December weather forecast
Southborough, MA

Weather in December

December, the first month of the winter in Southborough, is also a wintry month, with temperature in the range of an average high of 38.3°F (3.5°C) and an average low of 27°F (-2.8°C).

Temperature

In Southborough, the average high-temperature in December drops from a chilly 48.6°F (9.2°C) in November to a cold 38.3°F (3.5°C). In Southborough, in December, the average low-temperature is 27°F (-2.8°C).

Humidity

The average relative humidity in December in Southborough, Massachusetts, is 77%.

Rainfall

The wettest months in Southborough are March, November and December, with an average 2.56" (65mm) of rainfall.

Snowfall

Months with snowfall are January through May, October through December. In Southborough, during 5.5 snowfall days, 4.65" (118mm) of snow is typically accumulated. In Southborough, Massachusetts, during the entire year, snow falls for 32.4 days and aggregates up to 21.61" (549mm) of snow.

Daylight

The month with the shortest days in Southborough is December, with an average of 9h and 9min of daylight.
On the first day of December in Southborough, Massachusetts, sunrise is at 6:55 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:23 pm EST.

Sunshine

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

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 Southborough?

In December, in Southborough, the average high-temperature is 38.3°F (3.5°C), and the average low-temperature is 27°F (-2.8°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in July is calculated to be 87.8°F (31°C).

What is the average humidity in December in Southborough?

The average relative humidity in December in Southborough is 77%.

What is the wettest month in Southborough?

The months with the most rainfall in Southborough are March, November and December, with an average 2.56" (65mm) of precipitation.

How many days does it rain in December in Southborough?

In Southborough, in December, it is raining for 9.5 days, with typically 2.56" (65mm) of accumulated precipitation.

How much does it snow in Southborough in December?

In Southborough, Massachusetts, in December, snow falls for 5.5 days, with typically accumulated 4.65" (118mm) of snow.

What is the month with the shortest days in Southborough?

With an average of 9h and 9min of daylight, December has the shortest days of the year in Southborough, Massachusetts.

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

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

What time are sunrise and sunset in December in Southborough?

In December, on the first day of the month, sunrise is at 6:55 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:23 pm EST.

How long on average sun shines in December in Southborough?

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

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

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 in Southborough?

In December, the average daily maximum UV index in Southborough, Massachusetts, is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation.
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
Southborough, MA

Average temperature in December - Southborough, MA
  • Average high temperature in December: 38.3°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in December: 27°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in December
Southborough, MA

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

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Average wind speed in December
Southborough, MA

Average wind speed in December - Southborough, MA
  • Average wind speed in December: 8.1mph

The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in December
Southborough, MA

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

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in December
Southborough, MA

Average rainfall in December - Southborough, MA
  • Average rainfall in December: 2.56"

The wettest months (with the highest rainfall) are March, November and December (2.56").
The driest month (with the least rainfall) is September (1.34").

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Average rainfall days in December
Southborough, MA

Average rainfall days in December - Southborough, MA
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (6.8 days).

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Average snowfall in December
Southborough, MA

Average snowfall in December - Southborough, MA
  • Average snowfall in December: 4.65"

The month with the highest snowfall is February (5.24").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Southborough, MA

Average snowfall days in December - Southborough, MA
  • Average snowfall days in December: 5.5 days

The month with the highest number of snowfall days is February (7.8 days).
The 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
Southborough, MA

Average daylight in December / Average sunshine in December - Southborough, MA
  • Average daylight in December: 9h and 9min

The month with the longest days is June (Average daylight: 15h and 13min).
The month with the shortest days is December (Average daylight: 9h and 9min).

  • Average sunshine in December: 4h and 54min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in December
Southborough, MA

Average sunshine days in December - Southborough, MA
  • Average sunshine days in December: 17.6 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is April (13.4 days).

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Average UV index in December
Southborough, MA

Average UV index in December - Southborough, 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).

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Average cloud cover in December
Southborough, MA

Average cloud cover in December - Southborough, 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 34).

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Average visibility in December
Southborough, MA

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

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

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