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
As Eighty Four enters December, the average high-temperature decreases from the a frosty 49.1°F (9.5°C) of November to a wintry 40.1°F (4.5°C). The nighttime temperature in Eighty Four, during December, averages of 28.6°F (-1.9°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In December, in Eighty Four, the rain falls for 7.5 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. In Eighty Four, during the entire year, the rain falls for 120.6 days and collects up to 9.49" (241mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. In Eighty Four, in December, snow falls for 5.5 days, with typically accumulated 0.43" (11mm) of snow. In Eighty Four, during the entire year, snow falls for 28.5 days and aggregates up to 2.95" (75mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:24 am and sunset at 4:55 pm. On the last day of December, sunrise is at 7:42 am and sunset at 5:04 pm EST.
Sunshine
In December, the average sunshine is 3.5h.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 value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during 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 intensity in December?
Average temperature in December
Eighty Four, PA
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Eighty Four, 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 (29.95"Hg).
Average wind speed in December
Eighty Four, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Eighty Four, PA
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (76%).
Average rainfall in December
Eighty Four, PA
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is July (1.06").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in December
Eighty Four, PA
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (14 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Eighty Four, PA
- Average snowfall in December: 0.43"
The months with the highest snowfall are January and February (0.79").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Eighty Four, PA
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Eighty Four, 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: 3h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Eighty Four, PA
- Average sunshine days in December: 19.6 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in December
Eighty Four, 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, March, November and December (UV index 2).
Average cloud cover in December
Eighty Four, PA
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Eighty Four, PA
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Eighty Four, Pennsylvania, USA
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