December weather forecast
Newtown, PA

Share

Weather in December

December, the first month of the winter in Newtown, is still a chilly month, with an average temperature ranging between min 31.1°F (-0.5°C) and max 42.8°F (6°C).

Temperature

The transition into December involves a decrease in the average high-temperature, falling from a fresh 52°F (11.1°C) in November to a chilly 42.8°F (6°C). An average minimum temperature of 31.1°F (-0.5°C) is recorded during the month of December.

Humidity

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

Rainfall

The month with the most rainfall is December, when the rain falls for 10.7 days and typically aggregates up to 3.31" (84mm) of precipitation.

Snowfall

Months with snowfall in Newtown are January through May, October through December. In December, it is snowing for 3.6 days. Throughout December, 1.61" (41mm) of snow is accumulated. In Newtown, during the entire year, snow falls for 24 days and aggregates up to 12.13" (308mm) of snow.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year in Newtown.
On the first day of December, sunrise is at 7:03 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:43 pm EST.

Sunshine

In Newtown, the average sunshine in December is 5h.

UV index

The months with the lowest UV index in Newtown 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 exposure to the Sun's UV rays for the average person.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Frequently asked questions

How cold does it get in December?

The high-temperature during December is 42.8°F (6°C) and the low-temperature is 31.1°F (-0.5°C). The average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, in August is appraised at 89.6°F (32°C).

What is the average humidity in December?

In December, the average relative humidity is 77%.

What is the rainiest month?

December is the month with the most rainfall. Rain falls for 10.7 days and accumulates 3.31" (84mm) of precipitation.

How many days does it rain in December in Newtown?

In December, the rain falls for 10.7 days. Throughout December, 3.31" (84mm) of precipitation is accumulated.

How many days does it snow in December?

In Newtown, Pennsylvania, in December, during 3.6 snowfall days, 1.61" (41mm) of snow is typically 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.

What is the average length of the day in December?

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

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:03 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:43 pm EST.

How many hours of sunshine does Newtown have in December?

In December, the average sunshine duration is 5h.

What are the months with 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.

What is the UV index reading in December?

In Newtown, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's 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
Newtown, PA

Average temperature in December - Newtown, PA
  • Average high temperature in December: 42.8°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 (36.9°F).

  • Average low temperature in December: 31.1°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).

Average pressure in December
Newtown, PA

Average pressure in December - Newtown, 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 (29.93"Hg).

Average wind speed in December
Newtown, PA

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

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in December
Newtown, PA

Average humidity in December - Newtown, PA
  • Average humidity in December: 77%

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

Average rainfall in December
Newtown, PA

Average rainfall in December - Newtown, PA
  • Average rainfall in December: 3.31"

The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in December
Newtown, PA

Average rainfall days in December - Newtown, PA
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is November (8.5 days).

Average snowfall in December
Newtown, PA

Average snowfall in December - Newtown, PA
  • Average snowfall in December: 1.61"

The month with the highest snowfall is March (3.78").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Newtown, PA

Average snowfall days in December - Newtown, PA
  • Average snowfall days in December: 3.6 days

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Newtown, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Newtown, PA

Average sunshine days in December - Newtown, PA
  • Average sunshine days in December: 16.7 days

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (11.4 days).

Average UV index in December
Newtown, PA

Average UV index in December - Newtown, 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
Newtown, PA

Average cloud cover in December - Newtown, PA
  • Average cloud cover in December: 48

The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Newtown, PA

Average visibility in December - Newtown, 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).

Newtown, Pennsylvania, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location