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
In December, the average high-temperature decreases from a frosty 48°F (8.9°C) in November to a wintry 38.5°F (3.6°C). An average low-temperature of 27.3°F (-2.6°C) marks the nights throughout December.Humidity
The average relative humidity in December is 85%.Rainfall
In McGrann, in December, during 12.6 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, there are 182.9 rainfall days, and 34.88" (886mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in McGrann. In December, it is snowing for 13 days. Throughout December, 4.69" (119mm) of snow is accumulated. Throughout the year, in McGrann, there are 64.2 snowfall days, and 24.25" (616mm) 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 the month, sunrise is at 7:23 am and sunset at 4:51 pm. On the last day of December, in McGrann, Pennsylvania, sunrise is at 7:42 am and sunset at 5:00 pm EST.
Sunshine
The average sunshine in December is 3.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 1 during December leads to these advisories:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
How cold is it in McGrann in December?
What is the average humidity in December in McGrann?
How much does it rain in McGrann in December?
How much does it snow in McGrann in December?
What is the month with the shortest days in McGrann?
How many hours of daylight does McGrann have in December?
What time are sunrise and sunset in December in McGrann?
How long on average sun shines in December in McGrann?
What are the months with the lowest UV index in McGrann?
What is the UV index intensity in December in McGrann?
Average temperature in December
McGrann, PA
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (82°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 (60.4°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
McGrann, 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 (29.95"Hg).
Average wind speed in December
McGrann, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
McGrann, PA
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
McGrann, PA
- Average rainfall in December: 2.8"
The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is November (2.17").
Average rainfall days in December
McGrann, PA
- Average rainfall days in December: 12.6 days
The month with the highest number of rainy days is May (20.3 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in December
McGrann, PA
- Average snowfall in December: 4.69"
The month with the highest snowfall is January (6.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
McGrann, PA
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
McGrann, 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: 3h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in December
McGrann, PA
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is November (14.1 days).
The month with the least sunshine days is February (7 days).
Average UV index in December
McGrann, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
McGrann, PA
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
McGrann, 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).
McGrann, Pennsylvania, USA
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