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 shift from November to December involves a decrease in the average high-temperature, dropping from a frosty 49.8°F (9.9°C) to an icy 40.8°F (4.9°C). Throughout December, the average low-temperature records at a subzero cold 28.9°F (-1.7°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In Plainfield, Pennsylvania, in December, it is raining for 10.8 days, with typically 2.13" (54mm) of accumulated precipitation. Throughout the year, in Plainfield, there are 158 rainfall days, and 28.03" (712mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Plainfield, in December, during 4.9 snowfall days, 1.89" (48mm) of snow is typically accumulated. Throughout the year, in Plainfield, there are 29.2 snowfall days, and 15.31" (389mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:12 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:31 am and sunset at 4:53 pm EST.
Sunshine
In December, the average sunshine is 4.6h.UV index
The months with the lowest UV index in Plainfield are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Boost your sun resistance with garments that are densely woven yet spacious. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
Is December cold in Plainfield?
What is the average humidity in December in Plainfield?
How much does it rain in Plainfield in December?
How much does it snow in Plainfield in December?
What is the month with the shortest days in Plainfield?
What is the average length of the day in December in Plainfield?
When are sunrise and sunset in December in Plainfield?
How long on average sun shines in December in Plainfield?
What is the month with the lowest UV index in Plainfield?
How high is the UV index in December in Plainfield?
Average temperature in December
Plainfield, PA
- Average high temperature in December: 40.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.7°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in December
Plainfield, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Plainfield, PA
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Plainfield, PA
- Average humidity in December: 79%
The months with the highest relative humidity are February, May and October (80%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in December
Plainfield, PA
- Average rainfall in December: 2.13"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Plainfield, PA
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in December
Plainfield, PA
- Average snowfall in December: 1.89"
The month with the highest snowfall is January (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Plainfield, PA
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Plainfield, 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 24min).
- 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 24min).
Average sunshine days in December
Plainfield, PA
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (11 days).
Average UV index in December
Plainfield, PA
- Average UV index in December: 2
The months with the highest UV index are May, 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
Plainfield, 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 32).
Average visibility in December
Plainfield, PA
- Average visibility in December: 6mi
The months with the highest visibility are April, June, July, August, November and December (6mi).
The months with the lowest visibility are January, February, March, May, September and October (5mi).
Plainfield, Pennsylvania, USA
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