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 move into December indicates a reduction in the average high-temperature, down from November's chilly 45.3°F (7.4°C) to a wintry 36.1°F (2.3°C). Harborcreek records a slight downturn to an average a subzero cold 28.6°F (-1.9°C) during the nights of December.Humidity
In Harborcreek, the average relative humidity in December is 84%.Rainfall
In December, the rain falls for 10.4 days. Throughout December, 2.24" (57mm) of precipitation is accumulated. Throughout the year, there are 169.5 rainfall days, and 25.87" (657mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Harborcreek, during December, snow falls for 15.3 days and regularly aggregates up to 3.74" (95mm) of snow. Throughout the year, there are 71.3 snowfall days, and 18.54" (471mm) 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 December, sunrise is at 7:29 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 4:58 pm EST.
Sunshine
The average sunshine in December is 2.6h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In December, a regular UV index of 1 translates into these guidelines:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Enhance your sun protection with tightly woven, yet airy clothing. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
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?
How many hours of daylight does Harborcreek have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Harborcreek, PA
- Average high temperature in December: 36.1°F
The warmest month (with the highest average high temperature) is July (75°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Harborcreek, PA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Harborcreek, PA
- Average wind speed in December: 12.6mph
The windiest month (with the highest average wind speed) is January (13mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in December
Harborcreek, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are August, September, October and November (79%).
Average rainfall in December
Harborcreek, PA
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is October (2.72").
The driest month (with the least rainfall) is March (1.73").
Average rainfall days in December
Harborcreek, PA
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is October (18.6 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Harborcreek, PA
- Average snowfall in December: 3.74"
The month with the highest snowfall is February (4.88").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Harborcreek, PA
- Average snowfall days in December: 15.3 days
The month with the highest number of snowfall days is January (17.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harborcreek, PA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
Harborcreek, PA
- Average sunshine days in December: 6.6 days
The month with the most sunshine days is May (11.7 days).
The month with the least sunshine days is January (5.7 days).
Average UV index in December
Harborcreek, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Harborcreek, PA
- Average cloud cover in December: 73
The month with the most cloud cover is January (Cloud cover 77).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in December
Harborcreek, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Harborcreek, Pennsylvania, USA
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