December weather forecastMount Cobb, PA
December
Weather in December
The first month of the winter, December, is also an icy month in Mount Cobb, Pennsylvania, with an average temperature fluctuating between 35.2°F (1.8°C) and 24.8°F (-4°C).Temperature
December comes with a drop in the average high-temperature, falling from November's chilly 45.1°F (7.3°C) to an icy 35.2°F (1.8°C). An average low-temperature of 24.8°F (-4°C) is noted during the month of December.Humidity
February and December, with an average relative humidity of 85%, are the most humid months in Mount Cobb.Rainfall
In Mount Cobb, in December, during 10.9 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. Throughout the year, in Mount Cobb, there are 161.6 rainfall days, and 33.19" (843mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Mount Cobb, during December, snow falls for 12.7 days and regularly aggregates up to 7.01" (178mm) of snow. Throughout the year, there are 69.6 snowfall days, and 39.41" (1001mm) 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 the month, sunrise is at 7:09 am and sunset at 4:33 pm. On the last day of December, in Mount Cobb, sunrise is at 7:28 am and sunset at 4:42 pm EST.
Sunshine
In Mount Cobb, the average sunshine in December is 3.5h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mount Cobb, PA
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 24.8°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in December
Mount Cobb, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Mount Cobb, PA
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are January, February and March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Mount Cobb, PA
- Average humidity in December: 85%
The months with the highest relative humidity are February and December (85%).
The months with the lowest relative humidity are April, June and July (78%).
Average rainfall in December
Mount Cobb, PA
- Average rainfall in December: 2.72"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Mount Cobb, PA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is January (7.7 days).
Average snowfall in December
Mount Cobb, PA
- Average snowfall in December: 7.01"
The month with the highest snowfall is February (9.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mount Cobb, PA
- Average snowfall days in December: 12.7 days
The month with the highest number of snowfall days is January (16 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Cobb, PA
- Average daylight in December: 9h and 12min
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 12min).
- Average sunshine in December: 3h and 30min
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 18min).
Average sunshine days in December
Mount Cobb, PA
- Average sunshine days in December: 11.3 days
The months with the most sunshine days are September and November (14.7 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in December
Mount Cobb, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Mount Cobb, PA
- Average cloud cover in December: 65
The months with the most cloud cover are February and December (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 39).
Average visibility in December
Mount Cobb, 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).
