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
December's onset brings a slight change in high-temperatures, falling from a chilly 44.6°F (7°C) in November to a cold 35.2°F (1.8°C). In the month of December, the temperature in Slate Run generally rests at an average low of 25°F (-3.9°C).Humidity
In Slate Run, the average relative humidity in December is 85%.Rainfall
In Slate Run, Pennsylvania, in December, it is raining for 11.3 days, with typically 2.8" (71mm) of accumulated precipitation. Throughout the year, there are 168.8 rainfall days, and 32.56" (827mm) of precipitation is accumulated.Snowfall
Months with snowfall in Slate Run are January through May, October through December. In Slate Run, during December, snow falls for 14.4 days and regularly aggregates up to 6.3" (160mm) of snow. Throughout the year, there are 71.6 snowfall days, and 35.47" (901mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Slate Run, Pennsylvania.On the first day of December in Slate Run, sunrise is at 7:17 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:50 pm EST.
Sunshine
The months with the least sunshine are January and December, with an average of 3h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 1 during December translates into the following directions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Slate Run?
What is the average humidity in December in Slate Run?
How much does it rain in Slate Run in December?
How much does it snow in Slate Run in December?
What is the month with the shortest days in Slate Run?
How many hours of daylight does Slate Run have in December?
What time are sunrise and sunset in December in Slate Run?
What is the month with the least sunshine in Slate Run?
How many hours of sunshine does Slate Run have in December?
When is the lowest UV index in Slate Run?
What is the UV index intensity in December in Slate Run?
Average temperature in December
Slate Run, PA
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in December: 25°F
The month with the highest average low temperature is July (57.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Slate Run, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Slate Run, 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 (5.2mph).
Average humidity in December
Slate Run, PA
- Average humidity in December: 85%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (77%).
Average rainfall in December
Slate Run, PA
- Average rainfall in December: 2.8"
The wettest month (with the highest rainfall) is April (3.7").
The driest month (with the least rainfall) is November (2.13").
Average rainfall days in December
Slate Run, PA
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (8.4 days).
Average snowfall in December
Slate Run, PA
- Average snowfall in December: 6.3"
The month with the highest snowfall is February (9.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Slate Run, PA
- Average snowfall days in December: 14.4 days
The month with the highest number of snowfall days is January (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Slate Run, PA
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The months with the least sunshine are January and December (Average sunshine: 3h and 0min).
Average sunshine days in December
Slate Run, PA
- Average sunshine days in December: 10 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (7.9 days).
Average UV index in December
Slate 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 months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Slate Run, PA
- Average cloud cover in December: 69
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 41).
Average visibility in December
Slate Run, PA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July and November (5mi).
The months with the lowest visibility are January, February, August, September, October and December (4mi).
Slate Run, Pennsylvania, USA
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