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 coincides with a reduction in the average high-temperature, falling from a fresh 50°F (10°C) in November to a wintry 40.8°F (4.9°C). In New Canaan, a slight decrease from the daytime peak is noted during the month of December, with an average low-temperature of 31.8°F (-0.1°C).Humidity
February, May, June, October and December, with an average relative humidity of 76%, are the most humid months in New Canaan.Rainfall
The month with the most rainfall is December, when the rain falls for 12.3 days and typically aggregates up to 4.17" (106mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In New Canaan, Connecticut, during December, snow falls for 5.1 days and regularly aggregates up to 2.6" (66mm) of snow. Throughout the year, there are 28.5 snowfall days, and 11.65" (296mm) of snow is accumulated.Daylight
December has the shortest days of the year in New Canaan, Connecticut, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:26 pm. On the last day of December, in New Canaan, sunrise is at 7:19 am and sunset at 4:35 pm EST.
Sunshine
In New Canaan, the average sunshine in December is 4.8h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 2 during December, leads to the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in New Canaan during December?
What are the most humid months in New Canaan?
What is the average humidity in December in New Canaan?
What is the rainiest month in New Canaan?
How much does it rain in New Canaan in December?
How much does it snow in New Canaan in December?
What is the month with the shortest days in New Canaan?
How many hours of daylight does New Canaan have in December?
When is the sunrise / sunset in December in New Canaan?
How long on average sun shines in December in New Canaan?
What is the month with the lowest UV index in New Canaan?
What is the UV index reading in December in New Canaan?
Average temperature in December
New Canaan, CT
- Average high temperature in December: 40.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in December: 31.8°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in December
New Canaan, 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
New Canaan, CT
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
New Canaan, CT
- Average humidity in December: 76%
The months with the highest relative humidity are February, May, June, October and December (76%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
New Canaan, CT
- Average rainfall in December: 4.17"
The wettest month (with the highest rainfall) is December (4.17").
The driest month (with the least rainfall) is January (2.44").
Average rainfall days in December
New Canaan, CT
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in December
New Canaan, CT
- Average snowfall in December: 2.6"
The month with the highest snowfall is February (3.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
New Canaan, CT
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is February (8.3 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
New Canaan, CT
- 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
New Canaan, CT
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in December
New Canaan, 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
New Canaan, CT
- Average cloud cover in December: 48
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
New Canaan, CT
- 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).
New Canaan, Connecticut, USA
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