December weather forecast
Shippingport, PA

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Weather in December

December, the first month of the winter in Shippingport, is also a wintry month, with an average temperature varying between 27.5°F (-2.5°C) and 38.7°F (3.7°C).

Temperature

As November transitions into December, Shippingport sees a drop in the average high-temperature, transitioning from a frosty 48.6°F (9.2°C) to a wintry 38.7°F (3.7°C). In Shippingport, the average temperature during the nights of December drops to a freezing cold 27.5°F (-2.5°C).

Humidity

In December, the average relative humidity is 84%.

Rainfall

In Shippingport, during December, the rain falls for 10.2 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Shippingport, during the entire year, the rain falls for 169.1 days and collects up to 31.46" (799mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Shippingport, during December, snow falls for 8.5 days and regularly aggregates up to 3.19" (81mm) of snow. In Shippingport, Pennsylvania, during the entire year, snow falls for 45.2 days and aggregates up to 15.71" (399mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year in Shippingport.
On the first day of December in Shippingport, sunrise is at 7:26 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 5:04 pm EST.

Sunshine

The average sunshine in December in Shippingport is 3.3h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index in Shippingport, Pennsylvania. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 1 in December transforms into the following instructions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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Frequently asked questions

How cold is it in Shippingport in December?

The high-temperature, in December, in Shippingport, records 38.7°F (3.7°C), while the low-temperature is 27.5°F (-2.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in August is estimated at 87.8°F (31°C).

What is the average humidity in December in Shippingport?

In Shippingport, the average relative humidity in December is 84%.

How much does it rain in Shippingport in December?

In Shippingport, during December, the rain falls for 10.2 days and regularly aggregates up to 2.44" (62mm) of precipitation.

How many days does it snow in December in Shippingport?

In December, it is snowing for 8.5 days. Throughout December, 3.19" (81mm) of snow is accumulated.

What is the month with the shortest days in Shippingport?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Shippingport have in December?

The average day length in December is 9h and 19min.

When are sunrise and sunset in December in Shippingport?

On the first day of December in Shippingport, Pennsylvania, sunrise is at 7:26 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 5:04 pm EST.

How many hours of sunshine does Shippingport have in December?

In December, the average sunshine duration is 3.3h.

What is the month with the lowest UV index in Shippingport?

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

What is the UV index reading in December in Shippingport?

In December, the average daily maximum UV index in Shippingport is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
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
Shippingport, PA

Average temperature in December - Shippingport, PA
  • Average high temperature in December: 38.7°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in December: 27.5°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in December
Shippingport, PA

Average pressure in December - Shippingport, 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 (29.94"Hg).

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Average wind speed in December
Shippingport, PA

Average wind speed in December - Shippingport, 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).

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Average humidity in December
Shippingport, PA

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

The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, July and August (77%).

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Average rainfall in December
Shippingport, PA

Average rainfall in December - Shippingport, PA
  • Average rainfall in December: 2.44"

The wettest month (with the highest rainfall) is July (3.43").
The driest months (with the least rainfall) are January and November (1.93").

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Average rainfall days in December
Shippingport, PA

Average rainfall days in December - Shippingport, PA
  • Average rainfall days in December: 10.2 days

The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is February (9.2 days).

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Average snowfall in December
Shippingport, PA

Average snowfall in December - Shippingport, PA
  • Average snowfall in December: 3.19"

The month with the highest snowfall is January (3.94").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Shippingport, PA

Average snowfall days in December - Shippingport, PA
  • Average snowfall days in December: 8.5 days

The month with the highest number of snowfall days is January (13.2 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
Shippingport, PA

Average daylight in December / Average sunshine in December - Shippingport, 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 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).

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Average sunshine days in December
Shippingport, PA

Average sunshine days in December - Shippingport, PA
  • Average sunshine days in December: 14.5 days

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is July (9 days).

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Average UV index in December
Shippingport, PA

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

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

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Average cloud cover in December
Shippingport, PA

Average cloud cover in December - Shippingport, PA
  • Average cloud cover in December: 65

The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in December
Shippingport, PA

Average visibility in December - Shippingport, 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 and February (4mi).

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Shippingport, Pennsylvania, USA

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