December weather forecast
Lopez, PA

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Weather in December

December, the first month of the winter in Lopez, is also a wintry month, with an average temperature ranging between max 36°F (2.2°C) and min 25.7°F (-3.5°C).

Temperature

The onset of December results in a decrease in the average high-temperature, receding from a frosty 45.7°F (7.6°C) in November to a wintry 36°F (2.2°C). Lopez's nighttime temperature in December falls to an average of 25.7°F (-3.5°C).

Humidity

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

Rainfall

In Lopez, in December, during 10.3 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, there are 166.2 rainfall days, and 30.83" (783mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Lopez, during December, snow falls for 11.1 days and regularly aggregates up to 4.33" (110mm) of snow. In Lopez, Pennsylvania, during the entire year, snow falls for 57.9 days and aggregates up to 29.53" (750mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 12min of daylight.
On the first day of December, sunrise is at 7:12 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:45 pm EST.

Sunshine

The average sunshine in December is 3.8h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 1 during December translates into the following guidance:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Updated: Jul 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

Lopez in December has an average high-temperature of 36°F (2.2°C) and an average low-temperature of 25.7°F (-3.5°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in July is computed to be 86°F (30°C).

What are the most humid months?

February and December, with an average relative humidity of 84%, are most humid months.

What is the average humidity in December?

In December, the average relative humidity in Lopez is 84%.

How many days does it rain in December?

In Lopez, in December, it is raining for 10.3 days, with typically 2.17" (55mm) of accumulated precipitation.

How much does it snow in December?

In December, it is snowing for 11.1 days. Throughout December, 4.33" (110mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year in Lopez, with an average of 9h and 12min of daylight.

How many hours of daylight does Lopez have in December?

The average day length in December is 9h and 14min.

When is the sunrise / sunset in December in Lopez?

On the first day of December in Lopez, sunrise is at 7:12 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:45 pm EST.

How many hours of sunshine does Lopez have in December?

In December, the average sunshine duration is 3.8h.

What are the months with the lowest UV index?

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

How high is the UV index in December?

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

Average temperature in December - Lopez, PA
  • Average high temperature in December: 36°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (29.8°F).

  • Average low temperature in December: 25.7°F

The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

Average pressure in December
Lopez, PA

Average pressure in December - Lopez, 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
Lopez, PA

Average wind speed in December - Lopez, PA
  • Average wind speed in December: 7.6mph

The windiest months (with the highest average wind speed) are March and April (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in December
Lopez, PA

Average humidity in December - Lopez, 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
Lopez, PA

Average rainfall in December - Lopez, PA
  • Average rainfall in December: 2.17"

The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is January (2.01").

Average rainfall days in December
Lopez, PA

Average rainfall days in December - Lopez, PA
  • Average rainfall days in December: 10.3 days

The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in December
Lopez, PA

Average snowfall in December - Lopez, PA
  • Average snowfall in December: 4.33"

The month with the highest snowfall is February (8.66").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Lopez, PA

Average snowfall days in December - Lopez, PA
  • Average snowfall days in December: 11.1 days

The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Lopez, PA
  • Average daylight in December: 9h and 1min

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 12min).

  • Average sunshine in December: 3h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).

Average sunshine days in December
Lopez, PA

Average sunshine days in December - Lopez, PA
  • Average sunshine days in December: 13.7 days

The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is July (8.8 days).

Average UV index in December
Lopez, PA

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

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Lopez, PA

Average cloud cover in December - Lopez, PA
  • Average cloud cover in December: 62

The months with the most cloud cover are February and December (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 37).

Average visibility in December
Lopez, PA

Average visibility in December - Lopez, 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).

Lopez, Pennsylvania, USA

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