December weather forecast
Terryville, CT

Share

Weather in December

The first month of the winter, December, is also a wintry month in Terryville, Connecticut, with an average temperature fluctuating between 27.7°F (-2.4°C) and 38.3°F (3.5°C).

Temperature

December comes with a decrease in the average high-temperature, falling from a frosty 48.4°F (9.1°C) in November to a cold 38.3°F (3.5°C). An average nighttime temperature of 27.7°F (-2.4°C) is noted during the month of December.

Humidity

In December, the average relative humidity is 79%.

Rainfall

The month with the most rainfall is December, when the rain falls for 11.7 days and typically aggregates up to 3.74" (95mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Terryville, during December, snow falls for 6.4 days and regularly aggregates up to 3.23" (82mm) of snow. Throughout the year, there are 33.9 snowfall days, and 18.43" (468mm) of snow is accumulated.

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 7:00 am and sunset at 4:22 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:31 pm EST.

Sunshine

The average sunshine in December in Terryville is 4.7h.

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 of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, an average UV index of 2 transforms into the following instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Updated: Jun 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

During December, Terryville experiences an average high-temperature of 38.3°F (3.5°C) and a low-temperature of 27.7°F (-2.4°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in July is calculated to be 89.6°F (32°C).

What is the average humidity in December?

In December, the average relative humidity is 79%.

What is the wettest month?

December is the month with the most rainfall in Terryville. Rain falls for 11.7 days and accumulates 3.74" (95mm) of precipitation.

How many days does it rain in December?

In Terryville, in December, it is raining for 11.7 days, with typically 3.74" (95mm) of accumulated precipitation.

How much does it snow in December?

In Terryville, in December, snow falls for 6.4 days, with typically accumulated 3.23" (82mm) of snow.

What is the month with the shortest days?

With an average of 9h and 12min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 9h and 13min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:00 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:31 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration in Terryville is 4.7h.

When is the lowest UV index in Terryville?

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

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk 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
Terryville, CT

Average temperature in December - Terryville, CT
  • Average high temperature in December: 38.3°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in December: 27.7°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

Average pressure in December
Terryville, CT

Average pressure in December - Terryville, 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
Terryville, CT

Average wind speed in December - Terryville, CT
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
Terryville, CT

Average humidity in December - Terryville, CT
  • Average humidity in December: 79%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Terryville, CT

Average rainfall in December - Terryville, CT
  • Average rainfall in December: 3.74"

The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is September (2.24").

Average rainfall days in December
Terryville, CT

Average rainfall days in December - Terryville, CT
  • Average rainfall days in December: 11.7 days

The months with the highest number of rainy days are May and July (18.3 days).
The month with the least rainy days is February (9.3 days).

Average snowfall in December
Terryville, CT

Average snowfall in December - Terryville, CT
  • Average snowfall in December: 3.23"

The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Terryville, CT

Average snowfall days in December - Terryville, CT
  • Average snowfall days in December: 6.4 days

The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 4h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

Average sunshine days in December
Terryville, CT

Average sunshine days in December - Terryville, CT
  • Average sunshine days in December: 14.9 days

The month with the most sunshine days is January (16.7 days).
The month with the least sunshine days is June (10 days).

Average UV index in December
Terryville, CT

Average UV index in December - Terryville, 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
Terryville, CT

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

The months with the most cloud cover are February and March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in December
Terryville, CT

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

The months with the highest visibility are January, April, October, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August and September (5mi).

Terryville, Connecticut, USA

Weather forecast for your location

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