December weather forecast
Hawthorn, PA

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Weather in December

The first month of the winter, December, is also an icy month in Hawthorn, Pennsylvania, with an average temperature fluctuating between 25.5°F (-3.6°C) and 36.5°F (2.5°C).

Temperature

In the transition to December, Hawthorn observes a drop in the average high-temperature, moving from a frosty 45.7°F (7.6°C) in November to an icy 36.5°F (2.5°C). In Hawthorn, the nighttime temperature averages to a freezing cold 25.5°F (-3.6°C) during December.

Humidity

The average relative humidity in December is 86%.

Rainfall

In Hawthorn, in December, during 10.2 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, there are 150.5 rainfall days, and 22.05" (560mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Hawthorn, during December, snow falls for 13.5 days and regularly aggregates up to 3.74" (95mm) of snow. Throughout the year, there are 72.4 snowfall days, and 22.28" (566mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:23 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:41 am and sunset at 4:58 pm EST.

Sunshine

The average sunshine in December is 2.7h.

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 minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Stay sun-safe with clothing that is both closely woven and worn loosely. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in Hawthorn in December?

In Hawthorn, 36.5°F (2.5°C) is the average high-temperature and 25.5°F (-3.6°C) is the average low-temperature during December. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in July is evaluated at 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 86%.

How much does it rain in December?

In Hawthorn, in December, during 10.2 rainfall days, 1.61" (41mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Hawthorn, during December, snow falls for 13.5 days and regularly aggregates up to 3.74" (95mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

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

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:23 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 4:58 pm EST.

How long on average sun shines in December?

In Hawthorn, the average sunshine duration in December is 2.7h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index 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
Hawthorn, PA

Average temperature in December - Hawthorn, PA
  • Average high temperature in December: 36.5°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (30.2°F).

  • Average low temperature in December: 25.5°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).

Average pressure in December
Hawthorn, PA

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

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Hawthorn, PA

Average wind speed in December - Hawthorn, PA
  • Average wind speed in December: 8.3mph

The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in December
Hawthorn, PA

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

The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are June, July and August (78%).

Average rainfall in December
Hawthorn, PA

Average rainfall in December - Hawthorn, PA
  • Average rainfall in December: 1.61"

The wettest month (with the highest rainfall) is April (2.56").
The driest month (with the least rainfall) is November (1.26").

Average rainfall days in December
Hawthorn, PA

Average rainfall days in December - Hawthorn, PA
  • Average rainfall days in December: 10.2 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.2 days).

Average snowfall in December
Hawthorn, PA

Average snowfall in December - Hawthorn, PA
  • Average snowfall in December: 3.74"

The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Hawthorn, PA

Average snowfall days in December - Hawthorn, PA
  • Average snowfall days in December: 13.5 days

The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Hawthorn, 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: 2h and 4min

The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

Average sunshine days in December
Hawthorn, PA

Average sunshine days in December - Hawthorn, PA
  • Average sunshine days in December: 11.4 days

The month with the most sunshine days is November (15.3 days).
The month with the least sunshine days is February (8.1 days).

Average UV index in December
Hawthorn, PA

Average UV index in December - Hawthorn, 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
Hawthorn, PA

Average cloud cover in December - Hawthorn, PA
  • Average cloud cover in December: 72

The month with the most cloud cover is January (Cloud cover 76).
The months with the least cloud cover are July and August (Cloud cover 39).

Average visibility in December
Hawthorn, PA

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

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

Hawthorn, Pennsylvania, USA

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