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
As November transitions to December, the average high-temperature falls from a frosty 45.7°F (7.6°C) to a wintry 36.7°F (2.6°C). Girard, during December nights, experiences a subtle shift to a low average of 30°F (-1.1°C) from the day's heat.Humidity
The average relative humidity in December is 83%.Rainfall
In Girard, in December, during 10.5 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. In Girard, during the entire year, the rain falls for 174.5 days and collects up to 37.8" (960mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 14.3 days. Throughout December, 4.69" (119mm) of snow is accumulated. Throughout the year, there are 69.4 snowfall days, and 24.76" (629mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:30 am and sunset at 4:50 pm. On the last day of December, sunrise is at 7:49 am and sunset at 5:00 pm EST.
Sunshine
In Girard, the average sunshine in December is 2.5h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be careful! The Sun's UV radiation can nearly be doubled by 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 is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Girard have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Girard have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Girard, PA
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in December: 30°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Girard, PA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Girard, PA
- Average wind speed in December: 12.6mph
The windiest months (with the highest average wind speed) are January and December (12.6mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in December
Girard, PA
- Average humidity in December: 83%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are August, September, October and November (78%).
Average rainfall in December
Girard, PA
- Average rainfall in December: 3.23"
The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is November (2.64").
Average rainfall days in December
Girard, PA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is October (18.5 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in December
Girard, PA
- Average snowfall in December: 4.69"
The month with the highest snowfall is February (6.85").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Girard, PA
- Average snowfall days in December: 14.3 days
The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Girard, PA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 2h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in December
Girard, PA
- Average sunshine days in December: 6.1 days
The month with the most sunshine days is September (12.1 days).
The month with the least sunshine days is January (5.7 days).
Average UV index in December
Girard, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Girard, PA
- Average cloud cover in December: 75
The month with the most cloud cover is January (Cloud cover 78).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in December
Girard, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Girard, Pennsylvania, USA
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