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 corresponds with a shift in temperature, down from a chilly 43.7°F (6.5°C) in November to a cold 33.1°F (0.6°C). During the nights of December, Berwyn maintains an almost steady temperature with an average low of 24.3°F (-4.3°C).Humidity
In December, the average relative humidity is 87%.Rainfall
In Berwyn, in December, it is raining for 5.8 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, in Berwyn, there are 114.4 rainfall days, and 10.59" (269mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Berwyn, in December, during 11.8 snowfall days, 2.01" (51mm) of snow is typically accumulated. Throughout the year, in Berwyn, there are 67.3 snowfall days, and 12.32" (313mm) of snow is accumulated.Daylight
The month with the shortest days in Berwyn is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:15 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:40 pm EST.
Sunshine
In December, the average sunshine is 2.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 1 during December, leads to the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
How cold is it in Berwyn in December?
What is the average humidity in December in Berwyn?
How much does it rain in Berwyn in December?
How much does it snow in Berwyn in December?
What is the month with the shortest days in Berwyn?
What is the average length of the day in December in Berwyn?
When is the sunrise / sunset in December in Berwyn?
How many hours of sunshine does Berwyn have in December?
What is the month with the lowest UV index in Berwyn?
What is the UV index intensity in December in Berwyn?
Average temperature in December
Berwyn, NY
- Average high temperature in December: 33.1°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 24.3°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Berwyn, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Berwyn, NY
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in December
Berwyn, NY
- Average humidity in December: 87%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April and May (79%).
Average rainfall in December
Berwyn, NY
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is May (1.18").
The driest month (with the least rainfall) is September (0.63").
Average rainfall days in December
Berwyn, NY
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is July (14.5 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in December
Berwyn, NY
- Average snowfall in December: 2.01"
The month with the highest snowfall is November (2.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Berwyn, NY
- Average snowfall days in December: 11.8 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Berwyn, NY
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 2h and 24min).
Average sunshine days in December
Berwyn, NY
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is October (18.2 days).
The months with the least sunshine days are February and July (12.9 days).
Average UV index in December
Berwyn, NY
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Berwyn, NY
- Average cloud cover in December: 71
The month with the most cloud cover is February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in December
Berwyn, NY
- Average visibility in December: 6mi
The months with the highest visibility are April, May, October, November and December (6mi).
The months with the lowest visibility are January, February, March, June, July, August and September (5mi).
Berwyn, New York, USA
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