December weather forecast
New London, CT

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A part of the city of New London, Connecticut, with intricate buildings overlooking the calm water
A part of the city of New London, Connecticut, with intricate buildings overlooking the calm water

Weather in December

December heralds the heart of winter in New London, Connecticut, illuminating the cityscape with holiday decorations. Weather during this month involves abundant snowfall, lower temperatures, and decreased daylight hours. Average temperatures range from 33.3°F to 41.9°F, accompanied by an increase in snowfall up to 1.22". While the cold sets in heavily, the Christmas spirit adds a special warmth to New London. The combination of icy weather and the holiday season makes December a magical time in the city.

Temperature

Stepping into December, New London observes a temperature decline, with the average high falling from November's cool 50.9°F to a cold 41.9°F. New London's average temperature throughout the nights in December exhibits a minor decrease from daytime highs, stabilizing at a still wintry 33.3°F.

Humidity

In New London, 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" of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In New London, during December, snow falls for 4.8 days and regularly aggregates up to 1.22" of snow. Throughout the year, in New London, there are 24 snowfall days, and 7.68" of snow is accumulated.

Ocean temperature

In New London, the average seawater temperature in December is 48.9°F.
Note: In 48.9°F, cold shock and rapid breathing can occur when swimming at temperatures below 50°F.

Daylight

The month with the shortest days in New London is December, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 6:54 am and sunset at 4:20 pm. On the last day of December, in New London, sunrise is at 7:14 am and sunset at 4:28 pm EST.

Sunshine

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

UV index

The months with the lowest UV index in New London are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

How cold is it in New London in December?

The high-temperature in New London during December is 41.9°F and the low-temperature is 33.3°F.

What is the average humidity in December in New London?

The average relative humidity in December is 75%.

What is the rainiest month in New London?

The month with the most rainfall in New London is December, when the rain falls for 13.4 days and typically aggregates up to 3.86" of precipitation.

How many days does it rain in December in New London?

In New London, in December, during 13.4 rainfall days, 3.86" of precipitation is typically accumulated.

How much does it snow in New London in December?

In New London, Connecticut, during December, snow falls for 4.8 days and regularly aggregates up to 1.22" of snow.

How cold is the water in December in New London?

In December, the average ocean temperature in New London, Connecticut, is 48.9°F. Swimming in 48.9°F is considered life-threatening. Even a few minutes in 55.4°F water is uncomfortable, and swimming below 50°F may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days in New London?

The month with the shortest days in New London is December, with an average of 9h and 12min of daylight.

What is the average length of the day in December in New London?

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

When are sunrise and sunset in December in New London?

On the first day of December, sunrise is at 6:54 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:28 pm EST.

What is the month with the least sunshine in New London?

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

How many hours of sunshine does New London have in December?

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

What is the month with the lowest UV index in New London?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in New London, Connecticut.

What is the UV index intensity in December in New London?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
50.9°F
41.9°F
36.1°F
Average low temperature
40.6°F
33.3°F
26.2°F
Average pressure
30.08"Hg
30.05"Hg
30.03"Hg
Average wind speed
11.1mph
11.5mph
11.9mph
Average max. wind speed
11.9mph
12.2mph
12.7mph
Average wind speed gusts
17.5mph
18mph
18.5mph
Average humidity
74%
75%
74%
Average rainfall
2.95"
3.86"
2.64"
Average rainfall days
10.7
13.4
10.8
Average snowfall
0.16"
1.22"
1.81"
Average snowfall days
0.6
4.8
5.9
Average sea temperature
55.4°F
48.9°F
41.9°F
Average daylight
9h 5min
9h 1min
9h 4min
Average sunshine
5h 3min
4h 5min
5h 1min
Average sunshine days
16.5
13.9
15.1
Average UV index
2
2
2
Average cloud cover
39%
47%
45%
Average visibility
6mi
6mi
6mi

Average temperature in December
New London, CT

Average temperature in December - New London, CT
  • Average high temperature in December: 41.9°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in December: 33.3°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

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Average pressure in December
New London, CT

Average pressure in December - New London, CT
  • Average pressure in December: 30.05"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
New London, CT

Average wind speed in December - New London, CT
  • Average wind speed in December: 11.5mph

The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).

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Average humidity in December
New London, CT

Average humidity in December - New London, CT
  • Average humidity in December: 75%

The month with the highest relative humidity is June (80%).
The months with the lowest relative humidity are January, March, April and November (74%).

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Average rainfall in December
New London, CT

Average rainfall in December - New London, 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 (1.65").

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Average rainfall days in December
New London, CT

Average rainfall days in December - New London, CT
  • Average rainfall days in December: 13.4 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (9.5 days).

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Average snowfall in December
New London, CT

Average snowfall in December - New London, CT
  • Average snowfall in December: 1.22"

The month with the highest snowfall is March (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
New London, CT

Average snowfall days in December - New London, CT
  • Average snowfall days in December: 4.8 days

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

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Average sea temperature in December
New London, CT

Average sea temperature in December - New London, CT
  • Average sea temperature in December: 48.9°F

The best month for swimming (with the highest average sea temperature) is August (72.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

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Average daylight in December /
Average sunshine in December
New London, CT

Average daylight in December / Average sunshine in December - New London, CT
  • Average daylight in December: 9h and 1min

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 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
New London, CT

Average sunshine days in December - New London, CT
  • Average sunshine days in December: 13.9 days

The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is February (12.5 days).

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Average UV index in December
New London, CT

Average UV index in December - New London, 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).

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Average cloud cover in December
New London, CT

Average cloud cover in December - New London, 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 29).

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Average visibility in December
New London, CT

Average visibility in December - New London, 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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New London, Connecticut, USA

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