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 the onset of December, Percy's average high-temperature adjusts, receding from November's chilly 49.3°F (9.6°C) to a wintry 39.7°F (4.3°C). Nightly temperatures in Percy drop to an average low of 27.9°F (-2.3°C) in December.Humidity
In December, the average relative humidity is 84%.Rainfall
In Percy, in December, during 9.4 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Percy, during the entire year, the rain falls for 150.7 days and collects up to 16.65" (423mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Percy, during December, snow falls for 11.5 days and regularly aggregates up to 3.74" (95mm) of snow. Throughout the year, there are 58.2 snowfall days, and 17.44" (443mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:21 am and sunset at 4:54 pm. On the last day of December, in Percy, sunrise is at 7:40 am and sunset at 5:03 pm EST.
Sunshine
In Percy, the average sunshine in December is 3.5h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Percy. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days in Percy?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Percy have in December?
When is the lowest UV index in Percy?
What is the UV index intensity in December?
Average temperature in December
Percy, PA
- Average high temperature in December: 39.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in December: 27.9°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in December
Percy, 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
Percy, PA
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Percy, PA
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July and August (77%).
Average rainfall in December
Percy, PA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (1.97").
The driest months (with the least rainfall) are September and November (0.91").
Average rainfall days in December
Percy, PA
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in December
Percy, PA
- Average snowfall in December: 3.74"
The month with the highest snowfall is January (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Percy, PA
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Percy, 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: 3h and 3min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Percy, PA
- Average sunshine days in December: 12.1 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is January (8.6 days).
Average UV index in December
Percy, PA
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Percy, PA
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Percy, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The month with the lowest visibility is January (4mi).
Percy, Pennsylvania, USA
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