December weather forecast
Clifton Heights, PA

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Weather in December

The first month of the winter, December, is also a frosty month in Clifton Heights, Pennsylvania, with an average temperature ranging between min 32.7°F (0.4°C) and max 44.1°F (6.7°C).

Temperature

December's onset introduces a mild reduction in the average high-temperature, from a fresh 52.7°F (11.5°C) in November to a chilly 44.1°F (6.7°C). Clifton Heights's temperature tends to fall to an average low of 32.7°F (0.4°C) during the nights of December.

Humidity

February, October and December, with an average relative humidity of 77%, are the most humid months.

Rainfall

In Clifton Heights, during December, the rain falls for 9.6 days and regularly aggregates up to 2.4" (61mm) of precipitation. In Clifton Heights, during the entire year, the rain falls for 142 days and collects up to 24.41" (620mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Clifton Heights, in December, during 1.5 snowfall days, 0.75" (19mm) of snow is typically accumulated. Throughout the year, there are 11.3 snowfall days, and 6.18" (157mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:04 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:46 pm EST.

Sunshine

In Clifton Heights, the average sunshine in December is 5.1h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 2 during December translates into the following guidance:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

December temperatures in Clifton Heights vary between a high-temperature of 44.1°F (6.7°C) and a low-temperature of 32.7°F (0.4°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is estimated at 91.4°F (33°C).

What is the most humid month?

The months with the highest humidity are February, October and December, with an average relative humidity of 77%.

What is the average humidity in December in Clifton Heights?

The average relative humidity in December is 77%.

How many days does it rain in December?

In Clifton Heights, in December, during 9.6 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Clifton Heights, in December, during 1.5 snowfall days, 0.75" (19mm) of snow is typically accumulated.

What is the month with the shortest days?

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

How many hours of daylight does Clifton Heights have in December?

In December, the average day length is 9h and 23min.

What time are sunrise and sunset in December?

On the first day of December in Clifton Heights, sunrise is at 7:04 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:46 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 5.1h.

When is the lowest UV index?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents 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
Clifton Heights, PA

Average temperature in December - Clifton Heights, PA
  • Average high temperature in December: 44.1°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in December: 32.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

Average pressure in December
Clifton Heights, PA

Average pressure in December - Clifton Heights, 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
Clifton Heights, PA

Average wind speed in December - Clifton Heights, PA
  • Average wind speed in December: 7.8mph

The windiest months (with the highest average wind speed) are February, March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in December
Clifton Heights, PA

Average humidity in December - Clifton Heights, PA
  • Average humidity in December: 77%

The months with the highest relative humidity are February, October and December (77%).
The month with the lowest relative humidity is April (71%).

Average rainfall in December
Clifton Heights, PA

Average rainfall in December - Clifton Heights, PA
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is August (2.95").
The driest month (with the least rainfall) is January (1.46").

Average rainfall days in December
Clifton Heights, PA

Average rainfall days in December - Clifton Heights, PA
  • Average rainfall days in December: 9.6 days

The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is January (6.6 days).

Average snowfall in December
Clifton Heights, PA

Average snowfall in December - Clifton Heights, PA
  • Average snowfall in December: 0.75"

The month with the highest snowfall is March (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Clifton Heights, PA

Average snowfall days in December - Clifton Heights, PA
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Clifton Heights, PA

Average daylight in December / Average sunshine in December - Clifton Heights, 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: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in December
Clifton Heights, PA

Average sunshine days in December - Clifton Heights, PA
  • Average sunshine days in December: 19.7 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (12.1 days).

Average UV index in December
Clifton Heights, PA

Average UV index in December - Clifton Heights, PA
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Clifton Heights, PA

Average cloud cover in December - Clifton Heights, PA
  • Average cloud cover in December: 46

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in December
Clifton Heights, PA

Average visibility in December - Clifton Heights, PA
  • Average visibility in December: 6mi

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

Clifton Heights, Pennsylvania, USA

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