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 the onset of December, Upper Brookville's climate undergoes a slight change as the average high-temperature moves from a fresh 51.1°F (10.6°C) in November to a cold 42.4°F (5.8°C). Upper Brookville's nighttime temperature in December shows a minor descent, with a steady average of 34.7°F (1.5°C).Humidity
The months with the highest humidity are February, May and December, with an average relative humidity of 75%.Rainfall
December is the month with the most rainfall in Upper Brookville. Rain falls for 12.9 days and accumulates 4.06" (103mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Upper Brookville, in December, during 3.5 snowfall days, 1.54" (39mm) of snow is typically accumulated. In Upper Brookville, during the entire year, snow falls for 22.2 days and aggregates up to 7.24" (184mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Upper Brookville.On the first day of the month, sunrise is at 6:59 am and sunset at 4:27 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:36 pm EST.
Sunshine
The average sunshine in December in Upper Brookville is 4.9h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Upper Brookville. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In December, an average UV index of 2 transforms into the following instructions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
How cold does it get in Upper Brookville in December?
What is the most humid month in Upper Brookville?
What is the average humidity in December in Upper Brookville?
What is the wettest month in Upper Brookville?
How many days does it rain in December in Upper Brookville?
How much does it snow in Upper Brookville in December?
What is the month with the shortest days in Upper Brookville?
What is the average length of the day in December in Upper Brookville?
When is the sunrise / sunset in December in Upper Brookville?
How many hours of sunshine does Upper Brookville have in December?
What is the month with the lowest UV index in Upper Brookville?
What is the UV index reading in December in Upper Brookville?
Average temperature in December
Upper Brookville, NY
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in December: 34.7°F
The months with the highest average low temperature are July and August (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in December
Upper Brookville, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Upper Brookville, NY
- Average wind speed in December: 10.8mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in December
Upper Brookville, NY
- Average humidity in December: 75%
The months with the highest relative humidity are February, May and December (75%).
The months with the lowest relative humidity are August and November (71%).
Average rainfall in December
Upper Brookville, NY
- Average rainfall in December: 4.06"
The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the least rainfall) is September (2.4").
Average rainfall days in December
Upper Brookville, NY
- Average rainfall days in December: 12.9 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
Upper Brookville, NY
- Average snowfall in December: 1.54"
The month with the highest snowfall is March (2.01").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Upper Brookville, NY
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Upper Brookville, NY
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 5min
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
Upper Brookville, NY
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in December
Upper Brookville, NY
- Average UV index in December: 2
The months with the highest UV index are 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
Upper Brookville, NY
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in December
Upper Brookville, NY
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Upper Brookville, New York, USA
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