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 shift to December brings a decrease in the average high-temperature, falling from a fresh 51.1°F (10.6°C) in November to a cold 42.1°F (5.6°C). Seven Valleys, in December, experiences an average temperature of 30°F (-1.1°C) at night.Humidity
In Seven Valleys, Pennsylvania, the average relative humidity in December is 79%.Rainfall
In December, the rain falls for 8.1 days. Throughout December, 0.75" (19mm) of precipitation is accumulated. In Seven Valleys, during the entire year, the rain falls for 124 days and collects up to 11.85" (301mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Seven Valleys, in December, during 3.4 snowfall days, 0.55" (14mm) of snow is typically accumulated. In Seven Valleys, during the entire year, snow falls for 18.1 days and aggregates up to 3.27" (83mm) of snow.Daylight
December has the shortest days of the year in Seven Valleys, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:09 am and sunset at 4:42 pm. On the last day of December, in Seven Valleys, sunrise is at 7:28 am and sunset at 4:52 pm EST.
Sunshine
In December, the average sunshine is 5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
Is it cold in Seven Valleys during December?
What is the average humidity in December in Seven Valleys?
How many days does it rain in December in Seven Valleys?
How many days does it snow in December in Seven Valleys?
What is the month with the shortest days in Seven Valleys?
How many hours of daylight does Seven Valleys have in December?
What time are sunrise and sunset in December in Seven Valleys?
How long on average sun shines in December in Seven Valleys?
What is the month with the lowest UV index in Seven Valleys?
What is the UV index intensity in December in Seven Valleys?
Average temperature in December
Seven Valleys, PA
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in December: 30°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in December
Seven Valleys, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Seven Valleys, PA
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Seven Valleys, PA
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Seven Valleys, PA
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (1.38").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in December
Seven Valleys, PA
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in December
Seven Valleys, PA
- Average snowfall in December: 0.55"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Seven Valleys, PA
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Seven Valleys, 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 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Seven Valleys, PA
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is May (13.2 days).
Average UV index in December
Seven Valleys, PA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Seven Valleys, PA
- Average cloud cover in December: 47
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Seven Valleys, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Seven Valleys, Pennsylvania, USA
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