December weather forecast
Norton, MA

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Weather in December

December, the first month of the winter in Norton, is also an icy month, with an average temperature varying between 29.3°F (-1.5°C) and 40.1°F (4.5°C).

Temperature

Start of December brings a shift in the average high-temperature, falling from November's cool 50°F (10°C) to an icy 40.1°F (4.5°C). Norton reports an average low-temperature of 29.3°F (-1.5°C) during the nights of December.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Norton, during December, the rain falls for 11.2 days and regularly aggregates up to 2.95" (75mm) of precipitation. Throughout the year, there are 149.9 rainfall days, and 29.09" (739mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, November and December. In Norton, during December, snow falls for 5.1 days and regularly aggregates up to 2.32" (59mm) of snow. Throughout the year, there are 29.8 snowfall days, and 14.13" (359mm) 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 December, sunrise is at 6:53 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:23 pm EST.

Sunshine

In December, the average sunshine is 4.9h.

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 reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 2 in December transforms into the following instructions:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Updated: Aug 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

December temperatures vary between a high-temperature of 40.1°F (4.5°C) and a low-temperature of 29.3°F (-1.5°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 77%.

How much does it rain in December?

In Norton, during December, the rain falls for 11.2 days and regularly aggregates up to 2.95" (75mm) of precipitation.

How much does it snow in December?

In Norton, during December, snow falls for 5.1 days and regularly aggregates up to 2.32" (59mm) 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 11min.

What time are sunrise and sunset in December in Norton?

On the first day of December, sunrise is at 6:53 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:23 pm EST.

How long on average sun shines in December in Norton?

In Norton, the average sunshine duration in December is 4.9h.

What are the months with the lowest UV index?

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 intensity in December?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health 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
Norton, MA

Average temperature in December - Norton, MA
  • Average high temperature in December: 40.1°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 (34.3°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in December
Norton, MA

Average pressure in December - Norton, MA
  • Average pressure in December: 30.04"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Norton, MA

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

The windiest months (with the highest average wind speed) are February and March (9.3mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

Average humidity in December
Norton, MA

Average humidity in December - Norton, MA
  • Average humidity in December: 77%

The months with the highest relative humidity are February, June, September and October (78%).
The month with the lowest relative humidity is April (71%).

Average rainfall in December
Norton, MA

Average rainfall in December - Norton, MA
  • Average rainfall in December: 2.95"

The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.34").

Average rainfall days in December
Norton, MA

Average rainfall days in December - Norton, MA
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in December
Norton, MA

Average snowfall in December - Norton, MA
  • Average snowfall in December: 2.32"

The month with the highest snowfall is March (4.06").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Norton, MA

Average snowfall days in December - Norton, MA
  • Average snowfall days in December: 5.1 days

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

Average daylight in December / Average sunshine in December - Norton, MA
  • 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 5min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Norton, MA

Average sunshine days in December - Norton, MA
  • Average sunshine days in December: 16.2 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is April (12.8 days).

Average UV index in December
Norton, MA

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

Average cloud cover in December - Norton, MA
  • Average cloud cover in December: 47

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

Average visibility in December
Norton, MA

Average visibility in December - Norton, MA
  • Average visibility in December: 6mi

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

Norton, Massachusetts, USA

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