December weather forecast
South Lee, MA

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Weather in December

December, the first month of the winter in South Lee, is also a wintry month, with an average temperature ranging between max 34.2°F (1.2°C) and min 23°F (-5°C).

Temperature

The onset of December introduces a moderate change in South Lee's weather, with average high-temperatures falling from November's chilly 44.4°F (6.9°C) to a wintry 34.2°F (1.2°C). The low-temperature average for South Lee during December stands at a subzero cold 23°F (-5°C).

Humidity

In December, the average relative humidity is 84%.

Rainfall

In South Lee, in December, during 4.7 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, there are 88.8 rainfall days, and 7.32" (186mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. December is the month with the most snowfall. Snow falls for 5.9 days and accumulates 1.34" (34mm) of snow.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:03 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.

Sunshine

In December, the average sunshine is 4.2h.

UV index

The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 2 translates into these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Updated: Aug 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

An average high-temperature, in December, in South Lee, is 34.2°F (1.2°C) and the average low-temperature is 23°F (-5°C).

What is the average humidity in December?

The average relative humidity in December is 84%.

How much does it rain in December?

In South Lee, in December, during 4.7 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

When does it snow the most?

December is the month with the most snowfall. Snow falls for 5.9 days and accumulates 1.34" (34mm) of snow.

How many days does it snow in December?

In South Lee, in December, during 5.9 snowfall days, 1.34" (34mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 6min 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 9min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:03 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 long on average sun shines in December?

The average sunshine duration in December is 4.2h.

What is the month with the lowest UV index?

The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2.

What is the UV index intensity in December?

In South Lee, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk 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
South Lee, MA

Average temperature in December - South Lee, MA
  • Average high temperature in December: 34.2°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in December: 23°F

The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).

Average pressure in December
South Lee, MA

Average pressure in December - South Lee, 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 (29.92"Hg).

Average wind speed in December
South Lee, MA

Average wind speed in December - South Lee, MA
  • Average wind speed in December: 8.3mph

The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
South Lee, MA

Average humidity in December - South Lee, MA
  • Average humidity in December: 84%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (76%).

Average rainfall in December
South Lee, MA

Average rainfall in December - South Lee, MA
  • Average rainfall in December: 0.63"

The wettest month (with the highest rainfall) is July (0.83").
The driest month (with the least rainfall) is September (0.35").

Average rainfall days in December
South Lee, MA

Average rainfall days in December - South Lee, MA
  • Average rainfall days in December: 4.7 days

The month with the highest number of rainy days is July (11 days).
The month with the least rainy days is January (3.6 days).

Average snowfall in December
South Lee, MA

Average snowfall in December - South Lee, MA
  • Average snowfall in December: 1.34"

The month with the highest snowfall is December (1.34").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
South Lee, MA

Average snowfall days in December - South Lee, MA
  • Average snowfall days in December: 5.9 days

The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
South Lee, MA

Average daylight in December / Average sunshine in December - South Lee, 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 6min).

  • Average sunshine in December: 4h and 1min

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 42min).

Average sunshine days in December
South Lee, MA

Average sunshine days in December - South Lee, MA
  • Average sunshine days in December: 22.2 days

The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is June (17.1 days).

Average UV index in December
South Lee, MA

Average UV index in December - South Lee, MA
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

Average cloud cover in December
South Lee, MA

Average cloud cover in December - South Lee, MA
  • Average cloud cover in December: 56

The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 37).

Average visibility in December
South Lee, MA

Average visibility in December - South Lee, MA
  • Average visibility in December: 6mi

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

South Lee, Massachusetts, USA

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