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 commencement of December involves a temperature shift, with the average high-temperature dropping from a chilly 49.8°F (9.9°C) in November to a wintry 40.1°F (4.5°C). Deemston's nighttime temperature during December is consistently averaged at a freezing cold 28.9°F (-1.7°C).Humidity
In Deemston, the average relative humidity in December is 83%.Rainfall
In December, the rain falls for 11.9 days. Throughout December, 2.05" (52mm) of precipitation is accumulated. In Deemston, during the entire year, the rain falls for 170.8 days and collects up to 25.2" (640mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Deemston, in December, snow falls for 11.6 days, with typically accumulated 2.8" (71mm) of snow. Throughout the year, in Deemston, Pennsylvania, there are 54.5 snowfall days, and 14.41" (366mm) 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 7:23 am and sunset at 4:55 pm. On the last day of December, in Deemston, sunrise is at 7:41 am and sunset at 5:04 pm EST.
Sunshine
The average sunshine in December in Deemston is 3.5h.UV index
The months with the lowest UV index in Deemston are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 2 in December suggests the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
How cold does it get in Deemston in December?
What is the average humidity in December in Deemston?
How many days does it rain in December in Deemston?
How many days does it snow in December in Deemston?
What is the month with the shortest days in Deemston?
How many hours of daylight does Deemston have in December?
When is the sunrise / sunset in December in Deemston?
How many hours of sunshine does Deemston have in December?
When is the lowest UV index in Deemston?
What is the UV index reading in December in Deemston?
Average temperature in December
Deemston, PA
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Deemston, 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
Deemston, PA
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Deemston, PA
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April, July and August (76%).
Average rainfall in December
Deemston, PA
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is November (1.54").
Average rainfall days in December
Deemston, PA
- Average rainfall days in December: 11.9 days
The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
Deemston, PA
- Average snowfall in December: 2.8"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Deemston, PA
- Average snowfall days in December: 11.6 days
The month with the highest number of snowfall days is January (16.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Deemston, 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 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Deemston, PA
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in December
Deemston, 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
Deemston, PA
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Deemston, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, August and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, September, October and December (5mi).
Deemston, Pennsylvania, USA
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