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
With December's onset, the average high-temperature recedes from November's fresh 52.2°F (11.2°C) to a chilly 42.8°F (6°C). In Sunnybrook, the nighttime temperature averages to a subzero cold 31.6°F (-0.2°C) during December.Humidity
The months with the highest humidity in Sunnybrook are February, October and December, with an average relative humidity of 78%.Rainfall
In December, the rain falls for 7.5 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. Throughout the year, in Sunnybrook, there are 122.4 rainfall days, and 12.68" (322mm) of precipitation is accumulated.Snowfall
Months with snowfall in Sunnybrook are January through April, November and December. In December, in Sunnybrook, it is snowing for 2.5 days. Throughout December, 0.71" (18mm) of snow is accumulated. In Sunnybrook, Pennsylvania, during the entire year, snow falls for 16.3 days and aggregates up to 4.72" (120mm) of snow.Daylight
December has the shortest days of the year in Sunnybrook, with an average of 9h and 24min of daylight.On the first day of December in Sunnybrook, sunrise is at 7:04 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:45 pm EST.
Sunshine
The average sunshine in December in Sunnybrook is 5h.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 reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 2 during December leads to these instructions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Frequently asked questions
Is it cold in Sunnybrook during December?
What are the most humid months in Sunnybrook?
What is the average humidity in December in Sunnybrook?
How much does it rain in Sunnybrook in December?
How many days does it snow in December in Sunnybrook?
What is the month with the shortest days in Sunnybrook?
What is the average length of the day in December in Sunnybrook?
When is the sunrise / sunset in December in Sunnybrook?
How many hours of sunshine does Sunnybrook have in December?
What are the months with the lowest UV index in Sunnybrook?
What is the UV index reading in December in Sunnybrook?
Average temperature in December
Sunnybrook, PA
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in December: 31.6°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in December
Sunnybrook, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Sunnybrook, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Sunnybrook, PA
- Average humidity in December: 78%
The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April, July and August (72%).
Average rainfall in December
Sunnybrook, PA
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is August (1.54").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in December
Sunnybrook, PA
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is November (6.4 days).
Average snowfall in December
Sunnybrook, PA
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Sunnybrook, PA
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Sunnybrook, 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: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Sunnybrook, PA
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (14.4 days).
Average UV index in December
Sunnybrook, 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
Sunnybrook, PA
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Sunnybrook, 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).
Sunnybrook, Pennsylvania, USA
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