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 corresponds with a decrease in the average high-temperature, down to an icy 36.7°F (2.6°C) from a chilly 46.2°F (7.9°C). December nights observe an average temperature dip to a subzero cold 26.1°F (-3.3°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In Gray, during December, the rain falls for 9.7 days and regularly aggregates up to 2.64" (67mm) of precipitation. Throughout the year, in Gray, there are 164.4 rainfall days, and 30.08" (764mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 11.1 days. Throughout December, 5.04" (128mm) of snow is accumulated. Throughout the year, there are 56.8 snowfall days, and 27.6" (701mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Gray.On the first day of the month, sunrise is at 7:20 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:38 am and sunset at 5:00 pm EST.
Sunshine
In Gray, the average sunshine in December is 3.3h.UV index
The month with the lowest UV index in Gray is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Avoiding the Sun during its peak radiation time around midday is a healthy practice. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Frequently asked questions
How cold is it in Gray in December?
What is the average humidity in December in Gray?
How many days does it rain in December in Gray?
How many days does it snow in December in Gray?
What is the month with the shortest days in Gray?
What is the average length of the day in December in Gray?
When are sunrise and sunset in December in Gray?
How long on average sun shines in December in Gray?
What is the month with the lowest UV index in Gray?
What is the UV index reading in December in Gray?
Average temperature in December
Gray, PA
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Gray, 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
Gray, PA
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Gray, PA
- Average humidity in December: 86%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, June and July (79%).
Average rainfall in December
Gray, PA
- Average rainfall in December: 2.64"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is November (1.65").
Average rainfall days in December
Gray, PA
- Average rainfall days in December: 9.7 days
The month with the highest number of rainy days is May (19.9 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Gray, PA
- Average snowfall in December: 5.04"
The month with the highest snowfall is January (6.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Gray, PA
- Average snowfall days in December: 11.1 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Gray, 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 2min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Gray, PA
- Average sunshine days in December: 12.7 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is May (9.3 days).
Average UV index in December
Gray, 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
Gray, PA
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in December
Gray, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Gray, Pennsylvania, USA
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