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
In December, the meteorological conditions alter, with the average high-temperature shifting from a chilly 43.9°F (6.6°C) in November to an icy 34.5°F (1.4°C). During December, Union Center records an average temperature of 25.2°F (-3.8°C) at night.Humidity
In December, the average relative humidity in Union Center is 85%.Rainfall
In Union Center, during December, the rain falls for 8.9 days and regularly aggregates up to 2.13" (54mm) of precipitation. In Union Center, during the entire year, the rain falls for 156.3 days and collects up to 29.25" (743mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Union Center. In Union Center, in December, during 11.8 snowfall days, 5.71" (145mm) of snow is typically accumulated. Throughout the year, there are 63.2 snowfall days, and 33.23" (844mm) of snow is accumulated.Daylight
The month with the shortest days in Union Center is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:15 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:47 pm EST.
Sunshine
The months with the least sunshine in Union Center are January and December, with an average of 3.2h of sunshine.UV index
The months with the lowest UV index in Union Center are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 1 in December translates into these instructions:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Union Center?
What is the average humidity in December in Union Center?
How many days does it rain in December in Union Center?
How much does it snow in Union Center in December?
What is the month with the shortest days in Union Center?
How many hours of daylight does Union Center have in December?
When is the sunrise / sunset in December in Union Center?
What are the months with the least sunshine in Union Center?
How many hours of sunshine does Union Center have in December?
What is the month with the lowest UV index in Union Center?
What is the UV index intensity in December in Union Center?
Average temperature in December
Union Center, PA
- Average high temperature in December: 34.5°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in December: 25.2°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in December
Union Center, 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
Union Center, PA
- Average wind speed in December: 8.1mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Union Center, PA
- Average humidity in December: 85%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (78%).
Average rainfall in December
Union Center, PA
- Average rainfall in December: 2.13"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is January (1.73").
Average rainfall days in December
Union Center, PA
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is February (6.5 days).
Average snowfall in December
Union Center, PA
- Average snowfall in December: 5.71"
The month with the highest snowfall is February (7.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Union Center, PA
- Average snowfall days in December: 11.8 days
The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Union Center, PA
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are January and December (Average sunshine: 3h and 12min).
Average sunshine days in December
Union Center, PA
- Average sunshine days in December: 13.6 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in December
Union Center, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Union Center, PA
- Average cloud cover in December: 68
The months with the most cloud cover are January and December (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 39).
Average visibility in December
Union Center, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Union Center, Pennsylvania, USA
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