December weather forecast
Rehoboth, MA

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Weather in December

The first month of the winter, December, is still a cold month in Rehoboth, Massachusetts, with temperature in the range of an average low of 30.2°F (-1°C) and an average high of 40.8°F (4.9°C).

Temperature

December brings a drop in Rehoboth's average high-temperature, falling from a fresh 50.5°F (10.3°C) in November to a wintry 40.8°F (4.9°C). An average low-temperature of 30.2°F (-1°C) is expected during December.

Humidity

The average relative humidity in December is 76%.

Rainfall

In Rehoboth, in December, during 11.3 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. Throughout the year, there are 144.3 rainfall days, and 23.35" (593mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall. In December, it is snowing for 3.9 days. Throughout December, 1.42" (36mm) of snow is accumulated. Throughout the year, there are 22 snowfall days, and 7.83" (199mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 6:53 am and sunset at 4:14 pm. On the last day of December, sunrise is at 7:12 am and sunset at 4:24 pm EST.

Sunshine

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 unsafe exposure to UV radiation for the average person.
Note: In December, a regular UV index of 2 translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take note! UV radiation from the Sun can double in intensity due to snow reflection.

Frequently asked questions

How cold is December?

The average high-temperature and low-temperature in Rehoboth during December are 40.8°F (4.9°C) and 30.2°F (-1°C) respectively. The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in July is computed to be 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 76%.

How much does it rain in Rehoboth in December?

In Rehoboth, in December, during 11.3 rainfall days, 2.24" (57mm) of precipitation is typically accumulated.

How much does it snow in December?

In December, it is snowing for 3.9 days. Throughout December, 1.42" (36mm) of snow is accumulated.

What is the month with the shortest days?

With an average of 9h and 12min of daylight, December has the shortest days of the year.

How many hours of daylight does Rehoboth have in December?

In Rehoboth, the average day length in December is 9h and 12min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 6:53 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:24 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 4.9h.

When is the lowest UV index?

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

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from 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
Rehoboth, MA

Average temperature in December - Rehoboth, MA
  • Average high temperature in December: 40.8°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in December: 30.2°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).

Average pressure in December
Rehoboth, MA

Average pressure in December - Rehoboth, 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 (29.93"Hg).

Average wind speed in December
Rehoboth, MA

Average wind speed in December - Rehoboth, MA
  • Average wind speed in December: 9.3mph

The windiest months (with the highest average wind speed) are January, February and March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in December
Rehoboth, MA

Average humidity in December - Rehoboth, MA
  • Average humidity in December: 76%

The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Rehoboth, MA

Average rainfall in December - Rehoboth, MA
  • Average rainfall in December: 2.24"

The wettest month (with the highest rainfall) is April (2.4").
The driest month (with the least rainfall) is September (1.06").

Average rainfall days in December
Rehoboth, MA

Average rainfall days in December - Rehoboth, MA
  • Average rainfall days in December: 11.3 days

The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in December
Rehoboth, MA

Average snowfall in December - Rehoboth, MA
  • Average snowfall in December: 1.42"

The month with the highest snowfall is February (2.01").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Rehoboth, MA

Average snowfall days in December - Rehoboth, MA
  • Average snowfall days in December: 3.9 days

The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Rehoboth, 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 12min).

  • 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 48min).

Average sunshine days in December
Rehoboth, MA

Average sunshine days in December - Rehoboth, MA
  • Average sunshine days in December: 16.8 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is April (13.2 days).

Average UV index in December
Rehoboth, MA

Average UV index in December - Rehoboth, 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).

Average cloud cover in December
Rehoboth, MA

Average cloud cover in December - Rehoboth, MA
  • Average cloud cover in December: 46

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in December
Rehoboth, MA

Average visibility in December - Rehoboth, 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).

Rehoboth, Massachusetts, USA

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