December weather forecast
Troy, PA

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Weather in December

December, the first month of the winter in Troy, is also an icy month, with an average temperature varying between 25.5°F (-3.6°C) and 34.7°F (1.5°C).

Temperature

December ushers in a slight temperature change, with average high-temperatures reducing from November's chilly 44.8°F (7.1°C) to a wintry 34.7°F (1.5°C). During December, the average low-temperature is recorded at a freezing cold 25.5°F (-3.6°C).

Humidity

In December, the average relative humidity is 84%.

Rainfall

In Troy, during December, the rain falls for 12.5 days and regularly aggregates up to 2.09" (53mm) of precipitation. Throughout the year, there are 171.9 rainfall days, and 28.54" (725mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Troy, in December, during 15.1 snowfall days, 5.39" (137mm) of snow is typically accumulated. Throughout the year, there are 74.9 snowfall days, and 30.08" (764mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 12min of daylight.
On the first day of December, sunrise is at 7:15 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:46 pm EST.

Sunshine

February and December, with an average of 3.2h of sunshine, are months with the least sunshine.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 1 in December interprets into the following advice:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Updated: Jun 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

In December, in Troy, the average high-temperature is 34.7°F (1.5°C), and the average low-temperature is 25.5°F (-3.6°C).

What is the average humidity in December?

The average relative humidity in December is 84%.

How many days does it rain in December?

In December, the rain falls for 12.5 days. Throughout December, 2.09" (53mm) of precipitation is accumulated.

How much does it snow in December?

In Troy, in December, snow falls for 15.1 days, with typically accumulated 5.39" (137mm) of snow.

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 Troy, the average day length in December is 9h and 12min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:15 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:46 pm EST.

What are the months with the least sunshine?

The months with the least sunshine are February and December, with an average of 3.2h of sunshine.

How many hours of sunshine does Troy have in December?

The average sunshine duration in December is 3.2h.

What is the month with the lowest UV index?

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

What is the UV index intensity in December in Troy?

In December, the average daily maximum UV index in Troy is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from 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
Troy, PA

Average temperature in December - Troy, PA
  • Average high temperature in December: 34.7°F

The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in December: 25.5°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

Average pressure in December
Troy, PA

Average pressure in December - Troy, PA
  • Average pressure in December: 30.09"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
Troy, PA

Average wind speed in December - Troy, PA
  • Average wind speed in December: 8.2mph

The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in December
Troy, PA

Average humidity in December - Troy, PA
  • Average humidity in December: 84%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is July (78%).

Average rainfall in December
Troy, PA

Average rainfall in December - Troy, PA
  • Average rainfall in December: 2.09"

The wettest months (with the highest rainfall) are April and July (2.91").
The driest months (with the least rainfall) are January and November (1.77").

Average rainfall days in December
Troy, PA

Average rainfall days in December - Troy, PA
  • Average rainfall days in December: 12.5 days

The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (8.6 days).

Average snowfall in December
Troy, PA

Average snowfall in December - Troy, PA
  • Average snowfall in December: 5.39"

The month with the highest snowfall is February (7.2").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Troy, PA

Average snowfall days in December - Troy, PA
  • Average snowfall days in December: 15.1 days

The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Troy, PA
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 3h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are February and December (Average sunshine: 3h and 12min).

Average sunshine days in December
Troy, PA

Average sunshine days in December - Troy, PA
  • Average sunshine days in December: 8.9 days

The month with the most sunshine days is September (14 days).
The month with the least sunshine days is February (7.7 days).

Average UV index in December
Troy, PA

Average UV index in December - Troy, 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).

Average cloud cover in December
Troy, PA

Average cloud cover in December - Troy, PA
  • Average cloud cover in December: 67

The months with the most cloud cover are January, February and December (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 39).

Average visibility in December
Troy, PA

Average visibility in December - Troy, 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).

Troy, Pennsylvania, USA

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