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
December's arrival correlates with a reduction in the average high-temperature, down from a frosty 45.5°F (7.5°C) in November to an icy 36.3°F (2.4°C). Lake Harmony's average low-temperature in the month of December is recorded at a subzero cold 25.5°F (-3.6°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 84%.Rainfall
In Lake Harmony, in December, during 12.5 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. In Lake Harmony, during the entire year, the rain falls for 173.5 days and collects up to 36.57" (929mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 12.3 days. Throughout December, 6.89" (175mm) of snow is accumulated. In Lake Harmony, during the entire year, snow falls for 62.9 days and aggregates up to 38.11" (968mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:08 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:44 pm EST.
Sunshine
The average sunshine in December is 3.9h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high UV index of 1 in December translates into the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Lake Harmony?
What are the most humid months in Lake Harmony?
What is the average humidity in December?
How many days does it rain in December in Lake Harmony?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Lake Harmony have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Lake Harmony, PA
- Average high temperature in December: 36.3°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Lake Harmony, 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
Lake Harmony, PA
- Average wind speed in December: 8mph
The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Lake Harmony, 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
Lake Harmony, PA
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is July (3.66").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Lake Harmony, PA
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is February (9.2 days).
Average snowfall in December
Lake Harmony, PA
- Average snowfall in December: 6.89"
The month with the highest snowfall is January (9.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lake Harmony, PA
- Average snowfall days in December: 12.3 days
The month with the highest number of snowfall days is January (15.4 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 Harmony, PA
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in December
Lake Harmony, PA
- Average sunshine days in December: 12.4 days
The month with the most sunshine days is September (14.8 days).
The month with the least sunshine days is February (9.4 days).
Average UV index in December
Lake Harmony, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Lake Harmony, PA
- Average cloud cover in December: 60
The months with the most cloud cover are February and December (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in December
Lake Harmony, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Lake Harmony, Pennsylvania, USA
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