December weather forecastPenn Run, PA
December
Weather in December
The first month of the winter, December, is also an icy month in Penn Run, Pennsylvania, with an average temperature fluctuating between 27°F (-2.8°C) and 37.4°F (3°C).Temperature
December comes with a drop in the average high-temperature, falling from November's chilly 47.1°F (8.4°C) to a cold 37.4°F (3°C). Penn Run experiences an average temperature drop to a freezing cold 27°F (-2.8°C) during December nights.Humidity
In Penn Run, the average relative humidity in December is 85%.Rainfall
In Penn Run, during December, the rain falls for 11.9 days and regularly aggregates up to 2.76" (70mm) of precipitation. Throughout the year, there are 183.5 rainfall days, and 33.46" (850mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Penn Run. In Penn Run, during December, snow falls for 13.1 days and regularly aggregates up to 5.67" (144mm) of snow. In Penn Run, during the entire year, snow falls for 67.3 days and aggregates up to 28.62" (727mm) of snow.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 7:21 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:59 pm EST.
Sunshine
The average sunshine in December is 3.2h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 1 in December leads to these guidelines:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Penn Run, PA
- Average high temperature in December: 37.4°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 (31.3°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Penn Run, 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
Penn Run, PA
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Penn Run, PA
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, June, July and August (78%).
Average rainfall in December
Penn Run, PA
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is November (1.93").
Average rainfall days in December
Penn Run, PA
- Average rainfall days in December: 11.9 days
The month with the highest number of rainy days is May (21.5 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in December
Penn Run, PA
- Average snowfall in December: 5.67"
The month with the highest snowfall is January (7.05").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Penn Run, PA
- Average snowfall days in December: 13.1 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Penn Run, PA
- Average daylight in December: 9h and 18min
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: 3h and 12min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in December
Penn Run, PA
- Average sunshine days in December: 9.8 days
The month with the most sunshine days is November (13.3 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in December
Penn Run, 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
Penn Run, PA
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Penn Run, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
