December weather forecast
Ansonia, CT

Share

Weather in December

Wrapping up the year, Ansonia enters the winter season fully in December. The temperatures drop, and the city reenters the chilly weather phase it started the year with. As the temperatures oscillate between 31.3°F (-0.4°C) and 40.3°F (4.6°C), it is apparent that winter's cut and dry cold has returned. Through this chilly end to the year, the city gears up to start a new cycle in the coming January.

Temperature

December brings a drop in Ansonia's average high-temperature, falling from a frosty 49.8°F (9.9°C) in November to a cold 40.3°F (4.6°C). Ansonia upholds a consistent average temperature of 31.3°F (-0.4°C) throughout the nights of December.

Humidity

In Ansonia, the average relative humidity in December is 76%.

Rainfall

The month with the most rainfall is December, when the rain falls for 12.8 days and typically aggregates up to 4.06" (103mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Ansonia. In December, in Ansonia, it is snowing for 4.6 days. Throughout December, 2.4" (61mm) of snow is accumulated. Throughout the year, there are 27.3 snowfall days, and 11.42" (290mm) of snow is accumulated.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:59 am and sunset at 4:23 pm. On the last day of December, in Ansonia, Connecticut, sunrise is at 7:18 am and sunset at 4:33 pm EST.

Sunshine

In December, the average sunshine is 4.9h.

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 low threat to health from exposure to the Sun's UV radiation for the average person.
Note: A daily maximum UV index of 2 in December translates into the following instructions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. To guard against the harmful effects of the Sun, minimize exposure during midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Ansonia?

An average high-temperature, in December, in Ansonia, is 40.3°F (4.6°C) and the average low-temperature is 31.3°F (-0.4°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in July is appraised at 87.8°F (31°C).

What is the average humidity in December in Ansonia?

The average relative humidity in December in Ansonia is 76%.

What is the wettest month in Ansonia?

December is the month with the most rainfall. Rain falls for 12.8 days and accumulates 4.06" (103mm) of precipitation.

How much does it rain in Ansonia in December?

In Ansonia, in December, it is raining for 12.8 days, with typically 4.06" (103mm) of accumulated precipitation.

How many days does it snow in December in Ansonia?

In Ansonia, Connecticut, during December, snow falls for 4.6 days and regularly aggregates up to 2.4" (61mm) of snow.

What is the month with the shortest days in Ansonia?

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

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

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

When is the sunrise / sunset in December in Ansonia?

In December, on the first day of the month, sunrise is at 6:59 am and sunset at 4:23 pm. On the last day of the month, in Ansonia, Connecticut, sunrise is at 7:18 am and sunset at 4:33 pm EST.

How long on average sun shines in December in Ansonia?

In December, the average sunshine duration is 4.9h.

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

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

How high is the UV index in December in Ansonia?

The average daily maximum UV index in December in Ansonia, Connecticut, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from 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
Ansonia, CT

Average temperature in December - Ansonia, CT
  • Average high temperature in December: 40.3°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (34.7°F).

  • Average low temperature in December: 31.3°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 (24.6°F).

Average pressure in December
Ansonia, CT

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

Average wind speed in December - Ansonia, CT
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in December
Ansonia, CT

Average humidity in December - Ansonia, CT
  • Average humidity in December: 76%

The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Ansonia, CT

Average rainfall in December - Ansonia, CT
  • Average rainfall in December: 4.06"

The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the least rainfall) is September (2.24").

Average rainfall days in December
Ansonia, CT

Average rainfall days in December - Ansonia, CT
  • Average rainfall days in December: 12.8 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).

Average snowfall in December
Ansonia, CT

Average snowfall in December - Ansonia, CT
  • Average snowfall in December: 2.4"

The month with the highest snowfall is February (3.23").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Ansonia, CT

Average snowfall days in December - Ansonia, CT
  • Average snowfall days in December: 4.6 days

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

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

Average daylight in December / Average sunshine in December - Ansonia, 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 months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Ansonia, CT

Average sunshine days in December - Ansonia, CT
  • Average sunshine days in December: 14.5 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.3 days).

Average UV index in December
Ansonia, CT

Average UV index in December - Ansonia, 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
Ansonia, CT

Average cloud cover in December - Ansonia, 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 30).

Average visibility in December
Ansonia, CT

Average visibility in December - Ansonia, 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).

Ansonia, Connecticut, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location