December weather forecast
Olwen Heights, PA

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Weather in December

The first month of the winter, December, is also a wintry month in Olwen Heights, Pennsylvania, with temperature in the range of an average high of 35.6°F (2°C) and an average low of 25.2°F (-3.8°C).

Temperature

December comes with a decrease in the average high-temperature, falling from a chilly 45.1°F (7.3°C) in November to an icy 35.6°F (2°C). Olwen Heights experiences a steady low-temperature of 25.2°F (-3.8°C) throughout December.

Humidity

The months with the highest humidity are February and December, with an average relative humidity of 85%.

Rainfall

In Olwen Heights, Pennsylvania, in December, during 8.1 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Olwen Heights, Pennsylvania, during the entire year, the rain falls for 139.9 days and collects up to 22.28" (566mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Olwen Heights, in December, snow falls for 8.4 days, with typically accumulated 4.21" (107mm) of snow. Throughout the year, in Olwen Heights, Pennsylvania, there are 48.4 snowfall days, and 22.01" (559mm) of snow is accumulated.

Daylight

The month with the shortest days in Olwen Heights is December, 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 4:33 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:42 pm EST.

Sunshine

In Olwen Heights, Pennsylvania, the average sunshine in December is 3.6h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Olwen Heights. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.
Note: In December, a daily UV index of 1 turns into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. 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 is it in Olwen Heights in December?

An average high-temperature, in December, in Olwen Heights, is 35.6°F (2°C) and the average low-temperature is 25.2°F (-3.8°C).

What is the most humid month in Olwen Heights?

The months with the highest humidity are February and December, with an average relative humidity of 85%.

What is the average humidity in December in Olwen Heights?

The average relative humidity in December in Olwen Heights is 85%.

How many days does it rain in December in Olwen Heights?

In December, in Olwen Heights, Pennsylvania, the rain falls for 8.1 days. Throughout December, 1.54" (39mm) of precipitation is accumulated.

How much does it snow in Olwen Heights in December?

In Olwen Heights, Pennsylvania, in December, during 8.4 snowfall days, 4.21" (107mm) of snow is typically accumulated.

What is the month with the shortest days in Olwen Heights?

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

How many hours of daylight does Olwen Heights have in December?

The average day length in December in Olwen Heights is 9h and 15min.

When is the sunrise / sunset in December in Olwen Heights?

In December, on the first day of the month, sunrise is at 7:09 am and sunset at 4:33 pm. On the last day of the month, in Olwen Heights, Pennsylvania, sunrise is at 7:28 am and sunset at 4:42 pm EST.

How long on average sun shines in December in Olwen Heights?

The average sunshine duration in December in Olwen Heights, Pennsylvania, is 3.6h.

What are the months with the lowest UV index in Olwen Heights?

The months with the lowest UV index are January and December, with an average maximum UV index of 1.

How high is the UV index in December in Olwen Heights?

In December, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents 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
Olwen Heights, PA

Average temperature in December - Olwen Heights, PA
  • Average high temperature in December: 35.6°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (29.8°F).

  • Average low temperature in December: 25.2°F

The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in December
Olwen Heights, PA

Average pressure in December - Olwen Heights, 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 (29.94"Hg).

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Average wind speed in December
Olwen Heights, PA

Average wind speed in December - Olwen Heights, PA
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in December
Olwen Heights, PA

Average humidity in December - Olwen Heights, PA
  • Average humidity in December: 85%

The months with the highest relative humidity are February and December (85%).
The months with the lowest relative humidity are April, June and July (78%).

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Average rainfall in December
Olwen Heights, PA

Average rainfall in December - Olwen Heights, PA
  • Average rainfall in December: 1.54"

The wettest months (with the highest rainfall) are May and July (2.4").
The driest months (with the least rainfall) are January and September (1.38").

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Average rainfall days in December
Olwen Heights, PA

Average rainfall days in December - Olwen Heights, PA
  • Average rainfall days in December: 8.1 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (5.2 days).

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Average snowfall in December
Olwen Heights, PA

Average snowfall in December - Olwen Heights, PA
  • Average snowfall in December: 4.21"

The month with the highest snowfall is March (5.08").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Olwen Heights, PA

Average snowfall days in December - Olwen Heights, PA
  • Average snowfall days in December: 8.4 days

The month with the highest number of snowfall days is February (11.8 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
Olwen Heights, PA

Average daylight in December / Average sunshine in December - Olwen Heights, 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 4min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).

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Average sunshine days in December
Olwen Heights, PA

Average sunshine days in December - Olwen Heights, PA
  • Average sunshine days in December: 17.4 days

The month with the most sunshine days is January (18.4 days).
The month with the least sunshine days is May (11 days).

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Average UV index in December
Olwen Heights, PA

Average UV index in December - Olwen Heights, PA
  • Average UV index in December: 1

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

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Average cloud cover in December
Olwen Heights, PA

Average cloud cover in December - Olwen Heights, PA
  • Average cloud cover in December: 64

The months with the most cloud cover are February and December (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 38).

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Average visibility in December
Olwen Heights, PA

Average visibility in December - Olwen Heights, 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).

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Olwen Heights, Pennsylvania, USA

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