December weather forecast
Port Matilda, PA

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Weather in December

December, the first month of the winter in Port Matilda, is still a cold month, with an average temperature fluctuating between 25.9°F (-3.4°C) and 36.3°F (2.4°C).

Temperature

As Port Matilda enters December, the average high-temperature decreases from the a chilly 45.9°F (7.7°C) of November to a wintry 36.3°F (2.4°C). During the nights in December, the temperature averages to a subzero cold 25.9°F (-3.4°C).

Humidity

The average relative humidity in December is 84%.

Rainfall

In Port Matilda, in December, during 11.4 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, in Port Matilda, Pennsylvania, there are 159 rainfall days, and 23.46" (596mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In December, it is snowing for 13.8 days. Throughout December, 4.13" (105mm) of snow is accumulated. Throughout the year, there are 67.7 snowfall days, and 23.54" (598mm) of snow is accumulated.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:17 am and sunset at 4:45 pm. On the last day of December, sunrise is at 7:36 am and sunset at 4:54 pm EST.

Sunshine

The average sunshine in December in Port Matilda is 3.5h.

UV index

December is the month with the lowest UV index in Port Matilda, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In December, an average UV index of 1 transforms into the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
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Frequently asked questions

How cold is it in Port Matilda in December?

In December, in Port Matilda, the average high-temperature is 36.3°F (2.4°C), and the average low-temperature is 25.9°F (-3.4°C). In July, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is calculated to be 86°F (30°C).

What is the average humidity in December in Port Matilda?

The average relative humidity in December in Port Matilda, Pennsylvania, is 84%.

How much does it rain in Port Matilda in December?

In Port Matilda, Pennsylvania, in December, during 11.4 rainfall days, 1.57" (40mm) of precipitation is typically accumulated.

How many days does it snow in December in Port Matilda?

In December, in Port Matilda, Pennsylvania, it is snowing for 13.8 days. Throughout December, 4.13" (105mm) of snow is accumulated.

What is the month with the shortest days in Port Matilda?

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

How many hours of daylight does Port Matilda have in December?

The average day length in December in Port Matilda, Pennsylvania, is 9h and 19min.

When are sunrise and sunset in December in Port Matilda?

In December, on the first day of the month, sunrise is at 7:17 am and sunset at 4:45 pm. On the last day of the month, in Port Matilda, Pennsylvania, sunrise is at 7:36 am and sunset at 4:54 pm EST.

How many hours of sunshine does Port Matilda have in December?

The average sunshine duration in December in Port Matilda, Pennsylvania, is 3.5h.

What is the month with the lowest UV index in Port Matilda?

With an average maximum UV index of 1, December is the month with the lowest UV index in Port Matilda, Pennsylvania.

How high is the UV index in December in Port Matilda?

In December, the average daily maximum UV index in Port Matilda is 1. A UV Index reading of 2, and below, represents a low health risk from 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
Port Matilda, PA

Average temperature in December - Port Matilda, PA
  • Average high temperature in December: 36.3°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in December: 25.9°F

The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in December
Port Matilda, PA

Average pressure in December - Port Matilda, 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 (29.95"Hg).

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Average wind speed in December
Port Matilda, PA

Average wind speed in December - Port Matilda, PA
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in December
Port Matilda, PA

Average humidity in December - Port Matilda, PA
  • Average humidity in December: 84%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is July (76%).

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Average rainfall in December
Port Matilda, PA

Average rainfall in December - Port Matilda, PA
  • Average rainfall in December: 1.57"

The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is November (1.42").

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Average rainfall days in December
Port Matilda, PA

Average rainfall days in December - Port Matilda, PA
  • Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (8.1 days).

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Average snowfall in December
Port Matilda, PA

Average snowfall in December - Port Matilda, PA
  • Average snowfall in December: 4.13"

The month with the highest snowfall is January (6.02").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Port Matilda, PA

Average snowfall days in December - Port Matilda, PA
  • Average snowfall days in December: 13.8 days

The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Port Matilda, PA

Average daylight in December / Average sunshine in December - Port Matilda, PA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 3h and 3min

The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

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Average sunshine days in December
Port Matilda, PA

Average sunshine days in December - Port Matilda, PA
  • Average sunshine days in December: 10.5 days

The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is February (8.7 days).

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Average UV index in December
Port Matilda, PA

Average UV index in December - Port Matilda, 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).

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Average cloud cover in December
Port Matilda, PA

Average cloud cover in December - Port Matilda, PA
  • Average cloud cover in December: 64

The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 38).

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Average visibility in December
Port Matilda, PA

Average visibility in December - Port Matilda, PA
  • Average visibility in December: 5mi

The months with the highest visibility are January, March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February and September (4mi).

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Port Matilda, Pennsylvania, USA

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