December weather forecast
Lake Denise, PA

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Weather in December

December, the first month of the winter in Lake Denise, is still a cold month, with an average temperature varying between 28.4°F (-2°C) and 39.9°F (4.4°C).

Temperature

Lake Denise's progression into December involves a drop in the average high-temperature, receding from a frosty 49.5°F (9.7°C) in November to a wintry 39.9°F (4.4°C). Lake Denise encounters an average low-temperature of 28.4°F (-2°C) during December nights.

Humidity

In December, the average relative humidity is 84%.

Rainfall

In Lake Denise, in December, during 12.7 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, there are 174.1 rainfall days, and 23.82" (605mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Lake Denise, Pennsylvania, during December, snow falls for 11.5 days and regularly aggregates up to 2.91" (74mm) of snow. In Lake Denise, during the entire year, snow falls for 54.8 days and aggregates up to 13.58" (345mm) of snow.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of December in Lake Denise, sunrise is at 7:22 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:03 pm EST.

Sunshine

In December, the average sunshine is 3.6h.

UV index

The month with the lowest UV index in Lake Denise is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 1 suggests these recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Frequently asked questions

Is December cold?

In December, the average high-temperature and low-temperature in Lake Denise are 39.9°F (4.4°C) and 28.4°F (-2°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in August is appraised at 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 84%.

How many days does it rain in December?

In Lake Denise, in December, it is raining for 12.7 days, with typically 1.97" (50mm) of accumulated precipitation.

How many days does it snow in December?

In Lake Denise, Pennsylvania, in December, during 11.5 snowfall days, 2.91" (74mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

How many hours of daylight does Lake Denise have in December?

In December, the average day length is 9h and 22min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:22 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:03 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 3.6h.

When is the lowest UV index?

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

What is the UV index reading in December?

In Lake Denise, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability 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
Lake Denise, PA

Average temperature in December - Lake Denise, PA
  • Average high temperature in December: 39.9°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (33.6°F).

  • Average low temperature in December: 28.4°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

Average pressure in December
Lake Denise, PA

Average pressure in December - Lake Denise, 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
Lake Denise, PA

Average wind speed in December - Lake Denise, PA
  • Average wind speed in December: 7.5mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in December
Lake Denise, PA

Average humidity in December - Lake Denise, PA
  • Average humidity in December: 84%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in December
Lake Denise, PA

Average rainfall in December - Lake Denise, PA
  • Average rainfall in December: 1.97"

The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is November (1.42").

Average rainfall days in December
Lake Denise, PA

Average rainfall days in December - Lake Denise, PA
  • Average rainfall days in December: 12.7 days

The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is February (10 days).

Average snowfall in December
Lake Denise, PA

Average snowfall in December - Lake Denise, PA
  • Average snowfall in December: 2.91"

The month with the highest snowfall is January (3.66").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Lake Denise, PA

Average snowfall days in December - Lake Denise, PA
  • Average snowfall days in December: 11.5 days

The month with the highest number of snowfall days is January (16.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Lake Denise, PA

Average daylight in December / Average sunshine in December - Lake Denise, 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 4min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in December
Lake Denise, PA

Average sunshine days in December - Lake Denise, PA
  • Average sunshine days in December: 9.5 days

The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is January (7.3 days).

Average UV index in December
Lake Denise, PA

Average UV index in December - Lake Denise, PA
  • Average UV index in December: 1

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

Average cloud cover in December
Lake Denise, PA

Average cloud cover in December - Lake Denise, 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
Lake Denise, PA

Average visibility in December - Lake Denise, PA
  • Average visibility in December: 5mi

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

Lake Denise, Pennsylvania, USA

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