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 onset of December is marked by a decrease in temperature, transitioning from a frosty 47.3°F (8.5°C) in November to a wintry 37.8°F (3.2°C). In West Sunbury, December's nights observe an average temperature dip to a subzero cold 26.4°F (-3.1°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In West Sunbury, during December, the rain falls for 10.4 days and regularly aggregates up to 2.87" (73mm) of precipitation. Throughout the year, there are 177.9 rainfall days, and 37.56" (954mm) of precipitation is accumulated.Snowfall
Months with snowfall in West Sunbury are January through May, October through December. In West Sunbury, in December, during 15.6 snowfall days, 5.67" (144mm) of snow is typically accumulated. Throughout the year, in West Sunbury, there are 72.7 snowfall days, and 31.93" (811mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December in West Sunbury, sunrise is at 7:25 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 5:01 pm EST.
Sunshine
In December, the average sunshine is 2.8h.UV index
The months with the lowest UV index in West Sunbury, Pennsylvania, are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 1 in December leads to these recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. When the Sun is at its strongest around midday, find shade and limit exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
How cold is December in West Sunbury?
What is the average humidity in December in West Sunbury?
How many days does it rain in December in West Sunbury?
How much does it snow in West Sunbury in December?
What is the month with the shortest days in West Sunbury?
How many hours of daylight does West Sunbury have in December?
When is the sunrise / sunset in December in West Sunbury?
How many hours of sunshine does West Sunbury have in December?
What is the month with the lowest UV index in West Sunbury?
What is the UV index intensity in December in West Sunbury?
Average temperature in December
West Sunbury, PA
- Average high temperature in December: 37.8°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
West Sunbury, 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 (29.94"Hg).
Average wind speed in December
West Sunbury, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.1mph).
Average humidity in December
West Sunbury, PA
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April, July and August (78%).
Average rainfall in December
West Sunbury, PA
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is April (3.9").
The driest month (with the least rainfall) is November (2.36").
Average rainfall days in December
West Sunbury, PA
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in December
West Sunbury, PA
- Average snowfall in December: 5.67"
The month with the highest snowfall is January (8.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
West Sunbury, PA
- Average snowfall days in December: 15.6 days
The month with the highest number of snowfall days is January (18.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
West Sunbury, 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: 2h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
West Sunbury, PA
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is November (13.8 days).
The month with the least sunshine days is February (7.1 days).
Average UV index in December
West Sunbury, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
West Sunbury, PA
- Average cloud cover in December: 71
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
West Sunbury, PA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
West Sunbury, Pennsylvania, USA
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