December weather forecast
West Conshohocken, PA

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Weather in December

The first month of the winter, December, is also an icy month in West Conshohocken, Pennsylvania, with an average temperature varying between 30.9°F (-0.6°C) and 42.6°F (5.9°C).

Temperature

Start of December brings a shift in the average high-temperature, falling from November's fresh 51.6°F (10.9°C) to a cold 42.6°F (5.9°C). West Conshohocken's average low-temperature in the month of December is recorded at a freezing cold 30.9°F (-0.6°C).

Humidity

In December, the average relative humidity is 78%.

Rainfall

In December, the rain falls for 8.6 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. In West Conshohocken, during the entire year, the rain falls for 138.2 days and collects up to 15.59" (396mm) of precipitation.

Snowfall

Months with snowfall in West Conshohocken, Pennsylvania, are January through March, May and December. December is the first month it typically snows. Throughout December, in the average 2.6 snowfall days, it receives 0.35" (9mm) of snow. In West Conshohocken, during the entire year, snow falls for 15.8 days and aggregates up to 2.13" (54mm) of snow.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year in West Conshohocken, Pennsylvania.
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, in West Conshohocken, sunrise is at 7:23 am and sunset at 4:45 pm EST.

Sunshine

The average sunshine in December in West Conshohocken, Pennsylvania, is 5h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 2 in December transforms into the following instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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Frequently asked questions

How cold does it get in West Conshohocken in December?

The average high-temperature and low-temperature during December are 42.6°F (5.9°C) and 30.9°F (-0.6°C) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is estimated at 89.6°F (32°C).

What is the average humidity in December in West Conshohocken?

The average relative humidity in December in West Conshohocken, Pennsylvania, is 78%.

How much does it rain in West Conshohocken in December?

In West Conshohocken, during December, the rain falls for 8.6 days and regularly aggregates up to 1.22" (31mm) of precipitation.

When does it start to snow in West Conshohocken?

December is the first month it typically snows in West Conshohocken, Pennsylvania. Throughout December, in the average 2.6 snowfall days, it receives 0.35" (9mm) of snow.

What is the month with the shortest days in West Conshohocken?

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

How many hours of daylight does West Conshohocken have in December?

In West Conshohocken, the average day length in December is 9h and 23min.

When is the sunrise / sunset in December in West Conshohocken?

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 7:23 am and sunset at 4:45 pm EST.

How long on average sun shines in December in West Conshohocken?

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

What are the months with the lowest UV index in West Conshohocken?

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

What is the UV index intensity in December in West Conshohocken?

In December, the average daily maximum UV index in West Conshohocken is 2. A UV Index reading of 2, and below, represents a minimal hazard to health 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
West Conshohocken, PA

Average temperature in December - West Conshohocken, PA
  • Average high temperature in December: 42.6°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in December: 30.9°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in December
West Conshohocken, PA

Average pressure in December - West Conshohocken, 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
West Conshohocken, PA

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

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

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Average humidity in December
West Conshohocken, PA

Average humidity in December - West Conshohocken, PA
  • Average humidity in December: 78%

The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (72%).

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Average rainfall in December
West Conshohocken, PA

Average rainfall in December - West Conshohocken, PA
  • Average rainfall in December: 1.22"

The wettest month (with the highest rainfall) is July (1.89").
The driest month (with the least rainfall) is February (0.91").

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Average rainfall days in December
West Conshohocken, PA

Average rainfall days in December - West Conshohocken, PA
  • Average rainfall days in December: 8.6 days

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is November (7.4 days).

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Average snowfall in December
West Conshohocken, PA

Average snowfall in December - West Conshohocken, PA
  • Average snowfall in December: 0.35"

The months with the highest snowfall are February and March (0.55").
The months with the least snowfall are April, June, July, August, September, October and November (0").

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Average snowfall days in December
West Conshohocken, PA

Average snowfall days in December - West Conshohocken, PA
  • Average snowfall days in December: 2.6 days

The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
West Conshohocken, PA

Average daylight in December / Average sunshine in December - West Conshohocken, 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 48min).

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Average sunshine days in December
West Conshohocken, PA

Average sunshine days in December - West Conshohocken, PA
  • Average sunshine days in December: 19.9 days

The month with the most sunshine days is November (20.5 days).
The months with the least sunshine days are May and June (12.8 days).

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Average UV index in December
West Conshohocken, PA

Average UV index in December - West Conshohocken, 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
West Conshohocken, PA

Average cloud cover in December - West Conshohocken, 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 32).

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Average visibility in December
West Conshohocken, PA

Average visibility in December - West Conshohocken, 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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West Conshohocken, Pennsylvania, USA

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