December weather forecast and climate
Newtown, CT

Weather in December

December, the first month of the winter, in Newtown, is still a cold month, with average temperature ranging between min 29.3°F (-1.5°C) and max 39.6°F (4.2°C).

Temperature

In Newtown, the average high-temperature in December decreases, from a frosty 48.7°F (9.3°C) in November, to a cold 39.6°F (4.2°C). In December, in Newtown, Connecticut, the average low-temperature is 29.3°F (-1.5°C).

Humidity

In Newtown, the average relative humidity is 78%.

Rainfall

The month with the most rainfall is December when the rain falls for 12 days and typically aggregates up to 4.02" (102mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Newtown. In December, in Newtown, it is snowing for 5.8 days. Throughout December, 3.58" (91mm) of snow is accumulated. In Newtown, Connecticut, during the entire year, snow falls for 34.5 days, and aggregates up to 17.01" (432mm) of snow.

Daylight

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

Sunshine

In Newtown, the average sunshine 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 in Newtown. A UV Index value of 2, and less, symbolizes a low health risk 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. 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 temperature in December in Newtown?

In December, in Newtown, Connecticut, the average high-temperature is 39.6°F (4.2°C), and the average low-temperature is 29.3°F (-1.5°C).

What is the average humidity in December in Newtown?

In December, the average relative humidity is 78%.

How many days does it rain in December in Newtown?

In December, the rain falls for 12 days. Throughout December, 4.02" (102mm) of precipitation is accumulated.

What is the rainiest month in Newtown?

The month with the most rainfall is December when the rain falls for 12 days and typically aggregates up to 4.02" (102mm) of precipitation.

How much does it snow in Newtown in December?

In Newtown, Connecticut, in December, during 5.8 snowfall days, 3.58" (91mm) of snow is typically accumulated.

What is the month with the shortest days in Newtown?

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

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

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

How long on average sun shines in December in Newtown?

The average sunshine in December in Newtown, Connecticut, is 4.7h.

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

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

What is the UV index reading in December in Newtown?

The average daily maximum UV index in December in Newtown is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in December
Newtown, CT

Average temperature in December - Newtown, CT
  • Average high temperature in December: 39.6°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

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Average pressure in December
Newtown, CT

Average pressure in December - Newtown, 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
Newtown, CT

Average wind speed in December - Newtown, CT
  • Average wind speed in December: 8.1mph

The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in December
Newtown, CT

Average humidity in December - Newtown, CT
  • Average humidity in December: 78%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in December
Newtown, CT

Average rainfall in December - Newtown, CT
  • Average rainfall in December: 4.02"

The wettest month (with the highest rainfall) is December (4.02").
The driest months (with the least rainfall) are January and September (2.4").

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Average rainfall days in December
Newtown, CT

Average rainfall days in December - Newtown, CT
  • Average rainfall days in December: 12 days

The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in December
Newtown, CT

Average snowfall in December - Newtown, CT
  • Average snowfall in December: 3.58"

The month with the highest snowfall is February (4.37").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Newtown, CT

Average snowfall days in December - Newtown, CT
  • Average snowfall days in December: 5.8 days

The month with the highest number of snowfall days is February (9.5 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
Newtown, CT

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

The month with the longest days is June (Average daylight: 15.1h).
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: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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Average sunshine days in December
Newtown, CT

Average sunshine days in December - Newtown, CT
  • Average sunshine days in December: 14.1 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (10.1 days).

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Average UV index in December
Newtown, CT

Average UV index in December - Newtown, 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
Newtown, CT

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

Months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in December
Newtown, CT

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

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

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