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 beginning of December marks a decrease in the average high-temperature, transitioning from a chilly 45.5°F (7.5°C) in November to a cold 36.3°F (2.4°C). Shades Glen throughout December, experiences an average nighttime temperature of 25.5°F (-3.6°C).Humidity
February and December, with an average relative humidity of 84%, are the most humid months.Rainfall
In Shades Glen, in December, during 7.7 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. In Shades Glen, during the entire year, the rain falls for 121.7 days and collects up to 10.59" (269mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Shades Glen, in December, snow falls for 9.1 days, with typically accumulated 1.38" (35mm) of snow. Throughout the year, there are 47 snowfall days, and 8.23" (209mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:09 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:44 pm EST.
Sunshine
In Shades Glen, the average sunshine in December is 3.9h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What are the most humid months?
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?
How many hours of daylight does Shades Glen have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Shades Glen, PA
- Average high temperature in December: 36.3°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Shades Glen, 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
Shades Glen, PA
- Average wind speed in December: 8mph
The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Shades Glen, PA
- Average humidity in December: 84%
The months with the highest relative humidity are February and December (84%).
The months with the lowest relative humidity are April, June and July (78%).
Average rainfall in December
Shades Glen, PA
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is July (1.22").
The driest month (with the least rainfall) is September (0.59").
Average rainfall days in December
Shades Glen, PA
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in December
Shades Glen, PA
- Average snowfall in December: 1.38"
The months with the highest snowfall are January, February and March (1.73").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Shades Glen, PA
- Average snowfall days in December: 9.1 days
The month with the highest number of snowfall days is February (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Shades Glen, PA
- 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: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in December
Shades Glen, PA
- Average sunshine days in December: 18 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in December
Shades Glen, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Shades Glen, PA
- Average cloud cover in December: 60
The months with the most cloud cover are February and December (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in December
Shades Glen, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Shades Glen, Pennsylvania, USA
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