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 onset of December brings a small shift in high-temperatures, falling from a cool 53.4°F (11.9°C) in November to a chilly 45.3°F (7.4°C). During December, Stoney Brook sees a mean low-temperature of 32.9°F (0.5°C).Humidity
May, October and December, with an average relative humidity of 76%, are the most humid months in Stoney Brook.Rainfall
In Stoney Brook, in December, during 10.2 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. Throughout the year, there are 161.3 rainfall days, and 33.19" (843mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Stoney Brook. In Stoney Brook, during December, snow falls for 2.9 days and regularly aggregates up to 1.38" (35mm) of snow. In Stoney Brook, during the entire year, snow falls for 17.1 days and aggregates up to 10.2" (259mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of December in Stoney Brook, Maryland, sunrise is at 7:09 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:56 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 4.9h of sunshine.UV index
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Stoney Brook. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A daily high UV index of 2 in December leads to these guidelines:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
What are the temperatures in Stoney Brook in December?
What is the most humid month in Stoney Brook?
What is the average humidity in December in Stoney Brook?
How many days does it rain in December in Stoney Brook?
How many days does it snow in December in Stoney Brook?
What is the month with the shortest days in Stoney Brook?
How many hours of daylight does Stoney Brook have in December?
What time are sunrise and sunset in December in Stoney Brook?
What is the month with the least sunshine in Stoney Brook?
How many hours of sunshine does Stoney Brook have in December?
What is the month with the lowest UV index in Stoney Brook?
What is the UV index reading in December in Stoney Brook?
Average temperature in December
Stoney Brook, MD
- Average high temperature in December: 45.3°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in December
Stoney Brook, MD
- 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
Stoney Brook, MD
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Stoney Brook, MD
- Average humidity in December: 76%
The months with the highest relative humidity are May, October and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
Stoney Brook, MD
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in December
Stoney Brook, MD
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in December
Stoney Brook, MD
- Average snowfall in December: 1.38"
The months with the highest snowfall are January and March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Stoney Brook, MD
- Average snowfall days in December: 2.9 days
The months with the highest number of snowfall days are January and February (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
Stoney Brook, MD
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in December
Stoney Brook, MD
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (19.5 days).
The months with the least sunshine days are May and July (11 days).
Average UV index in December
Stoney Brook, MD
- 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, November and December (UV index 2).
Average cloud cover in December
Stoney Brook, MD
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Stoney Brook, MD
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Stoney Brook, Maryland, USA
Weather forecast for your location
2. Allow the app to use your location
