December weather forecast
Deerfield, MA

Weather in December

The first month of the winter, December, is also a wintry month in Deerfield, Massachusetts, with an average temperature fluctuating between 24.3°F (-4.3°C) and 35.4°F (1.9°C).

Temperature

In Deerfield, the average high-temperature in December drops from a frosty 46°F (7.8°C) in November to a cold 35.4°F (1.9°C). The average low-temperature, in December, is 24.3°F (-4.3°C).

Humidity

In Deerfield, the average relative humidity in December is 81%.

Rainfall

The month with the most rainfall in Deerfield is December, when the rain falls for 10.9 days and typically aggregates up to 3.07" (78mm) of precipitation.

Snowfall

Months with snowfall in Deerfield are January through May, October through December. In December, it is snowing for 6.4 days. Throughout December, 4.33" (110mm) of snow is accumulated. In Deerfield, during the entire year, snow falls for 38.7 days and aggregates up to 23.07" (586mm) of snow.

Daylight

The month with the shortest days in Deerfield is December, with an average of 9h and 7min of daylight.
On the first day of the month, sunrise is at 7:00 am and sunset at 4:18 pm. On the last day of December, in Deerfield, sunrise is at 7:20 am and sunset at 4:26 pm EST.

Sunshine

The average sunshine in December is 4.9h.

UV index

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Deerfield?

The average high-temperature, in December, in Deerfield, is 35.4°F (1.9°C), while the average low-temperature is 24.3°F (-4.3°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in July is calculated to be 86°F (30°C).

What is the average humidity in December in Deerfield?

In December, the average relative humidity in Deerfield, Massachusetts, is 81%.

What is the rainiest month in Deerfield?

The month with the most rainfall is December, when the rain falls for 10.9 days and typically aggregates up to 3.07" (78mm) of precipitation.

How much does it rain in Deerfield in December?

In December, in Deerfield, Massachusetts, the rain falls for 10.9 days. Throughout December, 3.07" (78mm) of precipitation is accumulated.

How many days does it snow in December in Deerfield?

In Deerfield, in December, snow falls for 6.4 days, with typically accumulated 4.33" (110mm) of snow.

What is the month with the shortest days in Deerfield?

The month with the shortest days in Deerfield, Massachusetts, is December, with an average of 9h and 7min of daylight.

How many hours of daylight does Deerfield have in December?

In Deerfield, Massachusetts, the average day length in December is 9h and 7min.

What time are sunrise and sunset in December in Deerfield?

On the first day of December, sunrise is at 7:00 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:26 pm EST.

How long on average sun shines in December in Deerfield?

The average sunshine duration in December in Deerfield, Massachusetts, is 4.9h.

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

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

What is the UV index reading in December in Deerfield?

In Deerfield, Massachusetts, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes 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
Deerfield, MA

Average temperature in December - Deerfield, MA
  • Average high temperature in December: 35.4°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 24.3°F

The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in December
Deerfield, MA

Average pressure in December - Deerfield, MA
  • Average pressure in December: 30.05"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in December
Deerfield, MA

Average wind speed in December - Deerfield, MA
  • Average wind speed in December: 7.7mph

The windiest months (with the highest average wind speed) are January, February and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in December
Deerfield, MA

Average humidity in December - Deerfield, MA
  • Average humidity in December: 81%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in December
Deerfield, MA

Average rainfall in December - Deerfield, MA
  • Average rainfall in December: 3.07"

The wettest month (with the highest rainfall) is December (3.07").
The driest month (with the least rainfall) is September (1.69").

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Average rainfall days in December
Deerfield, MA

Average rainfall days in December - Deerfield, MA
  • Average rainfall days in December: 10.9 days

The month with the highest number of rainy days is April (15.3 days).
The month with the least rainy days is February (8.9 days).

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Average snowfall in December
Deerfield, MA

Average snowfall in December - Deerfield, MA
  • Average snowfall in December: 4.33"

The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Deerfield, MA

Average snowfall days in December - Deerfield, MA
  • Average snowfall days in December: 6.4 days

The month with the highest number of snowfall days is January (10 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
Deerfield, MA

Average daylight in December / Average sunshine in December - Deerfield, MA
  • Average daylight in December: 9h and 7min

The month with the longest days is June (Average daylight: 15h and 15min).
The month with the shortest days is December (Average daylight: 9h and 7min).

  • Average sunshine in December: 4h and 54min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in December
Deerfield, MA

Average sunshine days in December - Deerfield, MA
  • Average sunshine days in December: 16.5 days

The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is April (13.2 days).

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Average UV index in December
Deerfield, MA

Average UV index in December - Deerfield, 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).

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Average cloud cover in December
Deerfield, MA

Average cloud cover in December - Deerfield, MA
  • Average cloud cover in December: 48

The months with the most cloud cover are February and March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in December
Deerfield, MA

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

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

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