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
Welcoming December, Wetherill Junction observes a shift in the average high-temperature, falling from November's frosty 47.5°F (8.6°C) to a wintry 37.9°F (3.3°C). Wetherill Junction's nights in December cool down to an average low-temperature of 27.5°F (-2.5°C).Humidity
The average relative humidity in December is 82%.Rainfall
In Wetherill Junction, in December, it is raining for 12.8 days, with typically 2.8" (71mm) of accumulated precipitation. In Wetherill Junction, during the entire year, the rain falls for 169.3 days and collects up to 33.58" (853mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Wetherill Junction, in December, snow falls for 8.5 days, with typically accumulated 4.06" (103mm) of snow. Throughout the year, there are 48.3 snowfall days, and 27.56" (700mm) 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, sunrise is at 7:10 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:47 pm EST.
Sunshine
In Wetherill Junction, the average sunshine in December is 4.4h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Wetherill Junction, PA
- Average high temperature in December: 37.9°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Wetherill Junction, 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
Wetherill Junction, PA
- Average wind speed in December: 7.7mph
The windiest months (with the highest average wind speed) are March and April (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Wetherill Junction, PA
- Average humidity in December: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Wetherill Junction, PA
- Average rainfall in December: 2.8"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in December
Wetherill Junction, PA
- Average rainfall days in December: 12.8 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is January (9.9 days).
Average snowfall in December
Wetherill Junction, PA
- Average snowfall in December: 4.06"
The month with the highest snowfall is January (6.93").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Wetherill Junction, PA
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is February (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Wetherill Junction, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 18min).
Average sunshine days in December
Wetherill Junction, PA
- Average sunshine days in December: 13.7 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is May (9.7 days).
Average UV index in December
Wetherill Junction, PA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Wetherill Junction, PA
- Average cloud cover in December: 54
The months with the most cloud cover are February and December (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Wetherill Junction, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Wetherill Junction, Pennsylvania, USA
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