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
The shift from November to December involves a decrease in the average high-temperature, dropping from a chilly 49.8°F (9.9°C) to a cold 40.1°F (4.5°C). During December, the average low-temperature is recorded at a freezing cold 28.6°F (-1.9°C).Humidity
In Graysville, the average relative humidity in December is 83%.Rainfall
In Graysville, in December, it is raining for 13.2 days, with typically 3.11" (79mm) of accumulated precipitation. In Graysville, during the entire year, the rain falls for 184.2 days and collects up to 35.75" (908mm) of precipitation.Snowfall
Months with snowfall in Graysville, Pennsylvania, are January through May, October through December. In Graysville, during December, snow falls for 12.9 days and regularly aggregates up to 5" (127mm) of snow. In Graysville, during the entire year, snow falls for 61.5 days and aggregates up to 25.98" (660mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:24 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:06 pm EST.
Sunshine
The average sunshine in December is 3.5h.UV index
The months with the lowest UV index in Graysville are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 2 during December translates into these guidelines:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
How cold does it get in Graysville in December?
What is the average humidity in December in Graysville?
How many days does it rain in December in Graysville?
How much does it snow in Graysville in December?
What is the month with the shortest days in Graysville?
What is the average length of the day in December in Graysville?
When is the sunrise / sunset in December in Graysville?
How long on average sun shines in December in Graysville?
What is the month with the lowest UV index in Graysville?
What is the UV index reading in December in Graysville?
Average temperature in December
Graysville, PA
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in December
Graysville, 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
Graysville, PA
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Graysville, PA
- Average humidity in December: 83%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
Graysville, PA
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is November (2.24").
Average rainfall days in December
Graysville, PA
- Average rainfall days in December: 13.2 days
The month with the highest number of rainy days is May (20.8 days).
The month with the least rainy days is January (10.7 days).
Average snowfall in December
Graysville, PA
- Average snowfall in December: 5"
The month with the highest snowfall is February (6.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Graysville, PA
- Average snowfall days in December: 12.9 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Graysville, 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 August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Graysville, PA
- Average sunshine days in December: 10.4 days
The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is January (7.5 days).
Average UV index in December
Graysville, PA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Graysville, PA
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Graysville, 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).
Graysville, Pennsylvania, USA
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