December weather forecastBrooklyn, PA
December
Weather in December
December, the first month of the winter in Brooklyn, is still a cold month, with an average temperature ranging between min 24.6°F (-4.1°C) and max 34.3°F (1.3°C).Temperature
Brooklyn experiences a temperature shift at the start of December, with average high-temperatures adjusting from a frosty 44.2°F (6.8°C) in November to a wintry 34.3°F (1.3°C). An average low-temperature of 24.6°F (-4.1°C) is observed during December nights.Humidity
The average relative humidity in December is 85%.Rainfall
In December, the rain falls for 10.9 days. Throughout December, 2.36" (60mm) of precipitation is accumulated. In Brooklyn, during the entire year, the rain falls for 163.7 days and collects up to 32.05" (814mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Brooklyn, in December, during 15.5 snowfall days, 7.52" (191mm) of snow is typically accumulated. In Brooklyn, during the entire year, snow falls for 80.1 days and aggregates up to 41.93" (1065mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:11 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:42 pm EST.
Sunshine
In December, the average sunshine is 3.2h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 translates into these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Brooklyn, PA
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in December: 24.6°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Brooklyn, PA
- Average pressure in December: 30.08"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
Brooklyn, PA
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are January and February (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Brooklyn, PA
- Average humidity in December: 85%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (78%).
Average rainfall in December
Brooklyn, PA
- Average rainfall in December: 2.36"
The wettest month (with the highest rainfall) is August (3.27").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days in December
Brooklyn, PA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in December
Brooklyn, PA
- Average snowfall in December: 7.52"
The month with the highest snowfall is February (10.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Brooklyn, PA
- Average snowfall days in December: 15.5 days
The months with the highest number of snowfall days are January and February (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Brooklyn, PA
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 6min).
Average sunshine days in December
Brooklyn, PA
- Average sunshine days in December: 9.4 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in December
Brooklyn, PA
- 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
Brooklyn, PA
- Average cloud cover in December: 68
The month with the most cloud cover is February (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in December
Brooklyn, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
