December weather forecast
Weatherly, PA

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Weather in December

December, the first month of the winter in Weatherly, is still a cold month, with an average temperature ranging between min 26.6°F (-3°C) and max 37.2°F (2.9°C).

Temperature

Weatherly's December weather shows a moderate shift in high-temperatures, falling from November's frosty 46.6°F (8.1°C) to a wintry 37.2°F (2.9°C). December brings with it a nighttime average temperature of 26.6°F (-3°C) in Weatherly, Pennsylvania.

Humidity

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

Rainfall

In Weatherly, in December, during 11.3 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. Throughout the year, there are 154.6 rainfall days, and 29.45" (748mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Weatherly, in December, snow falls for 7.7 days, with typically accumulated 3.62" (92mm) of snow. In Weatherly, during the entire year, snow falls for 46.2 days and aggregates up to 24.92" (633mm) of snow.

Daylight

The month with the shortest days in Weatherly is December, with an average of 9h and 18min of daylight.
On the first day of December in Weatherly, sunrise is at 7:09 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:45 pm EST.

Sunshine

In December, the average sunshine is 4.2h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Stay sun-safe with clothing that is both closely woven and worn loosely. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.

Frequently asked questions

How cold is December?

In December, the average high-temperature and low-temperature in Weatherly are 37.2°F (2.9°C) and 26.6°F (-3°C) respectively. In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is estimated at 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 83%.

How many days does it rain in December?

In Weatherly, during December, the rain falls for 11.3 days and regularly aggregates up to 2.4" (61mm) of precipitation.

How much does it snow in December?

In Weatherly, in December, during 7.7 snowfall days, 3.62" (92mm) 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.

How many hours of daylight does Weatherly have in December?

In Weatherly, Pennsylvania, the average day length in December is 9h and 17min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:09 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:45 pm EST.

How many hours of sunshine does Weatherly have in December?

In December, the average sunshine duration is 4.2h.

When is the lowest UV index?

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

What is the UV index intensity in December?

The average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe 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
Weatherly, PA

Average temperature in December - Weatherly, PA
  • Average high temperature in December: 37.2°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in December: 26.6°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (19°F).

Average pressure in December
Weatherly, PA

Average pressure in December - Weatherly, PA
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Weatherly, PA

Average wind speed in December - Weatherly, PA
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in December
Weatherly, PA

Average humidity in December - Weatherly, PA
  • Average humidity in December: 83%

The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are April and July (78%).

Average rainfall in December
Weatherly, PA

Average rainfall in December - Weatherly, PA
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is September (1.81").

Average rainfall days in December
Weatherly, PA

Average rainfall days in December - Weatherly, PA
  • Average rainfall days in December: 11.3 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (7.4 days).

Average snowfall in December
Weatherly, PA

Average snowfall in December - Weatherly, PA
  • Average snowfall in December: 3.62"

The month with the highest snowfall is January (6.42").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Weatherly, PA

Average snowfall days in December - Weatherly, PA
  • Average snowfall days in December: 7.7 days

The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Weatherly, 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 1min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).

Average sunshine days in December
Weatherly, PA

Average sunshine days in December - Weatherly, PA
  • Average sunshine days in December: 15 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (10.8 days).

Average UV index in December
Weatherly, PA

Average UV index in December - Weatherly, 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).

Average cloud cover in December
Weatherly, PA

Average cloud cover in December - Weatherly, PA
  • Average cloud cover in December: 57

The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 36).

Average visibility in December
Weatherly, PA

Average visibility in December - Weatherly, 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).

Weatherly, Pennsylvania, USA

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