December weather forecast
Sygan Hill, PA

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Weather in December

December, the first month of the winter in Sygan Hill, is also an icy month, with an average temperature varying between 39.7°F (4.3°C) and 28.4°F (-2°C).

Temperature

December involves a decrease in temperature, down from a chilly 49.3°F (9.6°C) in November to a wintry 39.7°F (4.3°C). During December, the temperature is averaged to a low of 28.4°F (-2°C) at night.

Humidity

In Sygan Hill, the average relative humidity in December is 83%.

Rainfall

In Sygan Hill, Pennsylvania, in December, it is raining for 8.2 days, with typically 0.87" (22mm) of accumulated precipitation. In Sygan Hill, during the entire year, the rain falls for 132.6 days and collects up to 11.5" (292mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Sygan Hill. In December, it is snowing for 6.4 days. Throughout December, 0.59" (15mm) of snow is accumulated. Throughout the year, in Sygan Hill, there are 32.5 snowfall days, and 3.66" (93mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Sygan Hill, 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 4:54 pm. On the last day of December, in Sygan Hill, sunrise is at 7:43 am and sunset at 5:04 pm EST.

Sunshine

In Sygan Hill, Pennsylvania, the average sunshine in December is 3.4h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index in Sygan Hill. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Boost your sun resistance with garments that are densely woven yet spacious. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in Sygan Hill in December?

In Sygan Hill, 39.7°F (4.3°C) is the average high-temperature and 28.4°F (-2°C) is the average low-temperature during December. In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 87.8°F (31°C).

What is the average humidity in December in Sygan Hill?

In December, the average relative humidity in Sygan Hill is 83%.

How many days does it rain in December in Sygan Hill?

In Sygan Hill, Pennsylvania, during December, the rain falls for 8.2 days and regularly aggregates up to 0.87" (22mm) of precipitation.

How much does it snow in Sygan Hill in December?

In Sygan Hill, in December, during 6.4 snowfall days, 0.59" (15mm) of snow is typically accumulated.

What is the month with the shortest days in Sygan Hill?

The month with the shortest days in Sygan Hill is December, with an average of 9h and 24min of daylight.

How many hours of daylight does Sygan Hill have in December?

The average day length in December is 9h and 21min.

When are sunrise and sunset in December in Sygan Hill?

On the first day of December in Sygan Hill, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:04 pm EST.

How long on average sun shines in December in Sygan Hill?

In Sygan Hill, the average sunshine duration in December is 3.4h.

When is the lowest UV index in Sygan Hill?

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

What is the UV index intensity in December in Sygan Hill?

In December, the average daily maximum UV index is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability 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
Sygan Hill, PA

Average temperature in December - Sygan Hill, PA
  • Average high temperature in December: 39.7°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 28.4°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).

Average pressure in December
Sygan Hill, PA

Average pressure in December - Sygan Hill, PA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Sygan Hill, PA

Average wind speed in December - Sygan Hill, PA
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).

Average humidity in December
Sygan Hill, PA

Average humidity in December - Sygan Hill, PA
  • Average humidity in December: 83%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are July and August (75%).

Average rainfall in December
Sygan Hill, PA

Average rainfall in December - Sygan Hill, PA
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is November (0.67").

Average rainfall days in December
Sygan Hill, PA

Average rainfall days in December - Sygan Hill, PA
  • Average rainfall days in December: 8.2 days

The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is February (6.4 days).

Average snowfall in December
Sygan Hill, PA

Average snowfall in December - Sygan Hill, PA
  • Average snowfall in December: 0.59"

The month with the highest snowfall is February (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Sygan Hill, PA

Average snowfall days in December - Sygan Hill, PA
  • Average snowfall days in December: 6.4 days

The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Sygan Hill, PA

Average daylight in December / Average sunshine in December - Sygan Hill, 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 2min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in December
Sygan Hill, PA

Average sunshine days in December - Sygan Hill, PA
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.2 days).

Average UV index in December
Sygan Hill, PA

Average UV index in December - Sygan Hill, PA
  • Average UV index in December: 1

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Sygan Hill, PA

Average cloud cover in December - Sygan Hill, PA
  • Average cloud cover in December: 64

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in December
Sygan Hill, PA

Average visibility in December - Sygan Hill, PA
  • Average visibility in December: 5mi

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

Sygan Hill, Pennsylvania, USA

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