Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The onset of December brings a small change in high-temperatures, falling from a frosty 45.7°F (7.6°C) in November to a cold 36°F (2.2°C). During the month of December, the temperature generally drops to a low average of 25.7°F (-3.5°C).Humidity
February and December, with an average relative humidity of 84%, are the most humid months.Rainfall
In Harveys Lake, during December, the rain falls for 10.3 days and regularly aggregates up to 2.17" (55mm) of precipitation. Throughout the year, there are 166.2 rainfall days, and 30.83" (783mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Harveys Lake, during December, snow falls for 11.1 days and regularly aggregates up to 4.33" (110mm) of snow. Throughout the year, there are 57.9 snowfall days, and 29.53" (750mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:11 am and sunset at 4:35 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:44 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 in Harveys Lake. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A maximum high UV index of 1 in December translates into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Harveys Lake have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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
Harveys Lake, 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).
Harveys Lake, Pennsylvania, USA
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