December weather forecast
Newton, MA

Ancient historic buildings within the Union Historic District in Newton City, Massachusetts
Ancient historic buildings within the Union Historic District in Newton City, Massachusetts

Weather in December

December, the first month of the winter, in Newton, is also a wintry month, with average temperature fluctuating between 39.2°F (4°C) and 28.8°F (-1.8°C).

Temperature

In Newton, Massachusetts, the average high-temperature drops, from a frosty 49.3°F (9.6°C) in November, to a cold 39.2°F (4°C). In Newton, the average low-temperature is 28.8°F (-1.8°C).

Humidity

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

Rainfall

In Newton, during 6.1 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Newton, during the entire year, the rain falls for 85.9 days and collects up to 5.87" (149mm) of precipitation.

Snowfall

Months with snowfall in Newton are January through May, November and December. The month with the most snowfall is December when snow falls for 2.6 days and typically aggregates up to 0.91" (23mm) of snow.

Daylight

With an average of 9.1h of daylight, December has the shortest days of the year in Newton.

Sunshine

In December, the average sunshine in Newton is 4.9h.

UV index

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 threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the average humidity in December in Newton?

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

How much does it rain in Newton in December?

In Newton, Massachusetts, during December, the rain falls for 6.1 days and regularly aggregates up to 0.55" (14mm) of precipitation.

What is the snowiest month in Newton?

December is the month with the most snowfall in Newton. Snow falls for 2.6 days and accumulates 0.91" (23mm) of snow.

How much does it snow in Newton in December?

In December, in Newton, it is snowing for 2.6 days. Throughout December, 0.91" (23mm) of snow is accumulated.

What is the month with the shortest days in Newton?

December has the shortest days of the year in Newton, with an average of 9.1h of daylight.

How many hours of daylight does Newton have in December?

In Newton, Massachusetts, the average length of the day in December is 9.1h.

How long on average sun shines in December in Newton?

In December, the average sunshine in Newton, Massachusetts, is 4.9h.

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

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

How high is the UV index in December in Newton?

In Newton, Massachusetts, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in December
Newton, MA

Average temperature in December - Newton, MA
  • Average high temperature in December: 39.2°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 (33.6°F).

  • Average low temperature in December: 28.8°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

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Average pressure in December
Newton, MA

Average pressure in December - Newton, MA
  • Average pressure in December: 30.03"

The month with the highest atmospheric pressure is November (30.07").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in December
Newton, MA

Average wind speed in December - Newton, MA
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in December
Newton, MA

Average humidity in December - Newton, MA
  • Average humidity in December: 76%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).

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Average rainfall in December
Newton, MA

Average rainfall in December - Newton, MA
  • Average rainfall in December: 0.55"

The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.24").

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Average rainfall days in December
Newton, MA

Average rainfall days in December - Newton, MA
  • Average rainfall days in December: 6.1 days

The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is February (4.1 days).

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Average snowfall in December
Newton, MA

Average snowfall in December - Newton, MA
  • Average snowfall in December: 0.91"

The month with the highest snowfall is December (0.91").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
Newton, MA

Average snowfall days in December - Newton, MA
  • Average snowfall days in December: 2.6 days

The month with the highest number of snowfall days is January (4.9 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
Newton, MA

Average daylight in December / Average sunshine in December - Newton, MA
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in December: 4.9h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in December
Newton, MA

Average sunshine days in December - Newton, MA
  • Average sunshine days in December: 22.2 days

Months with the most sunshine days are January and November (22.5 days).
The month with the least sunshine days is June (17.5 days).

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Average UV index in December
Newton, MA

Average UV index in December - Newton, MA
  • 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
Newton, MA

Average cloud cover in December - Newton, MA
  • Average cloud cover in December: 46

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in December
Newton, MA

Average visibility in December - Newton, MA
  • 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).

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