December weather forecast
Glenlake, PA

Share

Weather in December

December, the first month of the winter in Glenlake, is also a frosty month, with an average temperature ranging between max 43.7°F (6.5°C) and min 32.4°F (0.2°C).

Temperature

December brings a slight decrease in temperature, down from a cool 52.3°F (11.3°C) in November to a frosty 43.7°F (6.5°C). Glenlake records an average low-temperature of 32.4°F (0.2°C) throughout the month of December.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Glenlake, in December, during 10.9 rainfall days, 3.19" (81mm) of precipitation is typically accumulated. In Glenlake, during the entire year, the rain falls for 154.4 days and collects up to 31.38" (797mm) of precipitation.

Snowfall

Months with snowfall are January through May, November and December. In December, it is snowing for 2.8 days. Throughout December, 1.22" (31mm) of snow is accumulated. Throughout the year, there are 15.9 snowfall days, and 8.5" (216mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:03 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:43 pm EST.

Sunshine

The average sunshine in December is 5h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 2 suggests these recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Around midday, solar radiation is most harmful; hence, exposure should be limited. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Updated: Jul 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Glenlake?

An average high-temperature, in December, in Glenlake, is 43.7°F (6.5°C) and the average low-temperature is 32.4°F (0.2°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in August is computed to be 89.6°F (32°C).

What is the average humidity in December?

In December, the average relative humidity is 77%.

How much does it rain in December?

In December, in Glenlake, the rain falls for 10.9 days. Throughout December, 3.19" (81mm) of precipitation is accumulated.

How many days does it snow in December in Glenlake?

In December, it is snowing for 2.8 days. Throughout December, 1.22" (31mm) of snow is 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 Glenlake have in December?

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

When is the sunrise / sunset in December?

On the first day of December in Glenlake, sunrise is at 7:03 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:43 pm EST.

How many hours of sunshine does Glenlake have in December?

In Glenlake, the average sunshine duration in December is 5h.

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.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to 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
Glenlake, PA

Average temperature in December - Glenlake, PA
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in December: 32.4°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure in December
Glenlake, PA

Average pressure in December - Glenlake, PA
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Glenlake, PA

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

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in December
Glenlake, PA

Average humidity in December - Glenlake, PA
  • Average humidity in December: 77%

The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Glenlake, PA

Average rainfall in December - Glenlake, PA
  • Average rainfall in December: 3.19"

The wettest month (with the highest rainfall) is July (3.66").
The driest month (with the least rainfall) is January (1.89").

Average rainfall days in December
Glenlake, PA

Average rainfall days in December - Glenlake, PA
  • Average rainfall days in December: 10.9 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is January (8 days).

Average snowfall in December
Glenlake, PA

Average snowfall in December - Glenlake, PA
  • Average snowfall in December: 1.22"

The month with the highest snowfall is March (2.99").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Glenlake, PA

Average snowfall days in December - Glenlake, PA
  • Average snowfall days in December: 2.8 days

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Glenlake, 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 0min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in December
Glenlake, PA

Average sunshine days in December - Glenlake, PA
  • Average sunshine days in December: 18.1 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in December
Glenlake, PA

Average UV index in December - Glenlake, 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
Glenlake, PA

Average cloud cover in December - Glenlake, PA
  • Average cloud cover in December: 46

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Glenlake, PA

Average visibility in December - Glenlake, PA
  • Average visibility in December: 6mi

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

Glenlake, Pennsylvania, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location