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
With December's arrival, Arlington Knolls's weather changes as the average high-temperature falls from a chilly 49.1°F (9.5°C) in November to a cold 40.1°F (4.5°C). In Arlington Knolls, December is marked by an average low-temperature of 28.9°F (-1.7°C).Humidity
The average relative humidity in December in Arlington Knolls is 80%.Rainfall
In December, in Arlington Knolls, the rain falls for 12.1 days. Throughout December, 2.87" (73mm) of precipitation is accumulated. Throughout the year, in Arlington Knolls, there are 162.5 rainfall days, and 31.69" (805mm) of precipitation is accumulated.Snowfall
Months with snowfall in Arlington Knolls are January through May, October through December. In Arlington Knolls, Pennsylvania, during December, snow falls for 5.5 days and regularly aggregates up to 2.95" (75mm) of snow. In Arlington Knolls, during the entire year, snow falls for 32.3 days and aggregates up to 17.24" (438mm) 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 the month, sunrise is at 7:07 am and sunset at 4:35 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:44 pm EST.
Sunshine
In Arlington Knolls, Pennsylvania, the average sunshine in December is 4.7h.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 minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: During December, 2 as the daily maximum UV index converts into the following advice:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
Is December cold in Arlington Knolls?
What is the average humidity in December in Arlington Knolls?
How much does it rain in Arlington Knolls in December?
How much does it snow in Arlington Knolls in December?
What is the month with the shortest days in Arlington Knolls?
How many hours of daylight does Arlington Knolls have in December?
When is the sunrise / sunset in December in Arlington Knolls?
How many hours of sunshine does Arlington Knolls have in December?
What is the month with the lowest UV index in Arlington Knolls?
What is the UV index intensity in December in Arlington Knolls?
Average temperature in December
Arlington Knolls, PA
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in December: 28.9°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
Arlington Knolls, PA
- 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
Arlington Knolls, PA
- Average wind speed in December: 7.6mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Arlington Knolls, PA
- Average humidity in December: 80%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in December
Arlington Knolls, PA
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Arlington Knolls, PA
- Average rainfall days in December: 12.1 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (9.9 days).
Average snowfall in December
Arlington Knolls, PA
- Average snowfall in December: 2.95"
The month with the highest snowfall is March (4.88").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Arlington Knolls, PA
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Arlington Knolls, PA
- 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Arlington Knolls, PA
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is February (11.7 days).
Average UV index in December
Arlington Knolls, PA
- 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
Arlington Knolls, PA
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Arlington Knolls, PA
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Arlington Knolls, Pennsylvania, USA
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