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
Stepping into December, Orviston observes a temperature decline, with the average high falling from November's chilly 45°F (7.2°C) to a cold 35.1°F (1.7°C). Throughout December, Orviston's nights cool down to an average of 25.2°F (-3.8°C).Humidity
February and December, with an average relative humidity of 86%, are the most humid months.Rainfall
In Orviston, in December, it is raining for 13.1 days, with typically 2.87" (73mm) of accumulated precipitation. In Orviston, during the entire year, the rain falls for 179.8 days and collects up to 32.36" (822mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Orviston, during December, snow falls for 13.7 days and regularly aggregates up to 5.35" (136mm) of snow. In Orviston, during the entire year, snow falls for 65.4 days and aggregates up to 28.15" (715mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:17 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:52 pm EST.
Sunshine
The months with the least sunshine are January and December, with an average of 3.2h of sunshine.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 1 suggests this advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What are the most humid months?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Orviston have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Orviston, PA
- Average high temperature in December: 35.1°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 25.2°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in December
Orviston, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Orviston, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Orviston, PA
- Average humidity in December: 86%
The months with the highest relative humidity are February and December (86%).
The month with the lowest relative humidity is July (77%).
Average rainfall in December
Orviston, PA
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is April (3.58").
The driest month (with the least rainfall) is November (2.2").
Average rainfall days in December
Orviston, PA
- Average rainfall days in December: 13.1 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (11.1 days).
Average snowfall in December
Orviston, PA
- Average snowfall in December: 5.35"
The month with the highest snowfall is January (7.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Orviston, PA
- Average snowfall days in December: 13.7 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Orviston, 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: 3h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The months with the least sunshine are January and December (Average sunshine: 3h and 12min).
Average sunshine days in December
Orviston, PA
- Average sunshine days in December: 8.8 days
The month with the most sunshine days is September (14.9 days).
The month with the least sunshine days is February (7.7 days).
Average UV index in December
Orviston, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Orviston, PA
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 39).
Average visibility in December
Orviston, PA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, August, October and November (5mi).
The months with the lowest visibility are January, February, September and December (4mi).
Orviston, Pennsylvania, USA
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