December weather forecast and climate
Terryville, CT

Weather in December

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

Temperature

In Terryville, the average high-temperature decreases, from a chilly 48.4°F (9.1°C) in November, to a cold 38.3°F (3.5°C). In Terryville, the average low-temperature is 27.7°F (-2.4°C).

Humidity

In Terryville, 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

January through May, October through December are months with snowfall. In December, it is snowing for 6.4 days. Throughout December, 3.23" (82mm) of snow is accumulated. Throughout the year, in Terryville, there are 33.9 snowfall days, and 18.43" (468mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9.2h of daylight.

Sunshine

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

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 of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in December in Terryville?

The average relative humidity in December in Terryville is 79%.

What is the rainiest month in Terryville?

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

How much does it rain in Terryville in December?

In Terryville, Connecticut, during December, the rain falls for 11.7 days and regularly aggregates up to 3.74" (95mm) of precipitation.

How many days does it snow in December in Terryville?

In Terryville, Connecticut, in December, during 6.4 snowfall days, 3.23" (82mm) of snow is typically accumulated.

What is the month with the shortest days in Terryville?

With an average of 9.2h of daylight, December has the shortest days of the year.

How many hours of daylight does Terryville have in December?

In December, the average length of the day in Terryville is 9.2h.

How long on average sun shines in December in Terryville?

In Terryville, the average sunshine in December 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.

What is the UV index reading in December in Terryville?

In Terryville, Connecticut, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.

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).

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Average pressure in December
Terryville, CT

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

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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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).

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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%).

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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").

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Average rainfall days in December
Terryville, CT

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

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).

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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").
Months with the least snowfall are June, July, August and September (0").

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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).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Terryville, CT
  • Average daylight in December: 9.2h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in December: 4.7h

Months with the most sunshine are July and August (Average sunshine: 10.2h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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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).

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Average UV index in December
Terryville, CT

Average UV index in December - Terryville, 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).

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Average cloud cover in December
Terryville, CT

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

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).

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Average visibility in December
Terryville, CT

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

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

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