December weather forecast
Lansdale, PA

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Weather in December

December, the first month of the winter in Lansdale, is still a cold month, with temperature in the range of an average low of 30.7°F (-0.7°C) and an average high of 42.1°F (5.6°C).

Temperature

With December's arrival, Lansdale's weather changes as the average high-temperature falls from a cool 51.3°F (10.7°C) in November to a wintry 42.1°F (5.6°C). Lansdale experiences a nighttime temperature average of 30.7°F (-0.7°C) during December.

Humidity

The months with the highest humidity are February, October and December, with an average relative humidity of 79%.

Rainfall

In Lansdale, Pennsylvania, in December, it is raining for 7.3 days, with typically 1.02" (26mm) of accumulated precipitation. Throughout the year, there are 116.6 rainfall days, and 10.63" (270mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall in Lansdale. In Lansdale, during December, snow falls for 1.8 days and regularly aggregates up to 0.43" (11mm) of snow. In Lansdale, during the entire year, snow falls for 14.8 days and aggregates up to 3.5" (89mm) 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 7:05 am and sunset at 4:35 pm. On the last day of December, in Lansdale, sunrise is at 7:23 am and sunset at 4:45 pm EST.

Sunshine

In December, the average sunshine is 5h.

UV index

January through March, 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 unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 2 in December transforms into the following instructions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Boost your sun resistance with garments that are densely woven yet spacious. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

How cold does it get in Lansdale in December?

In Lansdale, in December, the average high-temperature is 42.1°F (5.6°C), and the average low-temperature is 30.7°F (-0.7°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in August is evaluated at 87.8°F (31°C).

What is the most humid month in Lansdale?

February, October and December, with an average relative humidity of 79%, are most humid months in Lansdale.

What is the average humidity in December in Lansdale?

In Lansdale, Pennsylvania, the average relative humidity in December is 79%.

How many days does it rain in December in Lansdale?

In Lansdale, in December, it is raining for 7.3 days, with typically 1.02" (26mm) of accumulated precipitation.

How many days does it snow in December in Lansdale?

In Lansdale, in December, during 1.8 snowfall days, 0.43" (11mm) of snow is typically accumulated.

What is the month with the shortest days in Lansdale?

December has the shortest days of the year, with an average of 9h and 24min of daylight.

How many hours of daylight does Lansdale have in December?

In Lansdale, the average day length in December is 9h and 22min.

What time are sunrise and sunset in December in Lansdale?

On the first day of December, sunrise is at 7:05 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:45 pm EST.

How long on average sun shines in December in Lansdale?

In Lansdale, the average sunshine duration in December is 5h.

What is the month with the lowest UV index in Lansdale?

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

What is the UV index intensity in December in Lansdale?

In Lansdale, Pennsylvania, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents 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
Lansdale, PA

Average temperature in December - Lansdale, PA
  • Average high temperature in December: 42.1°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (35.6°F).

  • Average low temperature in December: 30.7°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).

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Average pressure in December
Lansdale, PA

Average pressure in December - Lansdale, 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).

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Average wind speed in December
Lansdale, PA

Average wind speed in December - Lansdale, PA
  • Average wind speed in December: 7.5mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in December
Lansdale, PA

Average humidity in December - Lansdale, PA
  • Average humidity in December: 79%

The months with the highest relative humidity are February, October and December (79%).
The months with the lowest relative humidity are April, July and August (73%).

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Average rainfall in December
Lansdale, PA

Average rainfall in December - Lansdale, PA
  • Average rainfall in December: 1.02"

The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is September (0.59").

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Average rainfall days in December
Lansdale, PA

Average rainfall days in December - Lansdale, PA
  • Average rainfall days in December: 7.3 days

The month with the highest number of rainy days is July (13.8 days).
The months with the least rainy days are January and February (6.3 days).

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Average snowfall in December
Lansdale, PA

Average snowfall in December - Lansdale, PA
  • Average snowfall in December: 0.43"

The month with the highest snowfall is March (1.02").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
Lansdale, PA

Average snowfall days in December - Lansdale, PA
  • Average snowfall days in December: 1.8 days

The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Lansdale, 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 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in December
Lansdale, PA

Average sunshine days in December - Lansdale, PA
  • Average sunshine days in December: 21.7 days

The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is July (13.9 days).

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Average UV index in December
Lansdale, PA

Average UV index in December - Lansdale, 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, March, November and December (UV index 2).

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Average cloud cover in December
Lansdale, PA

Average cloud cover in December - Lansdale, PA
  • Average cloud cover in December: 47

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in December
Lansdale, PA

Average visibility in December - Lansdale, PA
  • Average visibility in December: 6mi

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

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Lansdale, Pennsylvania, USA

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