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
As November shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a frosty 47.8°F (8.8°C) to a cold 38.5°F (3.6°C). Nightly temperatures drop to an average low of 27.3°F (-2.6°C) in December.Humidity
In December, the average relative humidity is 85%.Rainfall
In Donegal, in December, during 10.8 rainfall days, 3.03" (77mm) of precipitation is typically accumulated. In Donegal, during the entire year, the rain falls for 179.1 days and collects up to 33.43" (849mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Donegal, in December, during 12.5 snowfall days, 6.57" (167mm) of snow is typically accumulated. In Donegal, during the entire year, snow falls for 63.4 days and aggregates up to 34.17" (868mm) of snow.Daylight
December has the shortest days of the year in Donegal, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:21 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 5:02 pm EST.
Sunshine
In December, the average sunshine is 3.5h.UV index
January through March, October through 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 vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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?
What is the average length of the day in December?
When is the sunrise / sunset in December in Donegal?
How long on average sun shines in December in Donegal?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Donegal, PA
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in December
Donegal, 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 (29.95"Hg).
Average wind speed in December
Donegal, PA
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Donegal, PA
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April, June, July and August (78%).
Average rainfall in December
Donegal, PA
- Average rainfall in December: 3.03"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is November (1.97").
Average rainfall days in December
Donegal, PA
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is May (22.6 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in December
Donegal, PA
- Average snowfall in December: 6.57"
The month with the highest snowfall is January (7.99").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Donegal, PA
- Average snowfall days in December: 12.5 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Donegal, PA
- Average daylight in December: 9h and 2min
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: 3h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Donegal, PA
- Average sunshine days in December: 10.1 days
The month with the most sunshine days is November (14.6 days).
The month with the least sunshine days is May (7.4 days).
Average UV index in December
Donegal, PA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Donegal, PA
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Donegal, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
Donegal, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location