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
Onset of December witnesses a reduction in the average high-temperature, falling from a frosty 46.9°F (8.3°C) in November to a wintry 37°F (2.8°C). During December, Zion observes a consistent average nighttime temperature of 26.2°F (-3.2°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 84%.Rainfall
In Zion, during December, the rain falls for 11.5 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Zion, during the entire year, the rain falls for 161.9 days and collects up to 25.79" (655mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Zion, in December, during 10.6 snowfall days, 3.82" (97mm) of snow is typically accumulated. In Zion, during the entire year, snow falls for 54.8 days and aggregates up to 19.88" (505mm) of snow.Daylight
December has the shortest days of the year in Zion, Pennsylvania, with an average of 9h and 18min of daylight.On the first day of December in Zion, sunrise is at 7:16 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:52 pm EST.
Sunshine
The average sunshine in December in Zion is 3.6h.UV index
December is the month with the lowest UV index in Zion, Pennsylvania, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Zion in December?
What are the most humid months in Zion?
What is the average humidity in December in Zion?
How much does it rain in Zion in December?
How many days does it snow in December in Zion?
What is the month with the shortest days in Zion?
How many hours of daylight does Zion have in December?
When is the sunrise / sunset in December in Zion?
How long on average sun shines in December in Zion?
When is the lowest UV index in Zion?
How high is the UV index in December in Zion?
Average temperature in December
Zion, PA
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 26.2°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Zion, 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
Zion, PA
- Average wind speed in December: 7.1mph
The windiest months (with the highest average wind speed) are January and April (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Zion, PA
- Average humidity in December: 84%
The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is July (76%).
Average rainfall in December
Zion, PA
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is November (1.61").
Average rainfall days in December
Zion, PA
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (8.4 days).
Average snowfall in December
Zion, PA
- Average snowfall in December: 3.82"
The month with the highest snowfall is January (4.88").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Zion, PA
- Average snowfall days in December: 10.6 days
The month with the highest number of snowfall days is January (14.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Zion, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Zion, PA
- Average sunshine days in December: 12.1 days
The month with the most sunshine days is November (15.6 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in December
Zion, PA
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Zion, PA
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Zion, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Zion, Pennsylvania, USA
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