December weather forecast
Oley, PA

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Weather in December

The first month of the winter, December, is also a wintry month in Oley, Pennsylvania, with temperature in the range of an average low of 30°F (-1.1°C) and an average high of 41.4°F (5.2°C).

Temperature

As December arrives, Oley's weather displays a minor decrease in high-temperatures, transitioning from November's cool 50.2°F (10.1°C) to an icy 41.4°F (5.2°C). Nighttime temperatures in December average to a freezing cold 30°F (-1.1°C).

Humidity

The average relative humidity in December is 80%.

Rainfall

In December, in Oley, the rain falls for 8.4 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. Throughout the year, there are 129 rainfall days, and 13.5" (343mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, November and December. In December, it is snowing for 3.2 days. Throughout December, 0.39" (10mm) of snow is accumulated. In Oley, during the entire year, snow falls for 19.4 days and aggregates up to 4.45" (113mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:07 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:46 pm EST.

Sunshine

In Oley, the average sunshine in December is 4.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Always opt for UVA and UVB-resistant sunglasses on radiant days. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

The average high-temperature, in December, in Oley, is 41.4°F (5.2°C), while the average low-temperature is 30°F (-1.1°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is appraised at 86°F (30°C).

What is the average humidity in December?

In Oley, the average relative humidity in December is 80%.

How many days does it rain in December?

In December, the rain falls for 8.4 days. Throughout December, 0.91" (23mm) of precipitation is accumulated.

How much does it snow in December?

In Oley, in December, snow falls for 3.2 days, with typically accumulated 0.39" (10mm) of snow.

What is the month with the shortest days?

The month with the shortest days in Oley is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Oley have in December?

In Oley, the average day length in December is 9h and 21min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:46 pm EST.

How long on average sun shines in December?

In Oley, Pennsylvania, the average sunshine duration in December is 4.8h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

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

Average temperature in December - Oley, PA
  • Average high temperature in December: 41.4°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 30°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in December
Oley, PA

Average pressure in December - Oley, 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).

Average wind speed in December
Oley, PA

Average wind speed in December - Oley, PA
  • Average wind speed in December: 7.8mph

The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Oley, PA

Average humidity in December - Oley, PA
  • Average humidity in December: 80%

The months with the highest relative humidity are February and October (81%).
The month with the lowest relative humidity is April (76%).

Average rainfall in December
Oley, PA

Average rainfall in December - Oley, PA
  • Average rainfall in December: 0.91"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is February (0.79").

Average rainfall days in December
Oley, PA

Average rainfall days in December - Oley, PA
  • Average rainfall days in December: 8.4 days

The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (7.1 days).

Average snowfall in December
Oley, PA

Average snowfall in December - Oley, PA
  • Average snowfall in December: 0.39"

The month with the highest snowfall is February (1.54").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Oley, PA

Average snowfall days in December - Oley, PA
  • Average snowfall days in December: 3.2 days

The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Oley, 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 18min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Oley, PA

Average sunshine days in December - Oley, PA
  • Average sunshine days in December: 19.3 days

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is May (12.3 days).

Average UV index in December
Oley, PA

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

The months with the highest UV index are May, June and 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
Oley, PA

Average cloud cover in December - Oley, PA
  • Average cloud cover in December: 48

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Oley, PA

Average visibility in December - Oley, PA
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are May, September and October (5mi).

Oley, Pennsylvania, USA

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