December weather forecastGarrison, NY
December
Weather in December
December, the first month of the winter in Garrison, is still a cold month, with an average temperature varying between 39°F (3.9°C) and 27.7°F (-2.4°C).Temperature
Garrison's December weather comes with a decrease in average high-temperatures, moving from a frosty 48.7°F (9.3°C) in November to a cold 39°F (3.9°C). The average temperature during December nights dips to a subzero cold 27.7°F (-2.4°C).Humidity
February, October and December, with an average relative humidity of 80%, are the most humid months.Rainfall
The month with the most rainfall is December, when the rain falls for 10 days and typically aggregates up to 3.23" (82mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Garrison, during December, snow falls for 5.1 days and regularly aggregates up to 2.8" (71mm) of snow. Throughout the year, there are 27.3 snowfall days, and 14.45" (367mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:27 pm. On the last day of December, in Garrison, sunrise is at 7:21 am and sunset at 4:36 pm EST.
Sunshine
In Garrison, the average sunshine in December is 4.7h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 2 in December suggests the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Garrison, NY
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in December
Garrison, 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
Garrison, NY
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is March (7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Garrison, NY
- Average humidity in December: 80%
The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Garrison, NY
- Average rainfall in December: 3.23"
The wettest month (with the highest rainfall) is December (3.23").
The driest months (with the least rainfall) are January and September (1.97").
Average rainfall days in December
Garrison, NY
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Garrison, NY
- Average snowfall in December: 2.8"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Garrison, NY
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Garrison, NY
- Average daylight in December: 9h and 12min
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 12min).
- Average sunshine in December: 4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Garrison, NY
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Garrison, NY
- Average UV index in December: 2
The months with the highest UV index are June 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
Garrison, NY
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Garrison, NY
- Average visibility in December: 6mi
The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).
