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 average high-temperature decreases in December, shifting from a chilly 46.8°F (8.2°C) in November to a wintry 37.2°F (2.9°C). An average low-temperature of 26.2°F (-3.2°C) marks the month of December.Humidity
In December, the average relative humidity is 87%.Rainfall
In Harrisville, in December, during 12.5 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, there are 180.3 rainfall days, and 35.39" (899mm) of precipitation is accumulated.Snowfall
Months with snowfall in Harrisville are January through May, October through December. In Harrisville, in December, snow falls for 16.6 days, with typically accumulated 6.14" (156mm) of snow. Throughout the year, there are 79.6 snowfall days, and 33.62" (854mm) of snow is accumulated.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 7:26 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 5:01 pm EST.
Sunshine
In Harrisville, Pennsylvania, the average sunshine in December is 2.8h.UV index
December is the month with the lowest UV index in Harrisville, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 1 in December leads to these recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. 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 average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days in Harrisville?
How many hours of daylight does Harrisville 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
Harrisville, PA
- Average high temperature in December: 37.2°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 (30.7°F).
- Average low temperature in December: 26.2°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
Harrisville, 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
Harrisville, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Harrisville, PA
- Average humidity in December: 87%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April, May, June, July and August (79%).
Average rainfall in December
Harrisville, PA
- Average rainfall in December: 2.8"
The wettest month (with the highest rainfall) is April (3.66").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days in December
Harrisville, PA
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Harrisville, PA
- Average snowfall in December: 6.14"
The month with the highest snowfall is January (9.33").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Harrisville, PA
- Average snowfall days in December: 16.6 days
The month with the highest number of snowfall days is January (20.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harrisville, 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: 2h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
Harrisville, PA
- Average sunshine days in December: 7.5 days
The month with the most sunshine days is November (12.8 days).
The month with the least sunshine days is February (5.8 days).
Average UV index in December
Harrisville, 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
Harrisville, PA
- Average cloud cover in December: 71
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
Harrisville, PA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
Harrisville, Pennsylvania, USA
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