December weather forecast
Monterey, MA

Share

Weather in December

The first month of the winter, December, is also a wintry month in Monterey, Massachusetts, with an average temperature fluctuating between 34.9°F (1.6°C) and 23.9°F (-4.5°C).

Temperature

Monterey in December undergoes a mild reduction in the average high-temperature, shifting from November's frosty 45.5°F (7.5°C) to an icy 34.9°F (1.6°C). The average temperature drops to a subzero cold 23.9°F (-4.5°C) during the night in the month of December.

Humidity

In Monterey, the average relative humidity in December is 83%.

Rainfall

In Monterey, during December, the rain falls for 11.2 days and regularly aggregates up to 2.87" (73mm) of precipitation. Throughout the year, there are 157.8 rainfall days, and 31.69" (805mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Monterey, Massachusetts, in December, snow falls for 10 days, with typically accumulated 5.55" (141mm) of snow. In Monterey, during the entire year, snow falls for 55.3 days and aggregates up to 29.17" (741mm) of snow.

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 7:02 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:30 pm EST.

Sunshine

The average sunshine in December is 4.3h.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: A daily maximum UV index of 1 in December translates into the following instructions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Updated: Jul 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

During December, Monterey experiences an average high-temperature of 34.9°F (1.6°C) and a low-temperature of 23.9°F (-4.5°C).

What is the average humidity in December?

In December, the average relative humidity in Monterey is 83%.

How many days does it rain in December?

In December, the rain falls for 11.2 days. Throughout December, 2.87" (73mm) of precipitation is accumulated.

How many days does it snow in December?

In Monterey, in December, during 10 snowfall days, 5.55" (141mm) of snow is typically accumulated.

What is the month with the shortest days in Monterey?

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

What is the average length of the day in December?

In December, the average day length is 9h and 10min.

When is the sunrise / sunset in December?

On the first day of December in Monterey, sunrise is at 7:02 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:30 pm EST.

How many hours of sunshine does Monterey have in December?

In Monterey, Massachusetts, the average sunshine duration in December is 4.3h.

When is the lowest UV index in Monterey?

December is the month with the lowest UV index, with an average maximum UV index of 1.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe 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
Monterey, MA

Average temperature in December - Monterey, MA
  • Average high temperature in December: 34.9°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (29.1°F).

  • Average low temperature in December: 23.9°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

Average pressure in December
Monterey, MA

Average pressure in December - Monterey, MA
  • 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
Monterey, MA

Average wind speed in December - Monterey, MA
  • Average wind speed in December: 8mph

The windiest months (with the highest average wind speed) are January and March (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

Average humidity in December
Monterey, MA

Average humidity in December - Monterey, MA
  • Average humidity in December: 83%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (75%).

Average rainfall in December
Monterey, MA

Average rainfall in December - Monterey, MA
  • Average rainfall in December: 2.87"

The wettest month (with the highest rainfall) is October (3.03").
The driest month (with the least rainfall) is January (2.13").

Average rainfall days in December
Monterey, MA

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

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (8.2 days).

Average snowfall in December
Monterey, MA

Average snowfall in December - Monterey, MA
  • Average snowfall in December: 5.55"

The month with the highest snowfall is February (6.89").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Monterey, MA

Average snowfall days in December - Monterey, MA
  • Average snowfall days in December: 10 days

The month with the highest number of snowfall days is February (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Monterey, MA

Average daylight in December / Average sunshine in December - Monterey, 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 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).

Average sunshine days in December
Monterey, MA

Average sunshine days in December - Monterey, MA
  • Average sunshine days in December: 13.4 days

The months with the most sunshine days are September and November (15.5 days).
The month with the least sunshine days is February (11.1 days).

Average UV index in December
Monterey, MA

Average UV index in December - Monterey, MA
  • Average UV index in December: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Monterey, MA

Average cloud cover in December - Monterey, MA
  • Average cloud cover in December: 55

The month with the most cloud cover is February (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 37).

Average visibility in December
Monterey, MA

Average visibility in December - Monterey, MA
  • Average visibility in December: 5mi

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

Monterey, Massachusetts, USA

Weather forecast for your location

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