December weather forecast
Bethany, PA

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Weather in December

December, the first month of the winter in Bethany, is also an icy month, with an average temperature varying between 36°F (2.2°C) and 25°F (-3.9°C).

Temperature

December indicates a shift in the average high-temperature, from November's chilly 45.9°F (7.7°C) to a wintry 36°F (2.2°C). The average nighttime temperature lowers to a subzero cold 25°F (-3.9°C) throughout December.

Humidity

December is the most humid month, with an average relative humidity of 85%.

Rainfall

In December, the rain falls for 8.5 days. Throughout December, 1.46" (37mm) of precipitation is accumulated. Throughout the year, in Bethany, there are 132.5 rainfall days, and 19.21" (488mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. The months with the most snowfall in Bethany, Pennsylvania, are January and December, with an average 3.27" (83mm) of accumulated snow.

Daylight

December has the shortest days of the year, 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 4:31 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:41 pm EST.

Sunshine

In Bethany, the average sunshine in December is 3.8h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 1 during December translates into the following directions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Updated: Jul 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

During December, Bethany experiences an average high-temperature of 36°F (2.2°C) and a low-temperature of 25°F (-3.9°C). In July, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is evaluated at 86°F (30°C).

What is the most humid month?

December is the most humid month, with an average relative humidity of 85%.

What is the average humidity in December?

In December, the average relative humidity is 85%.

How much does it rain in December?

In December, in Bethany, the rain falls for 8.5 days. Throughout December, 1.46" (37mm) of precipitation is accumulated.

What is the snowiest month?

The months with the most snowfall are January and December, with an average 3.27" (83mm) of accumulated snow.

How many days does it snow in December?

In December, in Bethany, it is snowing for 8.2 days. Throughout December, 3.27" (83mm) of snow is accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

In Bethany, the average day length in December is 9h and 13min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:09 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:41 pm EST.

How many hours of sunshine does Bethany have in December?

In December, the average sunshine duration is 3.8h.

When is the lowest UV index?

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

What is the UV index reading in December?

In December, the average daily maximum UV index in Bethany is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's 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
Bethany, PA

Average temperature in December - Bethany, PA
  • Average high temperature in December: 36°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.4°F).

  • Average low temperature in December: 25°F

The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average pressure in December
Bethany, PA

Average pressure in December - Bethany, 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 (29.93"Hg).

Average wind speed in December
Bethany, PA

Average wind speed in December - Bethany, PA
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is February (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in December
Bethany, PA

Average humidity in December - Bethany, PA
  • Average humidity in December: 85%

The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is July (77%).

Average rainfall in December
Bethany, PA

Average rainfall in December - Bethany, PA
  • Average rainfall in December: 1.46"

The wettest months (with the highest rainfall) are July and August (2.09").
The driest months (with the least rainfall) are January and September (1.14").

Average rainfall days in December
Bethany, PA

Average rainfall days in December - Bethany, PA
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is May (15.6 days).
The months with the least rainy days are January and February (6.9 days).

Average snowfall in December
Bethany, PA

Average snowfall in December - Bethany, PA
  • Average snowfall in December: 3.27"

The months with the highest snowfall are January and December (3.27").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Bethany, PA

Average snowfall days in December - Bethany, PA
  • Average snowfall days in December: 8.2 days

The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Bethany, 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).

Average sunshine days in December
Bethany, PA

Average sunshine days in December - Bethany, PA
  • Average sunshine days in December: 15.2 days

The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (12.5 days).

Average UV index in December
Bethany, PA

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

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

Average cloud cover in December
Bethany, PA

Average cloud cover in December - Bethany, PA
  • Average cloud cover in December: 62

The months with the most cloud cover are February and December (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 38).

Average visibility in December
Bethany, PA

Average visibility in December - Bethany, 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).

Bethany, Pennsylvania, USA

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