December weather forecast
Charleroi, PA

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Weather in December

December, the first month of the winter in Charleroi, is also an icy month, with temperature in the range of an average high of 40.1°F (4.5°C) and an average low of 28.8°F (-1.8°C).

Temperature

Charleroi in December experiences a subtle temperature decline, with average high-temperatures reducing from a frosty 49.6°F (9.8°C) in November to a cold 40.1°F (4.5°C). Charleroi's temperature tends to fall to an average low of 28.8°F (-1.8°C) during the nights of December.

Humidity

In December, the average relative humidity in Charleroi, Pennsylvania, is 83%.

Rainfall

In Charleroi, during December, the rain falls for 14 days and regularly aggregates up to 3.07" (78mm) of precipitation. Throughout the year, there are 191.3 rainfall days, and 35.24" (895mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Charleroi are January through May, October through December. In Charleroi, in December, during 12.6 snowfall days, 4.88" (124mm) of snow is typically accumulated. In Charleroi, during the entire year, snow falls for 60.2 days and aggregates up to 25.08" (637mm) 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 7:23 am and sunset at 4:54 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:04 pm EST.

Sunshine

The average sunshine in December in Charleroi is 3.6h.

UV index

December is the month with the lowest UV index in Charleroi, Pennsylvania, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.
Note: An average maximum UV index of 1 in December leads to these recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
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Frequently asked questions

How cold does it get in Charleroi in December?

December temperatures vary between a high-temperature of 40.1°F (4.5°C) and a low-temperature of 28.8°F (-1.8°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 87.8°F (31°C).

What is the average humidity in December in Charleroi?

In Charleroi, the average relative humidity in December is 83%.

How many days does it rain in December in Charleroi?

In December, in Charleroi, Pennsylvania, the rain falls for 14 days. Throughout December, 3.07" (78mm) of precipitation is accumulated.

How much does it snow in Charleroi in December?

In Charleroi, Pennsylvania, during December, snow falls for 12.6 days and regularly aggregates up to 4.88" (124mm) of snow.

What is the month with the shortest days in Charleroi?

December has the shortest days of the year in Charleroi, Pennsylvania, with an average of 9h and 24min of daylight.

How many hours of daylight does Charleroi have in December?

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

When are sunrise and sunset in December in Charleroi?

On the first day of December in Charleroi, sunrise is at 7:23 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:04 pm EST.

How many hours of sunshine does Charleroi have in December?

In Charleroi, the average sunshine duration in December is 3.6h.

When is the lowest UV index in Charleroi?

With an average maximum UV index of 1, December is the month with the lowest UV index in Charleroi, Pennsylvania.

What is the UV index reading in December in Charleroi?

In Charleroi, Pennsylvania, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes 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
Charleroi, PA

Average temperature in December - Charleroi, PA
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in December: 28.8°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

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Average pressure in December
Charleroi, PA

Average pressure in December - Charleroi, 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).

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Average wind speed in December
Charleroi, PA

Average wind speed in December - Charleroi, PA
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

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Average humidity in December
Charleroi, PA

Average humidity in December - Charleroi, PA
  • Average humidity in December: 83%

The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (76%).

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Average rainfall in December
Charleroi, PA

Average rainfall in December - Charleroi, PA
  • Average rainfall in December: 3.07"

The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is November (2.13").

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Average rainfall days in December
Charleroi, PA

Average rainfall days in December - Charleroi, PA
  • Average rainfall days in December: 14 days

The month with the highest number of rainy days is May (21.8 days).
The months with the least rainy days are January and February (11.7 days).

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Average snowfall in December
Charleroi, PA

Average snowfall in December - Charleroi, PA
  • Average snowfall in December: 4.88"

The month with the highest snowfall is January (6.26").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Charleroi, PA

Average snowfall days in December - Charleroi, PA
  • Average snowfall days in December: 12.6 days

The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Charleroi, 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 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

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Average sunshine days in December
Charleroi, PA

Average sunshine days in December - Charleroi, PA
  • Average sunshine days in December: 9.9 days

The month with the most sunshine days is November (14.3 days).
The month with the least sunshine days is January (6.8 days).

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Average UV index in December
Charleroi, PA

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

The months with the highest UV index are May, June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in December
Charleroi, PA

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

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in December
Charleroi, PA

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

The months with the highest visibility are April, August and November (6mi).
The months with the lowest visibility are January and February (4mi).

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Charleroi, Pennsylvania, USA

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