December weather forecastPalmyra, PA
December
Weather in December
December, the first month of the winter in Palmyra, is also an icy month, with an average temperature varying between 41°F (5°C) and 29.5°F (-1.4°C).Temperature
Palmyra's transition into December involves a gentle shift in temperature, receding from a frosty 49.8°F (9.9°C) in November to an icy 41°F (5°C). Throughout the month of December, Palmyra witnesses an average low-temperature of 29.5°F (-1.4°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In Palmyra, during December, the rain falls for 12 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Palmyra, during the entire year, the rain falls for 162.3 days and collects up to 30.71" (780mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Palmyra, in December, snow falls for 5.2 days, with typically accumulated 1.73" (44mm) of snow. Throughout the year, there are 27.8 snowfall days, and 13.23" (336mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:10 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:50 pm EST.
Sunshine
In December, the average sunshine is 4.6h.UV index
January through March, 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 minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Palmyra, PA
- Average high temperature in December: 41°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in December: 29.5°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in December
Palmyra, PA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Palmyra, PA
- Average wind speed in December: 7.9mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Palmyra, PA
- Average humidity in December: 79%
The months with the highest relative humidity are February and May (81%).
The months with the lowest relative humidity are March and April (76%).
Average rainfall in December
Palmyra, PA
- Average rainfall in December: 2.44"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in December
Palmyra, PA
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in December
Palmyra, PA
- Average snowfall in December: 1.73"
The month with the highest snowfall is January (3.94").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Palmyra, PA
- Average snowfall days in December: 5.2 days
The month with the highest number of snowfall days is January (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
Palmyra, PA
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Palmyra, PA
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10 days).
Average UV index in December
Palmyra, PA
- Average UV index in December: 2
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Palmyra, PA
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Palmyra, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are February, May, September and October (5mi).
