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
The arrival of December corresponds with a temperature reduction, down from November's chilly 46.8°F (8.2°C) to an icy 36.9°F (2.7°C). An average low-temperature of 26.4°F (-3.1°C) is noted during the nights in December in Julian, Pennsylvania.Humidity
The months with the highest humidity are February and December, with an average relative humidity of 84%.Rainfall
In Julian, in December, during 12.6 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. Throughout the year, in Julian, Pennsylvania, there are 175.7 rainfall days, and 30.94" (786mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Julian. In Julian, during December, snow falls for 11.5 days and regularly aggregates up to 4.45" (113mm) of snow. Throughout the year, there are 59 snowfall days, and 26.3" (668mm) of snow is accumulated.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 4:44 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:54 pm EST.
Sunshine
In Julian, the average sunshine in December is 3.7h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Julian, Pennsylvania. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 1 during December leads to these advisories:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
How cold is December in Julian?
What are the most humid months in Julian?
What is the average humidity in December in Julian?
How many days does it rain in December in Julian?
How many days does it snow in December in Julian?
What is the month with the shortest days in Julian?
What is the average length of the day in December in Julian?
When is the sunrise / sunset in December in Julian?
How many hours of sunshine does Julian have in December?
When is the lowest UV index in Julian?
What is the UV index intensity in December in Julian?
Average temperature in December
Julian, PA
- Average high temperature in December: 36.9°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 (31.1°F).
- Average low temperature in December: 26.4°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
Julian, 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
Julian, PA
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Julian, 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
Julian, PA
- Average rainfall in December: 2.52"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is November (2.01").
Average rainfall days in December
Julian, PA
- Average rainfall days in December: 12.6 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (9.8 days).
Average snowfall in December
Julian, PA
- Average snowfall in December: 4.45"
The month with the highest snowfall is February (6.77").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Julian, PA
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Julian, 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 36min).
Average sunshine days in December
Julian, PA
- Average sunshine days in December: 12 days
The month with the most sunshine days is November (14.5 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in December
Julian, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Julian, PA
- Average cloud cover in December: 61
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
Julian, 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).
Julian, Pennsylvania, USA
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