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 suggests a modest reduction in the average high-temperature, shifting from a frosty 45.7°F (7.6°C) in November to a wintry 36.7°F (2.6°C). An average minimum temperature of 25.7°F (-3.5°C) is recorded during the month of December.Humidity
In December, the average relative humidity is 86%.Rainfall
In December, the rain falls for 8.5 days. Throughout December, 1.46" (37mm) of precipitation is accumulated. Throughout the year, there are 136.6 rainfall days, and 18.54" (471mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Glen Richey, during December, snow falls for 8.4 days and regularly aggregates up to 2.24" (57mm) of snow. In Glen Richey, during the entire year, snow falls for 46.2 days and aggregates up to 14.45" (367mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:19 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:38 am and sunset at 4:55 pm EST.
Sunshine
In Glen Richey, 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 reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 1 in December transforms into this advice:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. To guard against the harmful effects of the Sun, minimize exposure during midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is 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?
How many hours of daylight does Glen Richey have in December?
When is the sunrise / sunset in December in Glen Richey?
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
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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