December weather forecast and climate
Darien, CT

Weather in December

The first month of the winter, December, is still a cold month in Darien, Connecticut, with average temperature ranging between min 33.3°F (0.7°C) and max 41.9°F (5.5°C).

Temperature

In Darien, the average high-temperature in December drops, from a fresh 50.9°F (10.5°C) in November, to a cold 41.9°F (5.5°C). In Darien, in December, the average low-temperature is 33.3°F (0.7°C).

Humidity

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

Rainfall

The wettest months in Darien are July and December, with an average 4.17" (106mm) of rainfall.

Snowfall

Months with snowfall are January through April, November and December. In Darien, snow falls for 4.2 days, with typically accumulated 1.69" (43mm) of snow. Throughout the year, there are 25.7 snowfall days, and 9.09" (231mm) of snow is accumulated.

Daylight

With an average of 9.3h of daylight, December has the shortest days of the year.

Sunshine

The average sunshine in Darien is 4.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the temperature in December in Darien?

In December, in Darien, Connecticut, the average high-temperature is 41.9°F (5.5°C), and the average low-temperature is 33.3°F (0.7°C).

What is the average humidity in December in Darien?

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

How much does it rain in Darien in December?

In Darien, in December, it is raining for 12.4 days, with typically 4.17" (106mm) of accumulated precipitation.

What is the wettest month in Darien?

Months with the most rainfall in Darien, Connecticut, are July and December, with an average 4.17" (106mm) of precipitation.

How much does it snow in Darien in December?

In Darien, in December, snow falls for 4.2 days, with typically accumulated 1.69" (43mm) of snow.

What is the month with the shortest days in Darien?

December has the shortest days of the year in Darien, with an average of 9.3h of daylight.

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

In December, the average length of the day is 9.3h.

How many hours of sunshine does Darien have in December?

In Darien, the average sunshine in December is 4.8h.

When is the lowest UV index in Darien?

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

What is the UV index reading in December in Darien?

In Darien, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays.

Average temperature in December
Darien, CT

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

The warmest month (with the highest average high temperature) is July (81.3°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 (68.9°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

[Resources]

Average pressure in December
Darien, CT

Average pressure in December - Darien, CT
  • Average pressure in December: 30.06"

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

[Resources]

Average wind speed in December
Darien, CT

Average wind speed in December - Darien, CT
  • Average wind speed in December: 9.9mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

[Resources]

Average humidity in December
Darien, CT

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

The month with the highest relative humidity is May (76%).
Months with the lowest relative humidity are April, August and November (72%).

[Resources]

Average rainfall in December
Darien, CT

Average rainfall in December - Darien, CT
  • Average rainfall in December: 4.17"

The wettest months (with the highest rainfall) are July and December (4.17").
The driest month (with the least rainfall) is January (2.48").

[Resources]

Average rainfall days in December
Darien, CT

Average rainfall days in December - Darien, CT
  • Average rainfall days in December: 12.4 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.8 days).

[Resources]

Average snowfall in December
Darien, CT

Average snowfall in December - Darien, CT
  • Average snowfall in December: 1.69"

The month with the highest snowfall is February (2.64").
Months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days in December
Darien, CT

Average snowfall days in December - Darien, CT
  • Average snowfall days in December: 4.2 days

The month with the highest number of snowfall days is February (7.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Darien, CT
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 4.8h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

[Resources]

Average sunshine days in December
Darien, CT

Average sunshine days in December - Darien, CT
  • Average sunshine days in December: 14.3 days

The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is June (10.8 days).

[Resources]

Average UV index in December
Darien, CT

Average UV index in December - Darien, CT
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

[Resources]

Average cloud cover in December
Darien, CT

Average cloud cover in December - Darien, CT
  • Average cloud cover in December: 49

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).

[Resources]

Average visibility in December
Darien, CT

Average visibility in December - Darien, CT
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]