December weather forecastYardley, PA
December
Weather in December
The first month of the winter, December, is also a frosty month in Yardley, Pennsylvania, with an average temperature fluctuating between 43°F (6.1°C) and 31.3°F (-0.4°C).Temperature
As December begins, there is a decrease in the average high-temperature, falling from a fresh 52°F (11.1°C) in November to a chilly 43°F (6.1°C). An average low-temperature of 31.3°F (-0.4°C) is common during the nights of December.Humidity
The months with the highest humidity are February, October and December, with an average relative humidity of 78%.Rainfall
In Yardley, Pennsylvania, in December, during 7.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 116.7 rainfall days, and 10.12" (257mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, November and December. In Yardley, in December, during 2.5 snowfall days, 0.43" (11mm) of snow is typically accumulated. Throughout the year, there are 14.2 snowfall days, and 2.44" (62mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:03 am and sunset at 4:34 pm. On the last day of December, in Yardley, sunrise is at 7:21 am and sunset at 4:43 pm EST.
Sunshine
The average sunshine in December in Yardley is 5h.UV index
The months with the lowest UV index in Yardley are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 2 during December translates into the following guidance:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Yardley, PA
- Average high temperature in December: 43°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 31.3°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Yardley, PA
- Average pressure in December: 30.09"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
Yardley, PA
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Yardley, PA
- Average humidity in December: 78%
The months with the highest relative humidity are February, October and December (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Yardley, PA
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is July (1.26").
The driest month (with the least rainfall) is September (0.51").
Average rainfall days in December
Yardley, PA
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is May (13.1 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in December
Yardley, PA
- Average snowfall in December: 0.43"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Yardley, PA
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Yardley, PA
- Average daylight in December: 9h and 24min
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: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Yardley, PA
- Average sunshine days in December: 21.6 days
The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is June (14.8 days).
Average UV index in December
Yardley, PA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Yardley, PA
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Yardley, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
