December weather forecast
Monessen, PA

Weather in December

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

Temperature

In December, the average high-temperature decreases from a chilly 49.6°F (9.8°C) in November to a wintry 40.1°F (4.5°C). In Monessen, in December, the average low-temperature is 28.8°F (-1.8°C).

Humidity

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

Rainfall

In Monessen, during December, the rain falls for 14 days and regularly aggregates up to 3.07" (78mm) of precipitation. In Monessen, during the entire year, the rain falls for 191.3 days and collects up to 35.24" (895mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Monessen, snow falls for 12.6 days, with typically accumulated 4.88" (124mm) of snow. In Monessen, 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 in Monessen is December, with an average of 9h and 22min of daylight.
On the first day of the month, sunrise is at 7:22 am and sunset at 4:54 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:03 pm EST.

Sunshine

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

UV index

December is the month with the lowest UV index in Monessen, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 1 in December transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Monessen?

The average relative humidity in December in Monessen is 83%.

How much does it rain in Monessen in December?

In Monessen, Pennsylvania, in December, during 14 rainfall days, 3.07" (78mm) of precipitation is typically accumulated.

How much does it snow in Monessen in December?

In Monessen, Pennsylvania, in December, snow falls for 12.6 days, with typically accumulated 4.88" (124mm) of snow.

What is the month with the shortest days in Monessen?

With an average of 9h and 22min of daylight, December has the shortest days of the year.

How many hours of daylight does Monessen have in December?

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

When are sunrise and sunset in December in Monessen?

In December, on the first day of the month, sunrise is at 7:22 am and sunset at 4:54 pm. On the last day of the month, in Monessen, sunrise is at 7:41 am and sunset at 5:03 pm EST.

How long on average sun shines in December in Monessen?

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

When is the lowest UV index in Monessen?

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

How high is the UV index in December in Monessen?

In December, the average daily maximum UV index in Monessen is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.

Average temperature in December
Monessen, PA

Average temperature in December - Monessen, 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
Monessen, PA

Average pressure in December - Monessen, 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
Monessen, PA

Average wind speed in December - Monessen, 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
Monessen, PA

Average humidity in December - Monessen, 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
Monessen, PA

Average rainfall in December - Monessen, 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
Monessen, PA

Average rainfall days in December - Monessen, 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
Monessen, PA

Average snowfall in December - Monessen, 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
Monessen, PA

Average snowfall days in December - Monessen, 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
Monessen, PA

Average daylight in December / Average sunshine in December - Monessen, PA
  • Average daylight in December: 9h and 22min

The month with the longest days is June (Average daylight: 14h and 59min).
The month with the shortest days is December (Average daylight: 9h and 22min).

  • Average sunshine in December: 3.6h

The month with the most sunshine is August (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 3h).

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Average sunshine days in December
Monessen, PA

Average sunshine days in December - Monessen, 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
Monessen, PA

Average UV index in December - Monessen, 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
Monessen, PA

Average cloud cover in December - Monessen, 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
Monessen, PA

Average visibility in December - Monessen, 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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