December weather forecast
Ambler, PA

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Weather in December

December, the first month of the winter in Ambler, is also a frosty month, with an average temperature fluctuating between 42.8°F (6°C) and 31.6°F (-0.2°C).

Temperature

December's arrival correlates with a reduction in the average high-temperature, down from a fresh 52.2°F (11.2°C) in November to a frosty 42.8°F (6°C). During December, Ambler records a consistent average nighttime temperature of 31.6°F (-0.2°C).

Humidity

The months with the highest humidity are February, October and December, with an average relative humidity of 78%.

Rainfall

In Ambler, in December, during 7.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Ambler, during the entire year, the rain falls for 122.4 days and collects up to 12.68" (322mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In Ambler, Pennsylvania, in December, during 2.5 snowfall days, 0.71" (18mm) of snow is typically accumulated. Throughout the year, there are 16.3 snowfall days, and 4.72" (120mm) of snow is accumulated.

Daylight

The month with the shortest days is December, 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 4:35 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:45 pm EST.

Sunshine

In Ambler, Pennsylvania, the average sunshine in December 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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in December transforms into the following instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.

Frequently asked questions

How cold is December?

The high-temperature, in December, in Ambler, records 42.8°F (6°C), while the low-temperature is 31.6°F (-0.2°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 89.6°F (32°C).

What are the most humid months?

February, October and December, with an average relative humidity of 78%, are most humid months.

What is the average humidity in December in Ambler?

In Ambler, the average relative humidity in December is 78%.

How many days does it rain in December?

In Ambler, in December, it is raining for 7.5 days, with typically 1.14" (29mm) of accumulated precipitation.

How much does it snow in December?

In Ambler, during December, snow falls for 2.5 days and regularly aggregates up to 0.71" (18mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, 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.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:04 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 many hours of sunshine does Ambler have in December?

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

What are the months with the lowest UV index in Ambler?

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

What is the UV index intensity in December?

The average daily maximum UV index in December in Ambler is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability 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
Ambler, PA

Average temperature in December - Ambler, PA
  • Average high temperature in December: 42.8°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in December: 31.6°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).

Average pressure in December
Ambler, PA

Average pressure in December - Ambler, 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
Ambler, PA

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

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in December
Ambler, PA

Average humidity in December - Ambler, PA
  • Average humidity in December: 78%

The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April, July and August (72%).

Average rainfall in December
Ambler, PA

Average rainfall in December - Ambler, PA
  • Average rainfall in December: 1.14"

The wettest month (with the highest rainfall) is August (1.54").
The driest month (with the least rainfall) is September (0.75").

Average rainfall days in December
Ambler, PA

Average rainfall days in December - Ambler, PA
  • Average rainfall days in December: 7.5 days

The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is November (6.4 days).

Average snowfall in December
Ambler, PA

Average snowfall in December - Ambler, PA
  • Average snowfall in December: 0.71"

The month with the highest snowfall is February (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Ambler, PA

Average snowfall days in December - Ambler, PA
  • Average snowfall days in December: 2.5 days

The month with the highest number of snowfall days is January (5.1 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
Ambler, PA

Average daylight in December / Average sunshine in December - Ambler, 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).

Average sunshine days in December
Ambler, PA

Average sunshine days in December - Ambler, PA
  • Average sunshine days in December: 20.9 days

The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (14.4 days).

Average UV index in December
Ambler, PA

Average UV index in December - Ambler, 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
Ambler, PA

Average cloud cover in December - Ambler, 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).

Average visibility in December
Ambler, PA

Average visibility in December - Ambler, 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).

Ambler, Pennsylvania, USA

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