December weather forecast
Stonington, CT

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The classy and nice riverside homes by the Mystic River in Stonington, Connecticut
The classy and nice riverside homes by the Mystic River in Stonington, Connecticut

Weather in December

December marks the arrival of winter in Stonington, with temperatures dropping significantly. Snowfall shows a noticeable increase compared to November, enhancing the winter feels in the city. The city witnesses its shortest daylight hours during this month, contributing to the cold weather conditions. Stylish winter attire becomes the norm, as locals and tourists alike embrace the winter chill. With New Year's Eve celebrations, the city bids farewell to the year on a high note, anticipating a fresh start with January.

Temperature

December ushers in a minor alteration in Stonington's climate, with the average high-temperature moving from November's fresh 51.3°F (10.7°C) to a wintry 42.3°F (5.7°C). Stonington, in December, logs an average low-temperature of 33.4°F (0.8°C), a subtle step down from daytime readings.

Humidity

In Stonington, the average relative humidity in December is 75%.

Rainfall

The month with the most rainfall is December, when the rain falls for 13.4 days and typically aggregates up to 3.86" (98mm) of precipitation.

Snowfall

Months with snowfall in Stonington are January through April, October through December. In Stonington, in December, during 4.5 snowfall days, 1.18" (30mm) of snow is typically accumulated. In Stonington, during the entire year, snow falls for 24.7 days and aggregates up to 7.87" (200mm) of snow.

Daylight

December has the shortest days of the year in Stonington, Connecticut, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 6:54 am and sunset at 4:19 pm. On the last day of December, sunrise is at 7:13 am and sunset at 4:28 pm EST.

Sunshine

February and December, with an average of 4.9h of sunshine, are months with the least sunshine in Stonington.

UV index

January through March 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 ordinary individuals.
Note: The UV index of 2 during December translates into the following guidance:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Boost your sun resistance with garments that are densely woven yet spacious. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
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Frequently asked questions

Is it cold in Stonington during December?

In December, in Stonington, the average high-temperature is 42.3°F (5.7°C), and the average low-temperature is 33.4°F (0.8°C).

What is the average humidity in December in Stonington?

The average relative humidity in December in Stonington is 75%.

What is the rainiest month in Stonington?

December is the month with the most rainfall. Rain falls for 13.4 days and accumulates 3.86" (98mm) of precipitation.

How many days does it rain in December in Stonington?

In Stonington, in December, it is raining for 13.4 days, with typically 3.86" (98mm) of accumulated precipitation.

How much does it snow in Stonington in December?

In Stonington, in December, during 4.5 snowfall days, 1.18" (30mm) of snow is typically accumulated.

What is the month with the shortest days in Stonington?

With an average of 9h and 18min of daylight, December has the shortest days of the year in Stonington.

What is the average length of the day in December in Stonington?

In Stonington, the average day length in December is 9h and 15min.

What time are sunrise and sunset in December in Stonington?

On the first day of December in Stonington, Connecticut, sunrise is at 6:54 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:28 pm EST.

What are the months with the least sunshine in Stonington?

The months with the least sunshine in Stonington, Connecticut, are February and December, with an average of 4.9h of sunshine.

How long on average sun shines in December in Stonington?

In Stonington, the average sunshine duration in December is 4.9h.

What is the month with the lowest UV index in Stonington?

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index intensity in December in Stonington?

In Stonington, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Stonington, CT

Average temperature in December - Stonington, CT
  • Average high temperature in December: 42.3°F

The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (36.5°F).

  • Average low temperature in December: 33.4°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).

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Average pressure in December
Stonington, CT

Average pressure in December - Stonington, CT
  • Average pressure in December: 30.04"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Stonington, CT

Average wind speed in December - Stonington, CT
  • Average wind speed in December: 11.9mph

The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).

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Average humidity in December
Stonington, CT

Average humidity in December - Stonington, CT
  • Average humidity in December: 75%

The month with the highest relative humidity is June (81%).
The months with the lowest relative humidity are January, March, April and November (74%).

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Average rainfall in December
Stonington, CT

Average rainfall in December - Stonington, CT
  • Average rainfall in December: 3.86"

The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in December
Stonington, CT

Average rainfall days in December - Stonington, CT
  • Average rainfall days in December: 13.4 days

The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is February (10.1 days).

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Average snowfall in December
Stonington, CT

Average snowfall in December - Stonington, CT
  • Average snowfall in December: 1.18"

The month with the highest snowfall is March (2.44").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Stonington, CT

Average snowfall days in December - Stonington, CT
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Stonington, CT

Average daylight in December / Average sunshine in December - Stonington, 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 August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

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Average sunshine days in December
Stonington, CT

Average sunshine days in December - Stonington, CT
  • Average sunshine days in December: 14.2 days

The month with the most sunshine days is November (16.5 days).
The months with the least sunshine days are June and July (11.7 days).

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Average UV index in December
Stonington, CT

Average UV index in December - Stonington, 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 and December (UV index 2).

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Average cloud cover in December
Stonington, CT

Average cloud cover in December - Stonington, CT
  • Average cloud cover in December: 47

The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in December
Stonington, CT

Average visibility in December - Stonington, 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).

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Stonington, Connecticut, USA

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