December weather forecast
Norvelt, PA

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Weather in December

The first month of the winter, December, is still a cold month in Norvelt, Pennsylvania, with an average temperature fluctuating between 27.7°F (-2.4°C) and 39.2°F (4°C).

Temperature

In Norvelt, the beginning of December is marked by a lowered average high-temperature, shifting from November's chilly 48.9°F (9.4°C) to an icy 39.2°F (4°C). In December, Norvelt records an average nighttime temperature of 27.7°F (-2.4°C).

Humidity

The average relative humidity in December is 84%.

Rainfall

In Norvelt, during December, the rain falls for 13.1 days and regularly aggregates up to 3.03" (77mm) of precipitation. In Norvelt, during the entire year, the rain falls for 185.4 days and collects up to 34.02" (864mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Norvelt, during December, snow falls for 12.8 days and regularly aggregates up to 6.1" (155mm) of snow. In Norvelt, during the entire year, snow falls for 63.2 days and aggregates up to 29.02" (737mm) of snow.

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 7:21 am and sunset at 4:52 pm. On the last day of December, sunrise is at 7:40 am and sunset at 5:02 pm EST.

Sunshine

In Norvelt, the average sunshine in December is 3.6h.

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 value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

Norvelt in December has an average high-temperature of 39.2°F (4°C) and an average low-temperature of 27.7°F (-2.4°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is computed to be 84.2°F (29°C).

What is the average humidity in December?

In December, the average relative humidity is 84%.

How much does it rain in December?

In Norvelt, during December, the rain falls for 13.1 days and regularly aggregates up to 3.03" (77mm) of precipitation.

How many days does it snow in December?

In Norvelt, during December, snow falls for 12.8 days and regularly aggregates up to 6.1" (155mm) of snow.

What is the month with the shortest days in Norvelt?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

How many hours of daylight does Norvelt have 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 7:21 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 5:02 pm EST.

How many hours of sunshine does Norvelt have in December?

In December, the average sunshine duration is 3.6h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health threat 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
Norvelt, PA

Average temperature in December - Norvelt, PA
  • Average high temperature in December: 39.2°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in December: 27.7°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).

Average pressure in December
Norvelt, PA

Average pressure in December - Norvelt, PA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Norvelt, PA

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

The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Norvelt, PA

Average humidity in December - Norvelt, PA
  • Average humidity in December: 84%

The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in December
Norvelt, PA

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

The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is November (2.01").

Average rainfall days in December
Norvelt, PA

Average rainfall days in December - Norvelt, PA
  • Average rainfall days in December: 13.1 days

The month with the highest number of rainy days is May (22 days).
The month with the least rainy days is January (9.8 days).

Average snowfall in December
Norvelt, PA

Average snowfall in December - Norvelt, PA
  • Average snowfall in December: 6.1"

The month with the highest snowfall is January (7.09").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Norvelt, PA

Average snowfall days in December - Norvelt, PA
  • Average snowfall days in December: 12.8 days

The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Norvelt, 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: 3h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in December
Norvelt, PA

Average sunshine days in December - Norvelt, PA
  • Average sunshine days in December: 9.7 days

The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is January (6.5 days).

Average UV index in December
Norvelt, PA

Average UV index in December - Norvelt, PA
  • Average UV index in December: 2

The month with the highest UV index is July (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
Norvelt, PA

Average cloud cover in December - Norvelt, PA
  • Average cloud cover in December: 64

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in December
Norvelt, PA

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

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).

Norvelt, Pennsylvania, USA

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