
Long Valley, NJ
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Long Valley, 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
Long Valley, NJ
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Long Valley, NJ
- Average humidity in December: 80%
The months with the highest relative humidity are February and October (81%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Long Valley, NJ
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is July (2.95").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in December
Long Valley, NJ
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Long Valley, NJ
- Average snowfall in December: 2.09"
The month with the highest snowfall is February (3.78").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Long Valley, NJ
- Average snowfall days in December: 5 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Long Valley, 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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Long Valley, NJ
- Average sunshine days in December: 16 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in December
Long Valley, NJ
- Average UV index in December: 2
The months with the highest UV index are June and July (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
Long Valley, NJ
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Long Valley, NJ
- Average visibility in December: 6mi
The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).
Long Valley, New Jersey, USA
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