December weather forecast
Souderton, PA

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Weather in December

December, the first month of the winter in Souderton, is also an icy month, with an average temperature varying between 41.9°F (5.5°C) and 30.2°F (-1°C).

Temperature

The transition to December results in a modest reduction in average high-temperature, moving from a fresh 50.7°F (10.4°C) in November to a cold 41.9°F (5.5°C). An average low-temperature of 30.2°F (-1°C) marks the month of December.

Humidity

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

Rainfall

In Souderton, during December, the rain falls for 10.4 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, there are 157.1 rainfall days, and 31.73" (806mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Souderton, during December, snow falls for 4.3 days and regularly aggregates up to 2.48" (63mm) of snow. Throughout the year, there are 26.7 snowfall days, and 14.37" (365mm) of snow is accumulated.

Daylight

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

Sunshine

In Souderton, the average sunshine in December is 4.9h.

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 of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.
Note: In December, the maximum UV index of 2 suggests this advice:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Updated: Jul 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

An average high-temperature, in December, in Souderton, is 41.9°F (5.5°C) and the average low-temperature is 30.2°F (-1°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 87.8°F (31°C).

What is the average humidity in December?

In December, the average relative humidity is 79%.

How many days does it rain in December?

In Souderton, in December, during 10.4 rainfall days, 3.03" (77mm) of precipitation is typically accumulated.

How much does it snow in December?

In December, it is snowing for 4.3 days. Throughout December, 2.48" (63mm) of snow is accumulated.

What is the month with the shortest days?

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

How many hours of daylight does Souderton have in December?

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

When is the sunrise / sunset in December?

In December, on the first day of the month, 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 December, the average sunshine duration is 4.9h.

When is the lowest UV index?

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

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to 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
Souderton, PA

Average temperature in December - Souderton, PA
  • Average high temperature in December: 41.9°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 30.2°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (23°F).

Average pressure in December
Souderton, PA

Average pressure in December - Souderton, 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
Souderton, PA

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

The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in December
Souderton, PA

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

The month with the highest relative humidity is February (80%).
The months with the lowest relative humidity are April and July (74%).

Average rainfall in December
Souderton, PA

Average rainfall in December - Souderton, PA
  • Average rainfall in December: 3.03"

The wettest months (with the highest rainfall) are July and August (3.07").
The driest month (with the least rainfall) is September (1.85").

Average rainfall days in December
Souderton, PA

Average rainfall days in December - Souderton, PA
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is January (8.8 days).

Average snowfall in December
Souderton, PA

Average snowfall in December - Souderton, PA
  • Average snowfall in December: 2.48"

The month with the highest snowfall is March (4.13").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Souderton, PA

Average snowfall days in December - Souderton, PA
  • Average snowfall days in December: 4.3 days

The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Souderton, 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: 4h and 5min

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 42min).

Average sunshine days in December
Souderton, PA

Average sunshine days in December - Souderton, PA
  • Average sunshine days in December: 17.3 days

The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is June (11.9 days).

Average UV index in December
Souderton, PA

Average UV index in December - Souderton, 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).

Average cloud cover in December
Souderton, PA

Average cloud cover in December - Souderton, PA
  • Average cloud cover in December: 49

The months with the most cloud cover are February and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Souderton, PA

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

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

Souderton, Pennsylvania, USA

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