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 indicates a minor shift in the average high-temperature, from November's chilly 49.5°F (9.7°C) to an icy 40.5°F (4.7°C). In Mount Aetna, the average nighttime temperature during December is a subzero cold 29.3°F (-1.5°C).Humidity
The average relative humidity in December is 80%.Rainfall
In Mount Aetna, in December, it is raining for 11.5 days, with typically 2.72" (69mm) of accumulated precipitation. Throughout the year, in Mount Aetna, there are 168.8 rainfall days, and 33.27" (845mm) of precipitation is accumulated.Snowfall
Months with snowfall in Mount Aetna, Pennsylvania, are January through May, October through December. In Mount Aetna, in December, during 5.4 snowfall days, 1.97" (50mm) of snow is typically accumulated. In Mount Aetna, during the entire year, snow falls for 29.6 days and aggregates up to 15.59" (396mm) of snow.Daylight
The month with the shortest days in Mount Aetna is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:09 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:48 pm EST.
Sunshine
The average sunshine in December in Mount Aetna is 4.6h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mount Aetna. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 2 during December translates into these guidelines:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold is it in Mount Aetna in December?
What is the average humidity in December in Mount Aetna?
How many days does it rain in December in Mount Aetna?
How much does it snow in Mount Aetna in December?
What is the month with the shortest days in Mount Aetna?
How many hours of daylight does Mount Aetna have in December?
When are sunrise and sunset in December in Mount Aetna?
How many hours of sunshine does Mount Aetna have in December?
What is the month with the lowest UV index in Mount Aetna?
What is the UV index reading in December in Mount Aetna?
Average temperature in December
Mount Aetna, PA
- Average high temperature in December: 40.5°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in December
Mount Aetna, 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
Mount Aetna, PA
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Mount Aetna, PA
- Average humidity in December: 80%
The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Mount Aetna, PA
- Average rainfall in December: 2.72"
The wettest month (with the highest rainfall) is August (3.39").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in December
Mount Aetna, PA
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
Mount Aetna, PA
- Average snowfall in December: 1.97"
The month with the highest snowfall is March (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mount Aetna, PA
- Average snowfall days in December: 5.4 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Aetna, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Mount Aetna, PA
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in December
Mount Aetna, PA
- Average UV index in December: 2
The month with the highest UV index is June (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
Mount Aetna, PA
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Mount Aetna, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, June, July, November and December (6mi).
The months with the lowest visibility are February, May, August, September and October (5mi).
Mount Aetna, Pennsylvania, USA
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