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 arrival of December signals a shift in temperature, down from a fresh 51.4°F (10.8°C) in November to a wintry 42.4°F (5.8°C). During the month of December, the nighttime temperature falls to an average of 30.7°F (-0.7°C).Humidity
The average relative humidity in December is 78%.Rainfall
In Deer Park, in December, it is raining for 11.3 days, with typically 2.87" (73mm) of accumulated precipitation. In Deer Park, Pennsylvania, during the entire year, the rain falls for 158.5 days and collects up to 28.31" (719mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Deer Park, in December, snow falls for 3.7 days, with typically accumulated 1.42" (36mm) of snow. Throughout the year, in Deer Park, there are 23 snowfall days, and 9.45" (240mm) of snow is accumulated.Daylight
December has the shortest days of the year in Deer Park, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:43 pm EST.
Sunshine
In December, the average sunshine in Deer Park, Pennsylvania, is 4.9h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. To protect against the Sun's most potent rays, avoid direct exposure around midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
How cold does it get in Deer Park in December?
What is the average humidity in December in Deer Park?
How many days does it rain in December in Deer Park?
How many days does it snow in December in Deer Park?
What is the month with the shortest days in Deer Park?
What is the average length of the day in December in Deer Park?
What time are sunrise and sunset in December in Deer Park?
How long on average sun shines in December in Deer Park?
What is the month with the lowest UV index in Deer Park?
What is the UV index intensity in December in Deer Park?
Average temperature in December
Deer Park, PA
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in December
Deer Park, 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
Deer Park, PA
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Deer Park, PA
- Average humidity in December: 78%
The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (74%).
Average rainfall in December
Deer Park, PA
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is July (2.99").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in December
Deer Park, PA
- Average rainfall days in December: 11.3 days
The months with the highest number of rainy days are May and July (16.8 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in December
Deer Park, PA
- Average snowfall in December: 1.42"
The month with the highest snowfall is March (2.91").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Deer Park, PA
- Average snowfall days in December: 3.7 days
The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Deer Park, 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: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Deer Park, PA
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in December
Deer Park, PA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (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
Deer Park, PA
- Average cloud cover in December: 48
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Deer Park, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Deer Park, Pennsylvania, USA
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