December weather forecast
Aspinwall, PA

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Weather in December

The first month of the winter, December, is still a cold month in Aspinwall, Pennsylvania, with an average temperature fluctuating between 39.2°F (4°C) and 28.2°F (-2.1°C).

Temperature

In December, the meteorological conditions alter, with the average high-temperature shifting from a frosty 49.1°F (9.5°C) in November to a wintry 39.2°F (4°C). Throughout December, Aspinwall anticipates an average low-temperature of 28.2°F (-2.1°C).

Humidity

The average relative humidity in December is 84%.

Rainfall

In Aspinwall, during December, the rain falls for 12.4 days and regularly aggregates up to 2.91" (74mm) of precipitation. Throughout the year, there are 182.2 rainfall days, and 34.84" (885mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Aspinwall, in December, snow falls for 13 days, with typically accumulated 4.76" (121mm) of snow. Throughout the year, there are 62.9 snowfall days, and 25.51" (648mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:24 am and sunset at 4:53 pm. On the last day of December, sunrise is at 7:42 am and sunset at 5:03 pm EST.

Sunshine

In December, the average sunshine is 3.2h.

UV index

December is the month with the lowest UV index in Aspinwall, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health 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:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Updated: Jun 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

December temperatures in Aspinwall vary between a high-temperature of 39.2°F (4°C) and a low-temperature of 28.2°F (-2.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is appraised at 87.8°F (31°C).

What is the average humidity in December?

In December, the average relative humidity is 84%.

How many days does it rain in December?

In Aspinwall, during December, the rain falls for 12.4 days and regularly aggregates up to 2.91" (74mm) of precipitation.

How many days does it snow in December?

In December, it is snowing for 13 days. Throughout December, 4.76" (121mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 18min of daylight.

How many hours of daylight does Aspinwall have in December?

In December, the average day length is 9h and 20min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:24 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:03 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 3.2h.

What is the month with the lowest UV index?

The month with the lowest UV index is December, with an average maximum UV index of 1.

How high is the UV index in December?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Aspinwall, PA

Average temperature in December - Aspinwall, PA
  • Average high temperature in December: 39.2°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (32.9°F).

  • Average low temperature in December: 28.2°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
Aspinwall, PA

Average pressure in December - Aspinwall, PA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Aspinwall, PA

Average wind speed in December - Aspinwall, PA
  • Average wind speed in December: 7.5mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in December
Aspinwall, PA

Average humidity in December - Aspinwall, PA
  • Average humidity in December: 84%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are July and August (75%).

Average rainfall in December
Aspinwall, PA

Average rainfall in December - Aspinwall, PA
  • Average rainfall in December: 2.91"

The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is November (2.17").

Average rainfall days in December
Aspinwall, PA

Average rainfall days in December - Aspinwall, PA
  • Average rainfall days in December: 12.4 days

The month with the highest number of rainy days is May (21 days).
The month with the least rainy days is February (10.4 days).

Average snowfall in December
Aspinwall, PA

Average snowfall in December - Aspinwall, PA
  • Average snowfall in December: 4.76"

The month with the highest snowfall is January (6.42").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Aspinwall, PA

Average snowfall days in December - Aspinwall, PA
  • Average snowfall days in December: 13 days

The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Aspinwall, PA

Average daylight in December / Average sunshine in December - Aspinwall, 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 1min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).

Average sunshine days in December
Aspinwall, PA

Average sunshine days in December - Aspinwall, PA
  • Average sunshine days in December: 9.7 days

The month with the most sunshine days is November (14.8 days).
The month with the least sunshine days is January (7.4 days).

Average UV index in December
Aspinwall, PA

Average UV index in December - Aspinwall, PA
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Aspinwall, PA

Average cloud cover in December - Aspinwall, PA
  • Average cloud cover in December: 66

The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 34).

Average visibility in December
Aspinwall, PA

Average visibility in December - Aspinwall, PA
  • Average visibility in December: 5mi

The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January and February (4mi).

Aspinwall, Pennsylvania, USA

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