December weather forecastSandy Hook, CT
December
Weather in December
The first month of the winter, December, is still a cold month in Sandy Hook, Connecticut, with temperature in the range of an average low of 29.3°F (-1.5°C) and an average high of 39.6°F (4.2°C).Temperature
As Sandy Hook, Connecticut, enters December, the average high-temperature decreases from the a frosty 48.7°F (9.3°C) of November to a wintry 39.6°F (4.2°C). During December, Sandy Hook's temperature falls to a steady low-temperature average of 29.3°F (-1.5°C).Humidity
The average relative humidity in December in Sandy Hook is 78%.Rainfall
The month with the most rainfall is December, when the rain falls for 12 days and typically aggregates up to 4.02" (102mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Sandy Hook, Connecticut, during December, snow falls for 5.8 days and regularly aggregates up to 3.58" (91mm) of snow. Throughout the year, in Sandy Hook, there are 34.5 snowfall days, and 17.01" (432mm) of snow is accumulated.Daylight
December has the shortest days of the year in Sandy Hook, Connecticut, with an average of 9h and 12min of daylight.On the first day of December in Sandy Hook, sunrise is at 7:00 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:33 pm EST.
Sunshine
In December, the average sunshine 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 reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sandy Hook, CT
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in December
Sandy Hook, CT
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Sandy Hook, CT
- Average wind speed in December: 8.1mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Sandy Hook, CT
- Average humidity in December: 78%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Sandy Hook, CT
- Average rainfall in December: 4.02"
The wettest month (with the highest rainfall) is December (4.02").
The driest months (with the least rainfall) are January and September (2.4").
Average rainfall days in December
Sandy Hook, CT
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in December
Sandy Hook, CT
- Average snowfall in December: 3.58"
The month with the highest snowfall is February (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sandy Hook, CT
- Average snowfall days in December: 5.8 days
The month with the highest number of snowfall days is February (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sandy Hook, CT
- 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 months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Sandy Hook, CT
- Average sunshine days in December: 14.1 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in December
Sandy Hook, CT
- 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
Sandy Hook, CT
- Average cloud cover in December: 49
The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Sandy Hook, CT
- 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).
