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
December's onset corresponds with a shift in the average high-temperature, moving from a frosty 45.7°F (7.6°C) in November to an icy 36.7°F (2.6°C). The nighttime temperature, during December, averages of 25.7°F (-3.5°C).Humidity
The average relative humidity in December is 86%.Rainfall
In Glen Richey, in December, it is raining for 8.5 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 136.6 rainfall days, and 18.54" (471mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Glen Richey, during December, snow falls for 8.4 days and regularly aggregates up to 2.24" (57mm) of snow. Throughout the year, in Glen Richey, there are 46.2 snowfall days, and 14.45" (367mm) of snow is accumulated.Daylight
December has the shortest days of the year in Glen Richey, with an average of 9h and 18min of daylight.On the first day of December in Glen Richey, Pennsylvania, sunrise is at 7:19 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:55 pm EST.
Sunshine
The average sunshine in December is 2.8h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 suggests these recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
How cold is December in Glen Richey?
What is the average humidity in December in Glen Richey?
How much does it rain in Glen Richey in December?
How many days does it snow in December in Glen Richey?
What is the month with the shortest days in Glen Richey?
What is the average length of the day in December in Glen Richey?
When is the sunrise / sunset in December in Glen Richey?
How many hours of sunshine does Glen Richey have in December?
What is the month with the lowest UV index in Glen Richey?
How high is the UV index in December in Glen Richey?
Average temperature in December
Glen Richey, PA
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Glen Richey, PA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Glen Richey, PA
- Average wind speed in December: 8.7mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Glen Richey, PA
- Average humidity in December: 86%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is July (77%).
Average rainfall in December
Glen Richey, PA
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (2.28").
The driest months (with the least rainfall) are January and November (1.06").
Average rainfall days in December
Glen Richey, PA
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Glen Richey, PA
- Average snowfall in December: 2.24"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Glen Richey, PA
- Average snowfall days in December: 8.4 days
The month with the highest number of snowfall days is January (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
Glen Richey, 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: 2h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in December
Glen Richey, PA
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in December
Glen Richey, 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
Glen Richey, PA
- Average cloud cover in December: 72
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in December
Glen Richey, 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).
Glen Richey, Pennsylvania, USA
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