December weather forecast
Pattersonville, PA

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Weather in December

The first month of the winter, December, is still a cold month in Pattersonville, Pennsylvania, with temperature in the range of an average low of 27.5°F (-2.5°C) and an average high of 38.1°F (3.4°C).

Temperature

In Pattersonville, entering December brings a temperature decrement, reducing from November's chilly 47.5°F (8.6°C) to a cold 38.1°F (3.4°C). Pattersonville registers a consistent average low-temperature of 27.5°F (-2.5°C) during December.

Humidity

In December, the average relative humidity is 82%.

Rainfall

In Pattersonville, in December, during 11.9 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Pattersonville, during the entire year, the rain falls for 159.6 days and collects up to 29.41" (747mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Pattersonville, during December, snow falls for 8.7 days and regularly aggregates up to 3.54" (90mm) of snow. Throughout the year, there are 48.2 snowfall days, and 24.84" (631mm) 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 December, sunrise is at 7:10 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:47 pm EST.

Sunshine

The average sunshine in December is 4.4h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Updated: Jul 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

The average high-temperature, in December, in Pattersonville, is 38.1°F (3.4°C), while the average low-temperature is 27.5°F (-2.5°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, in July is evaluated at 86°F (30°C).

What is the average humidity in December in Pattersonville?

In Pattersonville, the average relative humidity in December is 82%.

How many days does it rain in December?

In December, the rain falls for 11.9 days. Throughout December, 2.28" (58mm) of precipitation is accumulated.

How much does it snow in December?

In Pattersonville, in December, during 8.7 snowfall days, 3.54" (90mm) of snow is typically accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

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

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:10 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:47 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 4.4h.

What are the months with the lowest UV index?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index intensity in December?

In Pattersonville, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to 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
Pattersonville, PA

Average temperature in December - Pattersonville, PA
  • Average high temperature in December: 38.1°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in December: 27.5°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure in December
Pattersonville, PA

Average pressure in December - Pattersonville, PA
  • Average pressure in December: 30.09"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).

Average wind speed in December
Pattersonville, PA

Average wind speed in December - Pattersonville, PA
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Pattersonville, PA

Average humidity in December - Pattersonville, PA
  • Average humidity in December: 82%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).

Average rainfall in December
Pattersonville, PA

Average rainfall in December - Pattersonville, PA
  • Average rainfall in December: 2.28"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in December
Pattersonville, PA

Average rainfall days in December - Pattersonville, PA
  • Average rainfall days in December: 11.9 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (8.9 days).

Average snowfall in December
Pattersonville, PA

Average snowfall in December - Pattersonville, PA
  • Average snowfall in December: 3.54"

The month with the highest snowfall is January (5.98").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Pattersonville, PA

Average snowfall days in December - Pattersonville, PA
  • Average snowfall days in December: 8.7 days

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Pattersonville, 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: 4h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

Average sunshine days in December
Pattersonville, PA

Average sunshine days in December - Pattersonville, PA
  • Average sunshine days in December: 14.6 days

The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is February (10.3 days).

Average UV index in December
Pattersonville, PA

Average UV index in December - Pattersonville, PA
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in December
Pattersonville, PA

Average cloud cover in December - Pattersonville, PA
  • Average cloud cover in December: 55

The months with the most cloud cover are February and December (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in December
Pattersonville, PA

Average visibility in December - Pattersonville, 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).

Pattersonville, Pennsylvania, USA

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