December weather forecast
Byfield, MA

Weather in December

December, the first month of the winter, in Byfield, is still a cold month, with average temperature ranging between max 38.5°F (3.6°C) and min 29.3°F (-1.5°C).

Temperature

In December, the average high-temperature decreases, from a frosty 48°F (8.9°C) in November, to a wintry 38.5°F (3.6°C). In December, the average low-temperature is 29.3°F (-1.5°C).

Humidity

In Byfield, Massachusetts, the average relative humidity is 77%.

Rainfall

December is the month with the most rainfall. Rain falls for 11.4 days and accumulates 2.95" (75mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Byfield. In Byfield, during 5.8 snowfall days, 3.39" (86mm) of snow is typically accumulated. Throughout the year, in Byfield, Massachusetts, there are 33.6 snowfall days, and 14.96" (380mm) of snow is accumulated.

Daylight

With an average of 9.1h of daylight, December has the shortest days of the year in Byfield.

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 in Byfield. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 2 in December transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 average humidity in December in Byfield?

The average relative humidity in December is 77%.

What is the wettest month in Byfield?

December is the month with the most rainfall in Byfield. Rain falls for 11.4 days and accumulates 2.95" (75mm) of precipitation.

How much does it rain in Byfield in December?

In December, in Byfield, the rain falls for 11.4 days. Throughout December, 2.95" (75mm) of precipitation is accumulated.

How many days does it snow in December in Byfield?

In December, in Byfield, Massachusetts, it is snowing for 5.8 days. Throughout December, 3.39" (86mm) of snow is accumulated.

What is the month with the shortest days in Byfield?

With an average of 9.1h of daylight, December has the shortest days of the year.

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

The average length of the day in December in Byfield is 9.1h.

How long on average sun shines in December in Byfield?

The average sunshine in December in Byfield is 4.9h.

What is the month with the lowest UV index in Byfield?

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 reading in December in Byfield?

In Byfield, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to the Sun's UV rays.

Average temperature in December
Byfield, MA

Average temperature in December - Byfield, MA
  • Average high temperature in December: 38.5°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (32.7°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure in December
Byfield, MA

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

The month with the highest atmospheric pressure is November (30.06").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in December
Byfield, MA

Average wind speed in December - Byfield, MA
  • Average wind speed in December: 10.9mph

The windiest month (with the highest average wind speed) is January (11.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).

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Average humidity in December
Byfield, MA

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

Months with the highest relative humidity are February and June (78%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in December
Byfield, MA

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

The wettest month (with the highest rainfall) is December (2.95").
The driest month (with the least rainfall) is September (1.34").

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Average rainfall days in December
Byfield, MA

Average rainfall days in December - Byfield, MA
  • Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is May (15.7 days).
Months with the least rainy days are January and February (8.6 days).

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Average snowfall in December
Byfield, MA

Average snowfall in December - Byfield, MA
  • Average snowfall in December: 3.39"

The month with the highest snowfall is February (4.02").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Byfield, MA

Average snowfall days in December - Byfield, MA
  • Average snowfall days in December: 5.8 days

The month with the highest number of snowfall days is January (9.1 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Byfield, MA
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in December: 4.9h

The month with the most sunshine is August (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in December
Byfield, MA

Average sunshine days in December - Byfield, MA
  • Average sunshine days in December: 14.8 days

The month with the most sunshine days is August (18.2 days).
The month with the least sunshine days is March (12.8 days).

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Average UV index in December
Byfield, MA

Average UV index in December - Byfield, MA
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 6).
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
Byfield, MA

Average cloud cover in December - Byfield, 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 29).

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Average visibility in December
Byfield, MA

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

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

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