December weather forecast
Dewey Corner, PA

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Weather in December

The first month of the winter, December, is still a cold month in Dewey Corner, Pennsylvania, with an average temperature fluctuating between 36.9°F (2.7°C) and 26.8°F (-2.9°C).

Temperature

As December begins, there is a decrease in the average high-temperature, falling from a frosty 46.6°F (8.1°C) in November to a cold 36.9°F (2.7°C). Throughout the December nights, Dewey Corner encounters a low-temperature of 26.8°F (-2.9°C).

Humidity

The average relative humidity in December is 83%.

Rainfall

In December, the rain falls for 11.5 days. Throughout December, 2.28" (58mm) of precipitation is accumulated. Throughout the year, there are 170.2 rainfall days, and 32.2" (818mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Dewey Corner, during December, snow falls for 8.2 days and regularly aggregates up to 3.23" (82mm) of snow. Throughout the year, there are 41.9 snowfall days, and 19.76" (502mm) 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 7:14 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:33 am and sunset at 4:48 pm EST.

Sunshine

In Dewey Corner, the average sunshine in December is 3.9h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.
Note: In December, the maximum UV index of 1 translates into these guidelines:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Frequently asked questions

How cold is it in December?

The high-temperature during December is 36.9°F (2.7°C) and the low-temperature is 26.8°F (-2.9°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 appraised at 87.8°F (31°C).

What is the average humidity in December?

In Dewey Corner, the average relative humidity in December is 83%.

How much does it rain in December?

In Dewey Corner, Pennsylvania, in December, during 11.5 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Dewey Corner, in December, during 8.2 snowfall days, 3.23" (82mm) of snow is typically accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

In December, the average day length is 9h and 15min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:14 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:48 pm EST.

How long on average sun shines in December in Dewey Corner?

The average sunshine duration in December is 3.9h.

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 Dewey Corner, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a low health threat 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
Dewey Corner, PA

Average temperature in December - Dewey Corner, PA
  • Average high temperature in December: 36.9°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.7°F).

  • Average low temperature in December: 26.8°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 (19°F).

Average pressure in December
Dewey Corner, PA

Average pressure in December - Dewey Corner, 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
Dewey Corner, PA

Average wind speed in December - Dewey Corner, PA
  • Average wind speed in December: 7.2mph

The windiest months (with the highest average wind speed) are January, March and April (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Dewey Corner, PA

Average humidity in December - Dewey Corner, PA
  • Average humidity in December: 83%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (77%).

Average rainfall in December
Dewey Corner, PA

Average rainfall in December - Dewey Corner, PA
  • Average rainfall in December: 2.28"

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

Average rainfall days in December
Dewey Corner, PA

Average rainfall days in December - Dewey Corner, PA
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is February (8.8 days).

Average snowfall in December
Dewey Corner, PA

Average snowfall in December - Dewey Corner, PA
  • Average snowfall in December: 3.23"

The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Dewey Corner, PA

Average snowfall days in December - Dewey Corner, PA
  • Average snowfall days in December: 8.2 days

The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Dewey Corner, PA

Average daylight in December / Average sunshine in December - Dewey Corner, 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).

Average sunshine days in December
Dewey Corner, PA

Average sunshine days in December - Dewey Corner, PA
  • Average sunshine days in December: 14.8 days

The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in December
Dewey Corner, PA

Average UV index in December - Dewey Corner, 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).

Average cloud cover in December
Dewey Corner, PA

Average cloud cover in December - Dewey Corner, PA
  • Average cloud cover in December: 59

The months with the most cloud cover are January, February and December (Cloud cover 59).
The month with the least cloud cover is July (Cloud cover 36).

Average visibility in December
Dewey Corner, PA

Average visibility in December - Dewey Corner, 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).

Dewey Corner, Pennsylvania, USA

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