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
Alta Manor, Pennsylvania, observes a minor decrease in the average high-temperature with the arrival of December, falling from November's chilly 46.6°F (8.1°C) to a wintry 36.9°F (2.7°C). Alta Manor, in December, experiences an average temperature of 26.6°F (-3°C) at night.Humidity
The average relative humidity in December in Alta Manor is 84%.Rainfall
In Alta Manor, in December, it is raining for 12.3 days, with typically 2.17" (55mm) of accumulated precipitation. Throughout the year, in Alta Manor, there are 165 rainfall days, and 25.31" (643mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Alta Manor, Pennsylvania, during December, snow falls for 11.1 days and regularly aggregates up to 3.5" (89mm) of snow. In Alta Manor, during the entire year, snow falls for 58.4 days and aggregates up to 20.59" (523mm) of snow.Daylight
The month with the shortest days in Alta Manor is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:18 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:36 am and sunset at 4:56 pm EST.
Sunshine
In December, the average sunshine is 3.7h.UV index
The month with the lowest UV index in Alta Manor is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 1 during December leads to these advisories:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
How cold is December in Alta Manor?
What is the average humidity in December in Alta Manor?
How much does it rain in Alta Manor in December?
How much does it snow in Alta Manor in December?
What is the month with the shortest days in Alta Manor?
What is the average length of the day in December in Alta Manor?
What time are sunrise and sunset in December in Alta Manor?
How long on average sun shines in December in Alta Manor?
What is the month with the lowest UV index in Alta Manor?
What is the UV index reading in December in Alta Manor?
Average temperature in December
Alta Manor, PA
- Average high temperature in December: 36.9°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 26.6°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 (19.4°F).
Average pressure in December
Alta Manor, PA
- Average pressure in December: 30.1"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
Alta Manor, PA
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Alta Manor, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in December
Alta Manor, PA
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is November (1.57").
Average rainfall days in December
Alta Manor, PA
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (9.8 days).
Average snowfall in December
Alta Manor, PA
- Average snowfall in December: 3.5"
The month with the highest snowfall is January (5.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Alta Manor, PA
- Average snowfall days in December: 11.1 days
The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Alta Manor, 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: 3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Alta Manor, PA
- Average sunshine days in December: 11.7 days
The month with the most sunshine days is November (15.3 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in December
Alta Manor, 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
Alta Manor, PA
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
Alta Manor, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Alta Manor, Pennsylvania, USA
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