December weather forecastOrchard Hills, PA
December
Weather in December
The first month of the winter, December, is also an icy month in Orchard Hills, Pennsylvania, with an average temperature varying between 27.3°F (-2.6°C) and 38.7°F (3.7°C).Temperature
A subtle decrease in the average high-temperature marks December, falling from November's frosty 48.4°F (9.1°C) to a cold 38.7°F (3.7°C). Orchard Hills reports an average low-temperature of 27.3°F (-2.6°C) during the nights of December.Humidity
In Orchard Hills, Pennsylvania, the average relative humidity in December is 84%.Rainfall
In December, the rain falls for 10.1 days. Throughout December, 1.38" (35mm) of precipitation is accumulated. In Orchard Hills, Pennsylvania, during the entire year, the rain falls for 147.1 days and collects up to 18.54" (471mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Orchard Hills, in December, during 9.1 snowfall days, 2.2" (56mm) of snow is typically accumulated. In Orchard Hills, during the entire year, snow falls for 45.9 days and aggregates up to 11.3" (287mm) 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 December, sunrise is at 7:23 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:01 pm EST.
Sunshine
In December, the average sunshine is 3.1h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 1 during December translates into the following directions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Orchard Hills, PA
- Average high temperature in December: 38.7°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Orchard Hills, 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
Orchard Hills, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Orchard Hills, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
Orchard Hills, PA
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is November (1.02").
Average rainfall days in December
Orchard Hills, PA
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is May (17.6 days).
The months with the least rainy days are January and February (7.8 days).
Average snowfall in December
Orchard Hills, PA
- Average snowfall in December: 2.2"
The month with the highest snowfall is February (2.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Orchard Hills, PA
- Average snowfall days in December: 9.1 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Orchard Hills, PA
- Average daylight in December: 9h and 18min
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 18min).
- Average sunshine in December: 3h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in December
Orchard Hills, PA
- Average sunshine days in December: 14 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is May (10 days).
Average UV index in December
Orchard Hills, PA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Orchard Hills, PA
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Orchard Hills, PA
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
