December weather forecast
Killingworth, CT

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Weather in December

December, the first month of the winter in Killingworth, is still a cold month, with an average temperature varying between 32.4°F (0.2°C) and 41.9°F (5.5°C).

Temperature

The arrival of December corresponds with a light shift in temperature, down from a cool 50.7°F (10.4°C) in November to a cold 41.9°F (5.5°C). Throughout December, Killingworth witnesses a nighttime temperature average of 32.4°F (0.2°C).

Humidity

The average relative humidity in December in Killingworth, Connecticut, is 75%.

Rainfall

The month with the most rainfall is December, when the rain falls for 13 days and typically aggregates up to 3.66" (93mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In December, it is snowing for 4.4 days. Throughout December, 1.34" (34mm) of snow is accumulated. In Killingworth, during the entire year, snow falls for 24.2 days and aggregates up to 9.53" (242mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 6:57 am and sunset at 4:21 pm. On the last day of December, in Killingworth, sunrise is at 7:16 am and sunset at 4:31 pm EST.

Sunshine

February and December, with an average of 4.8h of sunshine, are months with the least sunshine.

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 minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 2 in December translates into the following instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold in Killingworth?

An average high-temperature, in December, in Killingworth, is 41.9°F (5.5°C) and the average low-temperature is 32.4°F (0.2°C).

What is the average humidity in December in Killingworth?

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

What is the rainiest month in Killingworth?

December is the month with the most rainfall in Killingworth. Rain falls for 13 days and accumulates 3.66" (93mm) of precipitation.

How many days does it rain in December in Killingworth?

In Killingworth, during December, the rain falls for 13 days and regularly aggregates up to 3.66" (93mm) of precipitation.

How much does it snow in Killingworth in December?

In December, it is snowing for 4.4 days. Throughout December, 1.34" (34mm) of snow is accumulated.

What is the month with the shortest days in Killingworth?

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

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

The average day length in December in Killingworth, Connecticut, is 9h and 15min.

When is the sunrise / sunset in December in Killingworth?

In December, on the first day of the month, sunrise is at 6:57 am and sunset at 4:21 pm. On the last day of the month, in Killingworth, sunrise is at 7:16 am and sunset at 4:31 pm EST.

What are the months with the least sunshine in Killingworth?

The months with the least sunshine in Killingworth are February and December, with an average of 4.8h of sunshine.

How many hours of sunshine does Killingworth have in December?

In Killingworth, Connecticut, the average sunshine duration in December is 4.8h.

What are the months with the lowest UV index in Killingworth?

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

What is the UV index reading in December in Killingworth?

In December, the average daily maximum UV index in Killingworth is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.
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
Killingworth, CT

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

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 32.4°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).

Average pressure in December
Killingworth, CT

Average pressure in December - Killingworth, 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).

Average wind speed in December
Killingworth, CT

Average wind speed in December - Killingworth, CT
  • Average wind speed in December: 10.6mph

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

Average humidity in December
Killingworth, CT

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

The months with the highest relative humidity are May, June and July (78%).
The month with the lowest relative humidity is April (73%).

Average rainfall in December
Killingworth, CT

Average rainfall in December - Killingworth, CT
  • Average rainfall in December: 3.66"

The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.93").

Average rainfall days in December
Killingworth, CT

Average rainfall days in December - Killingworth, CT
  • Average rainfall days in December: 13 days

The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (9 days).

Average snowfall in December
Killingworth, CT

Average snowfall in December - Killingworth, CT
  • Average snowfall in December: 1.34"

The month with the highest snowfall is March (2.76").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Killingworth, CT

Average snowfall days in December - Killingworth, CT
  • Average snowfall days in December: 4.4 days

The month with the highest number of snowfall days is February (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
Killingworth, CT

Average daylight in December / Average sunshine in December - Killingworth, 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 48min).

Average sunshine days in December
Killingworth, CT

Average sunshine days in December - Killingworth, CT
  • Average sunshine days in December: 14.8 days

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is July (11.7 days).

Average UV index in December
Killingworth, CT

Average UV index in December - Killingworth, 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
Killingworth, CT

Average cloud cover in December - Killingworth, CT
  • Average cloud cover in December: 48

The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in December
Killingworth, CT

Average visibility in December - Killingworth, 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).

Killingworth, Connecticut, USA

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