December weather forecast
Spilt Rock, PA

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Weather in December

December, the first month of the winter in Spilt Rock, is still a cold month, with an average temperature varying between 36.3°F (2.4°C) and 25.5°F (-3.6°C).

Temperature

A change in temperatures is noted as November gives way to December, with average highs reducing from a frosty 45.5°F (7.5°C) to an icy 36.3°F (2.4°C). During December, Spilt Rock records a consistent average nighttime temperature of 25.5°F (-3.6°C).

Humidity

The months with the highest humidity are February and December, with an average relative humidity of 84%.

Rainfall

In Spilt Rock, in December, during 7.7 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, there are 121.5 rainfall days, and 10.51" (267mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Spilt Rock, in December, during 9.1 snowfall days, 1.38" (35mm) of snow is typically accumulated. In Spilt Rock, during the entire year, snow falls for 47 days and aggregates up to 8.23" (209mm) of snow.

Daylight

The month with the shortest days in Spilt Rock is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:08 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:44 pm EST.

Sunshine

In Spilt Rock, the average sunshine in December is 3.9h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In December, a daily UV index of 1 turns into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.

Frequently asked questions

How cold is December?

Spilt Rock in December has an average high-temperature of 36.3°F (2.4°C) and an average low-temperature of 25.5°F (-3.6°C).

What are the most humid months?

The months with the highest humidity are February and December, with an average relative humidity of 84%.

What is the average humidity in December?

The average relative humidity in December in Spilt Rock is 84%.

How much does it rain in December?

In December, the rain falls for 7.7 days. Throughout December, 0.75" (19mm) of precipitation is accumulated.

How many days does it snow in December?

In Spilt Rock, in December, snow falls for 9.1 days, with typically accumulated 1.38" (35mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

What is the average length of the day in December?

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

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:08 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:44 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 3.9h.

When is the lowest UV index?

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

What is the UV index reading in December?

The average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a low health threat 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
Spilt Rock, PA

Average temperature in December - Spilt Rock, PA
  • Average high temperature in December: 36.3°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in December: 25.5°F

The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).

Average pressure in December
Spilt Rock, PA

Average pressure in December - Spilt Rock, 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
Spilt Rock, PA

Average wind speed in December - Spilt Rock, PA
  • Average wind speed in December: 8mph

The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in December
Spilt Rock, PA

Average humidity in December - Spilt Rock, PA
  • Average humidity in December: 84%

The months with the highest relative humidity are February and December (84%).
The months with the lowest relative humidity are April, June and July (78%).

Average rainfall in December
Spilt Rock, PA

Average rainfall in December - Spilt Rock, PA
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is July (1.22").
The driest month (with the least rainfall) is September (0.51").

Average rainfall days in December
Spilt Rock, PA

Average rainfall days in December - Spilt Rock, PA
  • Average rainfall days in December: 7.7 days

The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is February (6.3 days).

Average snowfall in December
Spilt Rock, PA

Average snowfall in December - Spilt Rock, PA
  • Average snowfall in December: 1.38"

The months with the highest snowfall are January, February and March (1.73").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Spilt Rock, PA

Average snowfall days in December - Spilt Rock, PA
  • Average snowfall days in December: 9.1 days

The month with the highest number of snowfall days is February (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Spilt Rock, PA

Average daylight in December / Average sunshine in December - Spilt Rock, 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: 3h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

Average sunshine days in December
Spilt Rock, PA

Average sunshine days in December - Spilt Rock, PA
  • Average sunshine days in December: 18 days

The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (12.5 days).

Average UV index in December
Spilt Rock, PA

Average UV index in December - Spilt Rock, 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
Spilt Rock, PA

Average cloud cover in December - Spilt Rock, PA
  • Average cloud cover in December: 60

The months with the most cloud cover are February and December (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 38).

Average visibility in December
Spilt Rock, PA

Average visibility in December - Spilt Rock, 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).

Spilt Rock, Pennsylvania, USA

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