December weather forecast
University Park, PA

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Weather in December

The first month of the winter, December, is also a wintry month in University Park, Pennsylvania, with an average temperature varying between 36.9°F (2.7°C) and 26.4°F (-3.1°C).

Temperature

University Park's progression into December involves a drop in the average high-temperature, receding from a frosty 46.8°F (8.2°C) in November to a wintry 36.9°F (2.7°C). Throughout December, University Park registers a consistent average low-temperature of 26.4°F (-3.1°C).

Humidity

February and December, with an average relative humidity of 84%, are the most humid months.

Rainfall

In December, in University Park, the rain falls for 12.6 days. Throughout December, 2.52" (64mm) of precipitation is accumulated. Throughout the year, there are 175.7 rainfall days, and 30.94" (786mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in University Park. In University Park, in December, during 11.5 snowfall days, 4.45" (113mm) of snow is typically accumulated. Throughout the year, there are 59 snowfall days, and 26.3" (668mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:17 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:53 pm EST.

Sunshine

In December, the average sunshine in University Park is 3.7h.

UV index

December is the month with the lowest UV index in University Park, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 1 during December leads to these instructions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

How cold is it in University Park in December?

In University Park, in December, the average high-temperature is 36.9°F (2.7°C), and the average low-temperature is 26.4°F (-3.1°C). The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in July is estimated at 87.8°F (31°C).

What are the most humid months in University Park?

February and December, with an average relative humidity of 84%, are most humid months.

What is the average humidity in December in University Park?

In December, the average relative humidity in University Park, Pennsylvania, is 84%.

How much does it rain in University Park in December?

In University Park, in December, it is raining for 12.6 days, with typically 2.52" (64mm) of accumulated precipitation.

How many days does it snow in December in University Park?

In University Park, in December, snow falls for 11.5 days, with typically accumulated 4.45" (113mm) of snow.

What is the month with the shortest days in University Park?

With an average of 9h and 18min of daylight, December has the shortest days of the year in University Park, Pennsylvania.

What is the average length of the day in December in University Park?

In December, the average day length in University Park is 9h and 18min.

What time are sunrise and sunset in December in University Park?

On the first day of December, sunrise is at 7:17 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:53 pm EST.

How long on average sun shines in December in University Park?

The average sunshine duration in December is 3.7h.

When is the lowest UV index in University Park?

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

How high is the UV index in December in University Park?

The average daily maximum UV index in December in University Park, Pennsylvania, is 1. A UV Index estimate 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
University Park, PA

Average temperature in December - University Park, PA
  • Average high temperature in December: 36.9°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 (31.1°F).

  • Average low temperature in December: 26.4°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 (18.7°F).

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Average pressure in December
University Park, PA

Average pressure in December - University Park, 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
University Park, PA

Average wind speed in December - University Park, PA
  • Average wind speed in December: 7.4mph

The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
University Park, PA

Average humidity in December - University Park, PA
  • Average humidity in December: 84%

The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is July (76%).

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Average rainfall in December
University Park, PA

Average rainfall in December - University Park, PA
  • Average rainfall in December: 2.52"

The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is November (2.01").

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Average rainfall days in December
University Park, PA

Average rainfall days in December - University Park, PA
  • Average rainfall days in December: 12.6 days

The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (9.8 days).

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Average snowfall in December
University Park, PA

Average snowfall in December - University Park, PA
  • Average snowfall in December: 4.45"

The month with the highest snowfall is February (6.77").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
University Park, PA

Average snowfall days in December - University Park, PA
  • Average snowfall days in December: 11.5 days

The month with the highest number of snowfall days is January (15.3 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
University Park, PA

Average daylight in December / Average sunshine in December - University Park, 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 4min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in December
University Park, PA

Average sunshine days in December - University Park, PA
  • Average sunshine days in December: 12 days

The month with the most sunshine days is November (14.5 days).
The month with the least sunshine days is February (8.5 days).

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Average UV index in December
University Park, PA

Average UV index in December - University Park, 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
University Park, PA

Average cloud cover in December - University Park, PA
  • Average cloud cover in December: 61

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 36).

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Average visibility in December
University Park, PA

Average visibility in December - University Park, PA
  • Average visibility in December: 5mi

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

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University Park, Pennsylvania, USA

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