December weather forecast
Fairless Junction, PA

Share

Weather in December

The first month of the winter, December, is also a frosty month in Fairless Junction, Pennsylvania, with an average temperature ranging between min 32.4°F (0.2°C) and max 43.7°F (6.5°C).

Temperature

December's arrival aligns with a minor decrease in average high-temperatures, from November's cool 52.3°F (11.3°C) to a frosty 43.7°F (6.5°C). The nighttime temperature dips to a cold 32.4°F (0.2°C) on average during December.

Humidity

In December, the average relative humidity in Fairless Junction is 77%.

Rainfall

In Fairless Junction, in December, it is raining for 10.9 days, with typically 3.19" (81mm) of accumulated precipitation. Throughout the year, there are 154.4 rainfall days, and 31.38" (797mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Fairless Junction are January through May, November and December. In Fairless Junction, during December, snow falls for 2.8 days and regularly aggregates up to 1.22" (31mm) of snow. In Fairless Junction, during the entire year, snow falls for 15.9 days and aggregates up to 8.5" (216mm) of snow.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:03 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:43 pm EST.

Sunshine

In Fairless Junction, the average sunshine in December is 5h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Boost your sun resistance with garments that are densely woven yet spacious. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.

Frequently asked questions

How cold is December?

The high-temperature, in December, in Fairless Junction, is 43.7°F (6.5°C), while the low-temperature averages to 32.4°F (0.2°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is evaluated at 89.6°F (32°C).

What is the average humidity in December?

In Fairless Junction, the average relative humidity in December is 77%.

How much does it rain in December?

In Fairless Junction, during December, the rain falls for 10.9 days and regularly aggregates up to 3.19" (81mm) of precipitation.

How much does it snow in December?

In December, it is snowing for 2.8 days. Throughout December, 1.22" (31mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days in Fairless Junction is December, with an average of 9h and 24min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 22min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:03 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:43 pm EST.

How many hours of sunshine does Fairless Junction have in December?

The average sunshine duration in December is 5h.

What is the month with the lowest UV index in Fairless Junction?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health 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
Fairless Junction, PA

Average temperature in December - Fairless Junction, PA
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in December: 32.4°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure in December
Fairless Junction, PA

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

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Fairless Junction, PA

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

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in December
Fairless Junction, PA

Average humidity in December - Fairless Junction, PA
  • Average humidity in December: 77%

The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Fairless Junction, PA

Average rainfall in December - Fairless Junction, PA
  • Average rainfall in December: 3.19"

The wettest month (with the highest rainfall) is July (3.66").
The driest month (with the least rainfall) is January (1.89").

Average rainfall days in December
Fairless Junction, PA

Average rainfall days in December - Fairless Junction, PA
  • Average rainfall days in December: 10.9 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is January (8 days).

Average snowfall in December
Fairless Junction, PA

Average snowfall in December - Fairless Junction, PA
  • Average snowfall in December: 1.22"

The month with the highest snowfall is March (2.99").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Fairless Junction, PA

Average snowfall days in December - Fairless Junction, PA
  • Average snowfall days in December: 2.8 days

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Fairless Junction, PA

Average daylight in December / Average sunshine in December - Fairless Junction, 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 24min).

  • Average sunshine in December: 5h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in December
Fairless Junction, PA

Average sunshine days in December - Fairless Junction, PA
  • Average sunshine days in December: 18.1 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in December
Fairless Junction, PA

Average UV index in December - Fairless Junction, PA
  • Average UV index in December: 2

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

Average cloud cover in December
Fairless Junction, PA

Average cloud cover in December - Fairless Junction, PA
  • Average cloud cover in December: 46

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Fairless Junction, PA

Average visibility in December - Fairless Junction, PA
  • Average visibility in December: 6mi

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

Fairless Junction, Pennsylvania, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location