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 arrival of December corresponds with a shift in temperature, down from a chilly 48.9°F (9.4°C) in November to an icy 38.5°F (3.6°C). Blue Hills's nights in December experience an average temperature drop to a subzero cold 27.7°F (-2.4°C).Humidity
In Blue Hills, the average relative humidity in December is 78%.Rainfall
In Blue Hills, during December, the rain falls for 7.6 days and regularly aggregates up to 0.94" (24mm) of precipitation. Throughout the year, there are 113.2 rainfall days, and 10.24" (260mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Blue Hills, in December, during 3.5 snowfall days, 0.79" (20mm) of snow is typically accumulated. Throughout the year, there are 21.5 snowfall days, and 4.45" (113mm) 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 6:59 am and sunset at 4:20 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:30 pm EST.
Sunshine
The average sunshine in December is 4.8h.UV index
The months with the lowest UV index in Blue Hills are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. When the Sun is at its strongest around midday, find shade and limit exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Blue Hills have in December?
What is the month with the lowest UV index?
How high is the UV index in December in Blue Hills?
Average temperature in December
Blue Hills, CT
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Blue Hills, CT
- Average pressure in December: 30.05"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
Blue Hills, CT
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in December
Blue Hills, 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 (70%).
Average rainfall in December
Blue Hills, CT
- Average rainfall in December: 0.94"
The wettest months (with the highest rainfall) are June and July (1.06").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in December
Blue Hills, CT
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is July (11.8 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in December
Blue Hills, CT
- Average snowfall in December: 0.79"
The month with the highest snowfall is February (1.14").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Blue Hills, CT
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is February (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Blue Hills, CT
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Blue Hills, CT
- Average sunshine days in December: 19.5 days
The months with the most sunshine days are January and November (20.4 days).
The month with the least sunshine days is June (16.3 days).
Average UV index in December
Blue Hills, 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
Blue Hills, CT
- Average cloud cover in December: 48
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Blue Hills, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
Blue Hills, Connecticut, USA
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