December weather forecast
Holbrook, PA

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Weather in December

The first month of the winter, December, is also an icy month in Holbrook, Pennsylvania, with an average temperature ranging between min 28.9°F (-1.7°C) and max 40.6°F (4.8°C).

Temperature

The arrival of December indicates a decrease in the average high-temperature, moving from a cool 50.2°F (10.1°C) in November to an icy 40.6°F (4.8°C). In Holbrook, the nighttime temperature averages to a freezing cold 28.9°F (-1.7°C) during December.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In Holbrook, in December, during 12.9 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. Throughout the year, there are 183 rainfall days, and 30.91" (785mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Holbrook, in December, during 11.9 snowfall days, 3.98" (101mm) of snow is typically accumulated. Throughout the year, there are 56.4 snowfall days, and 20.35" (517mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:24 am and sunset at 4:56 pm. On the last day of December, sunrise is at 7:42 am and sunset at 5:06 pm EST.

Sunshine

In December, the average sunshine is 3.7h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in December?

An average high-temperature, in December, in Holbrook, is 40.6°F (4.8°C) and the average low-temperature is 28.9°F (-1.7°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in August is estimated at 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 83%.

How much does it rain in December?

In Holbrook, during December, the rain falls for 12.9 days and regularly aggregates up to 2.52" (64mm) of precipitation.

How many days does it snow in December?

In Holbrook, in December, during 11.9 snowfall days, 3.98" (101mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 9h and 24min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:24 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:06 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 3.7h.

What is the month with the lowest UV index?

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

What is the UV index reading in December?

In Holbrook, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health 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
Holbrook, PA

Average temperature in December - Holbrook, PA
  • Average high temperature in December: 40.6°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in December: 28.9°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure in December
Holbrook, PA

Average pressure in December - Holbrook, 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).

Average wind speed in December
Holbrook, PA

Average wind speed in December - Holbrook, PA
  • Average wind speed in December: 6.8mph

The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).

Average humidity in December
Holbrook, PA

Average humidity in December - Holbrook, PA
  • Average humidity in December: 83%

The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in December
Holbrook, PA

Average rainfall in December - Holbrook, PA
  • Average rainfall in December: 2.52"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is November (1.77").

Average rainfall days in December
Holbrook, PA

Average rainfall days in December - Holbrook, PA
  • Average rainfall days in December: 12.9 days

The month with the highest number of rainy days is May (20.7 days).
The month with the least rainy days is February (10.6 days).

Average snowfall in December
Holbrook, PA

Average snowfall in December - Holbrook, PA
  • Average snowfall in December: 3.98"

The month with the highest snowfall is February (5.35").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Holbrook, PA

Average snowfall days in December - Holbrook, PA
  • Average snowfall days in December: 11.9 days

The month with the highest number of snowfall days is January (16.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Holbrook, 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 24min).

  • Average sunshine in December: 3h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).

Average sunshine days in December
Holbrook, PA

Average sunshine days in December - Holbrook, PA
  • Average sunshine days in December: 10.6 days

The month with the most sunshine days is November (15.7 days).
The month with the least sunshine days is February (7.5 days).

Average UV index in December
Holbrook, PA

Average UV index in December - Holbrook, 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, November and December (UV index 2).

Average cloud cover in December
Holbrook, PA

Average cloud cover in December - Holbrook, PA
  • Average cloud cover in December: 63

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in December
Holbrook, PA

Average visibility in December - Holbrook, PA
  • Average visibility in December: 5mi

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

Holbrook, Pennsylvania, USA

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