December weather forecastPorters Sideling, PA
December
Weather in December
The first month of the winter, December, is still a cold month in Porters Sideling, Pennsylvania, with temperature in the range of an average high of 42.1°F (5.6°C) and an average low of 30.4°F (-0.9°C).Temperature
With the onset of December, Porters Sideling experiences a modest temperature adjustment, with the average high-temperature receding from a fresh 51.1°F (10.6°C) in November to an icy 42.1°F (5.6°C). Porters Sideling, during December nights, observes an average temperature of 30.4°F (-0.9°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In Porters Sideling, in December, during 10.9 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. Throughout the year, there are 164.9 rainfall days, and 32.68" (830mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Porters Sideling, during December, snow falls for 5.1 days and regularly aggregates up to 1.85" (47mm) of snow. In Porters Sideling, during the entire year, snow falls for 26.7 days and aggregates up to 14.37" (365mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:10 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:53 pm EST.
Sunshine
The average sunshine in December in Porters Sideling 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 estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Porters Sideling, PA
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in December
Porters Sideling, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Porters Sideling, PA
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Porters Sideling, PA
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are March, April and November (76%).
Average rainfall in December
Porters Sideling, PA
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is August (3.39").
The driest month (with the least rainfall) is September (2.2").
Average rainfall days in December
Porters Sideling, PA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
Porters Sideling, PA
- Average snowfall in December: 1.85"
The month with the highest snowfall is March (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Porters Sideling, PA
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Porters Sideling, PA
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
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 42min).
Average sunshine days in December
Porters Sideling, PA
- Average sunshine days in December: 16.2 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is May (10.5 days).
Average UV index in December
Porters Sideling, 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
Porters Sideling, PA
- Average cloud cover in December: 47
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Porters Sideling, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
