December weather forecastSuffern, NY
December
Weather in December
The first month of the winter, December, is also a wintry month in Suffern, New York, with temperature in the range of an average low of 29.1°F (-1.6°C) and an average high of 40.1°F (4.5°C).Temperature
With December's onset, the average high-temperature recedes from November's fresh 50°F (10°C) to an icy 40.1°F (4.5°C). Throughout December, Suffern anticipates an average low-temperature of 29.1°F (-1.6°C).Humidity
February and December, with an average relative humidity of 79%, are the most humid months in Suffern.Rainfall
December is the month with the most rainfall in Suffern. Rain falls for 10.8 days and accumulates 2.68" (68mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Suffern, New York, during December, snow falls for 5.1 days and regularly aggregates up to 1.81" (46mm) of snow. In Suffern, during the entire year, snow falls for 28.5 days and aggregates up to 10.98" (279mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:03 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:38 pm EST.
Sunshine
The average sunshine in December is 4.8h.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 reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Keep in mind! Snow's reflective quality can nearly 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
Suffern, NY
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in December: 29.1°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in December
Suffern, 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
Suffern, NY
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Suffern, NY
- Average humidity in December: 79%
The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Suffern, NY
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is December (2.68").
The driest month (with the least rainfall) is September (1.34").
Average rainfall days in December
Suffern, NY
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Suffern, NY
- Average snowfall in December: 1.81"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Suffern, NY
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Suffern, NY
- Average daylight in December: 9h and 18min
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 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Suffern, NY
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Suffern, 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
Suffern, NY
- Average cloud cover in December: 48
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Suffern, NY
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are February and May (5mi).
