December weather forecast
Prompton, PA

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Weather in December

The first month of the winter, December, is also a wintry month in Prompton, Pennsylvania, with temperature in the range of an average low of 25°F (-3.9°C) and an average high of 36°F (2.2°C).

Temperature

A shift in the average high-temperature occurs in December, reducing from a chilly 45.9°F (7.7°C) in November to an icy 36°F (2.2°C). During December, Prompton records an average temperature of 25°F (-3.9°C) at night.

Humidity

With an average relative humidity of 85%, December is the most humid month.

Rainfall

In Prompton, in December, it is raining for 8.5 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 132.5 rainfall days, and 19.21" (488mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Prompton are January through May, October through December. The months with the most snowfall are January and December, with an average 3.27" (83mm) of accumulated snow.

Daylight

December has the shortest days of the year, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 7:09 am and sunset at 4:32 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:41 pm EST.

Sunshine

In December, the average sunshine in Prompton is 3.8h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Frequently asked questions

How cold is it in Prompton in December?

An average high-temperature, in December, in Prompton, is 36°F (2.2°C) and the average low-temperature is 25°F (-3.9°C). In July, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 86°F (30°C).

What is the most humid month?

With an average relative humidity of 85%, December is the most humid month.

What is the average humidity in December?

In Prompton, the average relative humidity in December is 85%.

How many days does it rain in December?

In Prompton, in December, it is raining for 8.5 days, with typically 1.46" (37mm) of accumulated precipitation.

When does it snow the most?

The months with the most snowfall in Prompton are January and December, with an average 3.27" (83mm) of accumulated snow.

How much does it snow in December?

In Prompton, Pennsylvania, in December, during 8.2 snowfall days, 3.27" (83mm) of snow is typically accumulated.

What is the month with the shortest days in Prompton?

December has the shortest days of the year in Prompton, with an average of 9h and 12min of daylight.

How many hours of daylight does Prompton have in December?

In Prompton, the average day length in December is 9h and 13min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:09 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:41 pm EST.

How many hours of sunshine does Prompton have in December?

The average sunshine duration in December is 3.8h.

What is the month with the lowest UV index?

December is the month with the lowest UV index, with an average maximum UV index of 1.

How high is the UV index in December?

The average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health risk from unsafe 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
Prompton, PA

Average temperature in December - Prompton, PA
  • Average high temperature in December: 36°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.4°F).

  • Average low temperature in December: 25°F

The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average pressure in December
Prompton, PA

Average pressure in December - Prompton, PA
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Prompton, PA

Average wind speed in December - Prompton, PA
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is February (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in December
Prompton, PA

Average humidity in December - Prompton, PA
  • Average humidity in December: 85%

The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is July (77%).

Average rainfall in December
Prompton, PA

Average rainfall in December - Prompton, PA
  • Average rainfall in December: 1.46"

The wettest months (with the highest rainfall) are July and August (2.09").
The driest months (with the least rainfall) are January and September (1.14").

Average rainfall days in December
Prompton, PA

Average rainfall days in December - Prompton, PA
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is May (15.6 days).
The months with the least rainy days are January and February (6.9 days).

Average snowfall in December
Prompton, PA

Average snowfall in December - Prompton, PA
  • Average snowfall in December: 3.27"

The months with the highest snowfall are January and December (3.27").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Prompton, PA

Average snowfall days in December - Prompton, PA
  • Average snowfall days in December: 8.2 days

The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Prompton, PA
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 3h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).

Average sunshine days in December
Prompton, PA

Average sunshine days in December - Prompton, PA
  • Average sunshine days in December: 15.2 days

The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (12.5 days).

Average UV index in December
Prompton, PA

Average UV index in December - Prompton, PA
  • Average UV index in December: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Prompton, PA

Average cloud cover in December - Prompton, PA
  • Average cloud cover in December: 62

The months with the most cloud cover are February and December (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 38).

Average visibility in December
Prompton, PA

Average visibility in December - Prompton, PA
  • Average visibility in December: 5mi

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

Prompton, Pennsylvania, USA

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