December weather forecast
Roslindale, MA

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Weather in December

The first month of the winter, December, is also an icy month in Roslindale, Massachusetts, with an average temperature varying between 39.2°F (4°C) and 28.8°F (-1.8°C).

Temperature

December's arrival corresponds with a decrease in average high-temperatures, from November's frosty 49.3°F (9.6°C) to a cold 39.2°F (4°C). An average nighttime temperature of 28.8°F (-1.8°C) is witnessed throughout December.

Humidity

In December, the average relative humidity is 76%.

Rainfall

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

Snowfall

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

Daylight

December has the shortest days of the year, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 6:54 am and sunset at 4:13 pm. On the last day of December, sunrise is at 7:13 am and sunset at 4:22 pm EST.

Sunshine

In Roslindale, 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 of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Opt for tightly woven and loose clothing to enhance protection from the Sun. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
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Frequently asked questions

Is it cold in Roslindale during December?

Roslindale in December has an average high-temperature of 39.2°F (4°C) and an average low-temperature of 28.8°F (-1.8°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 84.2°F (29°C).

What is the average humidity in December in Roslindale?

The average relative humidity in December in Roslindale, Massachusetts, is 76%.

How many days does it rain in December in Roslindale?

In Roslindale, Massachusetts, in December, it is raining for 6.1 days, with typically 0.55" (14mm) of accumulated precipitation.

What is the snowiest month in Roslindale?

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

How much does it snow in Roslindale in December?

In Roslindale, Massachusetts, in December, snow falls for 2.6 days, with typically accumulated 0.91" (23mm) of snow.

What is the month with the shortest days in Roslindale?

With an average of 9h and 6min of daylight, December has the shortest days of the year in Roslindale.

How many hours of daylight does Roslindale have in December?

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

When are sunrise and sunset in December in Roslindale?

In December, on the first day of the month, sunrise is at 6:54 am and sunset at 4:13 pm. On the last day of the month, in Roslindale, sunrise is at 7:13 am and sunset at 4:22 pm EST.

How long on average sun shines in December in Roslindale?

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

When is the lowest UV index in Roslindale?

The months with the lowest UV index in Roslindale, Massachusetts, are January through March, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Roslindale?

In Roslindale, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to 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
Roslindale, MA

Average temperature in December - Roslindale, 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
Roslindale, MA

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

Average wind speed in December - Roslindale, 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
Roslindale, MA

Average humidity in December - Roslindale, 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
Roslindale, MA

Average rainfall in December - Roslindale, 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
Roslindale, MA

Average rainfall days in December - Roslindale, 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
Roslindale, MA

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

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

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Average snowfall days in December
Roslindale, MA

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

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

Average daylight in December / Average sunshine in December - Roslindale, 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 5min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in December
Roslindale, MA

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

The 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
Roslindale, MA

Average UV index in December - Roslindale, 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
Roslindale, MA

Average cloud cover in December - Roslindale, 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
Roslindale, MA

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

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

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Roslindale, Massachusetts, USA

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