December weather forecast
East Lansdowne, PA

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Weather in December

The first month of the winter, December, is still a chilly month in East Lansdowne, Pennsylvania, with an average temperature varying between 32.7°F (0.4°C) and 44.1°F (6.7°C).

Temperature

A moderate decline in average high-temperatures is noted in December, moving from a cool 52.7°F (11.5°C) in November to a chilly 44.1°F (6.7°C). Nighttime temperature lowers to an average of 32.7°F (0.4°C) in December.

Humidity

The months with the highest humidity are February, October and December, with an average relative humidity of 77%.

Rainfall

In East Lansdowne, in December, during 9.6 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. Throughout the year, in East Lansdowne, there are 142 rainfall days, and 24.41" (620mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In East Lansdowne, in December, snow falls for 1.5 days, with typically accumulated 0.75" (19mm) of snow. Throughout the year, there are 11.3 snowfall days, and 6.18" (157mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:04 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:46 pm EST.

Sunshine

The average sunshine in December is 5.1h.

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 of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 2 in December leads to these guidelines:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in East Lansdowne?

December temperatures vary between a high-temperature of 44.1°F (6.7°C) and a low-temperature of 32.7°F (0.4°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in August is appraised at 91.4°F (33°C).

What is the most humid month?

The months with the highest humidity are February, October and December, with an average relative humidity of 77%.

What is the average humidity in December?

In East Lansdowne, the average relative humidity in December is 77%.

How many days does it rain in December?

In East Lansdowne, in December, it is raining for 9.6 days, with typically 2.4" (61mm) of accumulated precipitation.

How much does it snow in December?

In December, it is snowing for 1.5 days. Throughout December, 0.75" (19mm) of snow is accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

In East Lansdowne, the average day length in December is 9h and 23min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:46 pm EST.

How many hours of sunshine does East Lansdowne have in December?

In East Lansdowne, the average sunshine duration in December is 5.1h.

What is the month with the lowest UV index?

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

What is the UV index reading in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk 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
East Lansdowne, PA

Average temperature in December - East Lansdowne, PA
  • Average high temperature in December: 44.1°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in December: 32.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

Average pressure in December
East Lansdowne, PA

Average pressure in December - East Lansdowne, 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
East Lansdowne, PA

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

The windiest months (with the highest average wind speed) are February, March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in December
East Lansdowne, PA

Average humidity in December - East Lansdowne, PA
  • Average humidity in December: 77%

The months with the highest relative humidity are February, October and December (77%).
The month with the lowest relative humidity is April (71%).

Average rainfall in December
East Lansdowne, PA

Average rainfall in December - East Lansdowne, PA
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is August (2.95").
The driest month (with the least rainfall) is January (1.46").

Average rainfall days in December
East Lansdowne, PA

Average rainfall days in December - East Lansdowne, PA
  • Average rainfall days in December: 9.6 days

The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is January (6.6 days).

Average snowfall in December
East Lansdowne, PA

Average snowfall in December - East Lansdowne, PA
  • Average snowfall in December: 0.75"

The month with the highest snowfall is March (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
East Lansdowne, PA

Average snowfall days in December - East Lansdowne, PA
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
East Lansdowne, PA

Average daylight in December / Average sunshine in December - East Lansdowne, 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 1min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in December
East Lansdowne, PA

Average sunshine days in December - East Lansdowne, PA
  • Average sunshine days in December: 19.7 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (12.1 days).

Average UV index in December
East Lansdowne, PA

Average UV index in December - East Lansdowne, 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
East Lansdowne, PA

Average cloud cover in December - East Lansdowne, PA
  • Average cloud cover in December: 46

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in December
East Lansdowne, PA

Average visibility in December - East Lansdowne, PA
  • Average visibility in December: 6mi

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

East Lansdowne, Pennsylvania, USA

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