December weather forecast
Prospect, PA

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Weather in December

The first month of the winter, December, is also an icy month in Prospect, Pennsylvania, with an average temperature varying between 26.8°F (-2.9°C) and 37.9°F (3.3°C).

Temperature

December shows a mild decline in the average high-temperature, falling from November's frosty 47.5°F (8.6°C) to a wintry 37.9°F (3.3°C). During December, Prospect records a consistent average nighttime temperature of 26.8°F (-2.9°C).

Humidity

The average relative humidity in December is 86%.

Rainfall

In December, the rain falls for 11.6 days. Throughout December, 2.83" (72mm) of precipitation is accumulated. In Prospect, during the entire year, the rain falls for 179.7 days and collects up to 35.35" (898mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Prospect, Pennsylvania, in December, snow falls for 14.9 days, with typically accumulated 5.12" (130mm) of snow. Throughout the year, in Prospect, there are 70.8 snowfall days, and 27.76" (705mm) of snow is accumulated.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:26 am and sunset at 4:52 pm. On the last day of December, in Prospect, sunrise is at 7:44 am and sunset at 5:02 pm EST.

Sunshine

In Prospect, the average sunshine in December is 3h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
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Frequently asked questions

Is December cold in Prospect?

In Prospect, in December, the average high-temperature is 37.9°F (3.3°C), and the average low-temperature is 26.8°F (-2.9°C). In July, the average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 89.6°F (32°C).

What is the average humidity in December in Prospect?

In December, the average relative humidity is 86%.

How much does it rain in Prospect in December?

In December, in Prospect, the rain falls for 11.6 days. Throughout December, 2.83" (72mm) of precipitation is accumulated.

How many days does it snow in December in Prospect?

In Prospect, in December, snow falls for 14.9 days, with typically accumulated 5.12" (130mm) of snow.

What is the month with the shortest days in Prospect?

December has the shortest days of the year in Prospect, Pennsylvania, with an average of 9h and 18min of daylight.

What is the average length of the day in December in Prospect?

In Prospect, the average day length in December is 9h and 17min.

When are sunrise and sunset in December in Prospect?

In December, on the first day of the month, sunrise is at 7:26 am and sunset at 4:52 pm. On the last day of the month, in Prospect, sunrise is at 7:44 am and sunset at 5:02 pm EST.

How long on average sun shines in December in Prospect?

In Prospect, Pennsylvania, the average sunshine duration in December is 3h.

What is the month with the lowest UV index in Prospect?

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

What is the UV index intensity in December in Prospect?

In Prospect, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a low health threat 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
Prospect, PA

Average temperature in December - Prospect, PA
  • Average high temperature in December: 37.9°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (31.6°F).

  • Average low temperature in December: 26.8°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).

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Average pressure in December
Prospect, PA

Average pressure in December - Prospect, PA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in December
Prospect, PA

Average wind speed in December - Prospect, PA
  • Average wind speed in December: 7.5mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).

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Average humidity in December
Prospect, PA

Average humidity in December - Prospect, PA
  • Average humidity in December: 86%

The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, May, June, July and August (78%).

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Average rainfall in December
Prospect, PA

Average rainfall in December - Prospect, PA
  • Average rainfall in December: 2.83"

The wettest month (with the highest rainfall) is April (3.7").
The driest month (with the least rainfall) is November (2.28").

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Average rainfall days in December
Prospect, PA

Average rainfall days in December - Prospect, PA
  • Average rainfall days in December: 11.6 days

The month with the highest number of rainy days is May (19.9 days).
The month with the least rainy days is January (9.4 days).

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Average snowfall in December
Prospect, PA

Average snowfall in December - Prospect, PA
  • Average snowfall in December: 5.12"

The month with the highest snowfall is January (7.68").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Prospect, PA

Average snowfall days in December - Prospect, PA
  • Average snowfall days in December: 14.9 days

The month with the highest number of snowfall days is January (19.1 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
Prospect, PA

Average daylight in December / Average sunshine in December - Prospect, PA
  • Average daylight in December: 9h and 2min

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 18min).

  • Average sunshine in December: 3h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).

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Average sunshine days in December
Prospect, PA

Average sunshine days in December - Prospect, PA
  • Average sunshine days in December: 8.6 days

The month with the most sunshine days is November (14 days).
The month with the least sunshine days is February (6.6 days).

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Average UV index in December
Prospect, PA

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

The month with the highest UV index is 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
Prospect, PA

Average cloud cover in December - Prospect, PA
  • Average cloud cover in December: 68

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in December
Prospect, PA

Average visibility in December - Prospect, PA
  • Average visibility in December: 4mi

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

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Prospect, Pennsylvania, USA

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