December weather forecast
Walkers Mill, PA

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Weather in December

The first month of the winter, December, is still a cold month in Walkers Mill, Pennsylvania, with temperature in the range of an average low of 28.4°F (-2°C) and an average high of 39.7°F (4.3°C).

Temperature

The average high-temperature decreases in December, shifting from a chilly 49.3°F (9.6°C) in November to a wintry 39.7°F (4.3°C). December is noted for a mean low-temperature of 28.4°F (-2°C).

Humidity

The average relative humidity in December is 83%.

Rainfall

In Walkers Mill, in December, during 8.2 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. Throughout the year, in Walkers Mill, there are 132.6 rainfall days, and 11.5" (292mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Walkers Mill, during December, snow falls for 6.4 days and regularly aggregates up to 0.59" (15mm) of snow. In Walkers Mill, during the entire year, snow falls for 32.5 days and aggregates up to 3.66" (93mm) of snow.

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 7:24 am and sunset at 4:54 pm. On the last day of December, sunrise is at 7:43 am and sunset at 5:04 pm EST.

Sunshine

In Walkers Mill, the average sunshine in December is 3.4h.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: An average maximum UV index of 1 in December leads to these recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Experience reduced UV exposure by about half when donning a wide-brim hat. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Updated: Jul 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

An average high-temperature, in December, in Walkers Mill, is 39.7°F (4.3°C) and the average low-temperature is 28.4°F (-2°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 83%.

How many days does it rain in December?

In Walkers Mill, during December, the rain falls for 8.2 days and regularly aggregates up to 0.87" (22mm) of precipitation.

How many days does it snow in December in Walkers Mill?

In Walkers Mill, in December, snow falls for 6.4 days, with typically accumulated 0.59" (15mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

In Walkers Mill, the average day length in December is 9h and 21min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:04 pm EST.

How many hours of sunshine does Walkers Mill have in December?

In December, the average sunshine duration is 3.4h.

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.

What is the UV index intensity in December?

The average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes 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
Walkers Mill, PA

Average temperature in December - Walkers Mill, PA
  • Average high temperature in December: 39.7°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 28.4°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).

Average pressure in December
Walkers Mill, PA

Average pressure in December - Walkers Mill, 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 (29.95"Hg).

Average wind speed in December
Walkers Mill, PA

Average wind speed in December - Walkers Mill, PA
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).

Average humidity in December
Walkers Mill, PA

Average humidity in December - Walkers Mill, PA
  • Average humidity in December: 83%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are July and August (75%).

Average rainfall in December
Walkers Mill, PA

Average rainfall in December - Walkers Mill, PA
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is November (0.67").

Average rainfall days in December
Walkers Mill, PA

Average rainfall days in December - Walkers Mill, PA
  • Average rainfall days in December: 8.2 days

The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is February (6.4 days).

Average snowfall in December
Walkers Mill, PA

Average snowfall in December - Walkers Mill, PA
  • Average snowfall in December: 0.59"

The month with the highest snowfall is February (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Walkers Mill, PA

Average snowfall days in December - Walkers Mill, PA
  • Average snowfall days in December: 6.4 days

The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Walkers Mill, PA

Average daylight in December / Average sunshine in December - Walkers Mill, 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 month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in December
Walkers Mill, PA

Average sunshine days in December - Walkers Mill, PA
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.2 days).

Average UV index in December
Walkers Mill, PA

Average UV index in December - Walkers Mill, PA
  • Average UV index in December: 1

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Walkers Mill, PA

Average cloud cover in December - Walkers Mill, PA
  • Average cloud cover in December: 64

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in December
Walkers Mill, PA

Average visibility in December - Walkers Mill, PA
  • Average visibility in December: 5mi

The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).

Walkers Mill, Pennsylvania, USA

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