December weather forecast
Slatedale, PA

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Weather in December

December, the first month of the winter in Slatedale, is also an icy month, with temperature in the range of an average low of 27.5°F (-2.5°C) and an average high of 38.3°F (3.5°C).

Temperature

The decrease of average high-temperatures is mild in December, with a decline from a chilly 48.2°F (9°C) in November to an icy 38.3°F (3.5°C). Slatedale, during the month of December, experiences an average low-temperature of 27.5°F (-2.5°C).

Humidity

The average relative humidity in December is 82%.

Rainfall

In December, the rain falls for 11.6 days. Throughout December, 2.48" (63mm) of precipitation is accumulated. Throughout the year, there are 155.1 rainfall days, and 29.45" (748mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Slatedale are January through May, October through December. In Slatedale, during December, snow falls for 4.6 days and regularly aggregates up to 2.6" (66mm) of snow. In Slatedale, during the entire year, snow falls for 34 days and aggregates up to 16.73" (425mm) of snow.

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 7:08 am and sunset at 4:35 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:45 pm EST.

Sunshine

The average sunshine in December is 4.5h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 1 during December morphs into the following directions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Updated: Jun 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

December temperatures in Slatedale vary between a high-temperature of 38.3°F (3.5°C) and a low-temperature of 27.5°F (-2.5°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in July is appraised at 87.8°F (31°C).

What is the average humidity in December?

In Slatedale, the average relative humidity in December is 82%.

How many days does it rain in December?

In Slatedale, in December, during 11.6 rainfall days, 2.48" (63mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Slatedale, in December, snow falls for 4.6 days, with typically accumulated 2.6" (66mm) 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.

How many hours of daylight does Slatedale have in December?

In December, the average day length is 9h and 19min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:45 pm EST.

How long on average sun shines in December?

In Slatedale, the average sunshine duration in December is 4.5h.

When is the lowest UV index in Slatedale?

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

What is the UV index reading in December?

In Slatedale, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health risk 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
Slatedale, PA

Average temperature in December - Slatedale, PA
  • Average high temperature in December: 38.3°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in December: 27.5°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).

Average pressure in December
Slatedale, PA

Average pressure in December - Slatedale, 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
Slatedale, PA

Average wind speed in December - Slatedale, PA
  • Average wind speed in December: 7.7mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in December
Slatedale, PA

Average humidity in December - Slatedale, PA
  • Average humidity in December: 82%

The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are April and July (77%).

Average rainfall in December
Slatedale, PA

Average rainfall in December - Slatedale, PA
  • Average rainfall in December: 2.48"

The wettest month (with the highest rainfall) is July (3.03").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in December
Slatedale, PA

Average rainfall days in December - Slatedale, PA
  • Average rainfall days in December: 11.6 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.6 days).

Average snowfall in December
Slatedale, PA

Average snowfall in December - Slatedale, PA
  • Average snowfall in December: 2.6"

The months with the highest snowfall are January and March (4.41").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Slatedale, PA

Average snowfall days in December - Slatedale, PA
  • Average snowfall days in December: 4.6 days

The month with the highest number of snowfall days is February (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Slatedale, 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 18min).

  • Average sunshine in December: 4h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

Average sunshine days in December
Slatedale, PA

Average sunshine days in December - Slatedale, PA
  • Average sunshine days in December: 16.9 days

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (11.3 days).

Average UV index in December
Slatedale, PA

Average UV index in December - Slatedale, PA
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Slatedale, PA

Average cloud cover in December - Slatedale, PA
  • Average cloud cover in December: 52

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 35).

Average visibility in December
Slatedale, PA

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

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

Slatedale, Pennsylvania, USA

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